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    Suricata/Snort master SID disablesid.conf

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    • D
      deanot
      last edited by

      The list is a good idea, BUT, we have no idea what is being suppressed.  At least I have no idea…..  Using this list literally stops everything from showing up and getting banned, is this a good idea?.  For all I know, you could have suppressed a bunch of things that should not be.

      Listing what you suppressed would have been a better approach, I am going to avoid using this and attempt to build something that I have a clue about.

      Not knocking your work, but as mentioned, I have no idea what you're suppressing.

      PFSense System Specs.
      –---------------
      Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
      4 CPUs: 1 package(s) x 4 core(s) 4 port HP Branded Intel Ethernet Card

      1 Reply Last reply Reply Quote 0
      • ?
        Guest
        last edited by

        @deanot:

        The list is a good idea, BUT, we have no idea what is being suppressed.  At least I have no idea…..  Using this list literally stops everything from showing up and getting banned, is this a good idea?.  For all I know, you could have suppressed a bunch of things that should not be.

        Listing what you suppressed would have been a better approach, I am going to avoid using this and attempt to build something that I have a clue about.

        Not knocking your work, but as mentioned, I have no idea what you're suppressing.

        Thank you for pointing this out. I am a PFSense / snort newbie and just discovered this list. It improved the performance of snort, but I, too, am concerned about what it is actually doing since I am so new at this. A reply from somebody with experience would be beneficial.

        This week I plan to remove the list, at lease temporarily, and try to make my own suppression list. It will give me a frame of reference that may enable me to figure out the donated one better.

        1 Reply Last reply Reply Quote 0
        • ?
          Guest
          last edited by

          deanot,

          I removed the copied suppression list ans started building my own today. I'm using suppression only at this time because I'm still too new with snort and PFSense to try the rule fixes. That will come down the road in a couple of weeks.

          FYI: It appears to take detective work to figure out what can be suppressed. Just tedious detective work.

          For example, a 'corporate violation' appeared to be my home network doing something internally using IPv6. Seemed pretty safe to suppress. Also on the copied list.

          An IPv4 destination address pointed at Microsoft. Google said it was in use by a company that supplies an anti-malware product I use. I assumed it was talking back to the publisher. Coded as safe.

          I noted one before that ooma was involved with and also noted on the ooma 'ports to forward' list they publish. Allowed.

          This must reflect the suggestion to run 'detect only' for a couple of months first. Good luck.

          1 Reply Last reply Reply Quote 0
          • C
            cmenghi
            last edited by

            Hi, people.

            Im create a github repo with the list https://github.com/cristianmenghi/pfsense-snort/

            I have a problem that snort block my access to the webConfigurator, any advice ?

            thanks.

            1 Reply Last reply Reply Quote 0
            • S
              sebna
              last edited by

              @cmenghi:

              Hi, people.

              Im create a github repo with the list https://github.com/cristianmenghi/pfsense-snort/

              I have a problem that snort block my access to the webConfigurator, any advice ?

              thanks.

              I have exactly same problem using this list. Have you found lines / reason which are causing it? Otherwise list is great…

              Can anybody advice?

              1 Reply Last reply Reply Quote 0
              • A
                asterix
                last edited by

                Realized I had not posed my most recent suppression list. Found quiet a bit of new ones to add on the list after the recent upgrade to 2.3. I still see a few more false positives but they are not yet blocking anything critical.

                –------------------------------------------

                suppress gen_id 1, sig_id 536
                suppress gen_id 1, sig_id 648
                suppress gen_id 1, sig_id 653
                suppress gen_id 1, sig_id 1390
                suppress gen_id 1, sig_id 2452
                suppress gen_id 1, sig_id 8375
                suppress gen_id 1, sig_id 11192
                suppress gen_id 1, sig_id 12286
                suppress gen_id 1, sig_id 15147
                suppress gen_id 1, sig_id 15306
                suppress gen_id 1, sig_id 15362
                suppress gen_id 1, sig_id 16313
                suppress gen_id 1, sig_id 16482
                suppress gen_id 1, sig_id 17458
                suppress gen_id 1, sig_id 20583
                suppress gen_id 1, sig_id 23098
                suppress gen_id 1, sig_id 23256
                suppress gen_id 1, sig_id 24889
                suppress gen_id 1, sig_id 2000334
                suppress gen_id 1, sig_id 2000419
                suppress gen_id 1, sig_id 2003195
                suppress gen_id 1, sig_id 2007727
                suppress gen_id 1, sig_id 2008120
                suppress gen_id 1, sig_id 2008578
                suppress gen_id 1, sig_id 2010516
                suppress gen_id 1, sig_id 2010525
                suppress gen_id 1, sig_id 2010935
                suppress gen_id 1, sig_id 2010937
                suppress gen_id 1, sig_id 2011716
                suppress gen_id 1, sig_id 2012078
                suppress gen_id 1, sig_id 2012086
                suppress gen_id 1, sig_id 2012087
                suppress gen_id 1, sig_id 2012088
                suppress gen_id 1, sig_id 2012089
                suppress gen_id 1, sig_id 2012141
                suppress gen_id 1, sig_id 2012252
                suppress gen_id 1, sig_id 2012758
                suppress gen_id 1, sig_id 2013028
                suppress gen_id 1, sig_id 2013031
                suppress gen_id 1, sig_id 2013222
                suppress gen_id 1, sig_id 2013414
                suppress gen_id 1, sig_id 2013504
                suppress gen_id 1, sig_id 2014472
                suppress gen_id 1, sig_id 2014518
                suppress gen_id 1, sig_id 2014520
                suppress gen_id 1, sig_id 2014726
                suppress gen_id 1, sig_id 2014734
                suppress gen_id 1, sig_id 2014819
                suppress gen_id 1, sig_id 2015561
                suppress gen_id 1, sig_id 2015744
                suppress gen_id 1, sig_id 2016360
                suppress gen_id 1, sig_id 2016877
                suppress gen_id 1, sig_id 2017364
                suppress gen_id 1, sig_id 2018959
                suppress gen_id 1, sig_id 2019416
                suppress gen_id 1, sig_id 2100366
                suppress gen_id 1, sig_id 2100368
                suppress gen_id 1, sig_id 2100651
                suppress gen_id 1, sig_id 2101390
                suppress gen_id 1, sig_id 2101424
                suppress gen_id 1, sig_id 2102314
                suppress gen_id 1, sig_id 2103134
                suppress gen_id 1, sig_id 2103192
                suppress gen_id 1, sig_id 2402000
                suppress gen_id 1, sig_id 2403344
                suppress gen_id 1, sig_id 2406003
                suppress gen_id 1, sig_id 2406067
                suppress gen_id 1, sig_id 2406069
                suppress gen_id 1, sig_id 2406424
                suppress gen_id 1, sig_id 2500050
                suppress gen_id 1, sig_id 2500056
                suppress gen_id 1, sig_id 2520199
                suppress gen_id 1, sig_id 2520205
                suppress gen_id 1, sig_id 100000230
                suppress gen_id 3, sig_id 14772
                suppress gen_id 3, sig_id 19187
                suppress gen_id 3, sig_id 21355
                suppress gen_id 119, sig_id 2
                suppress gen_id 119, sig_id 4
                suppress gen_id 119, sig_id 7
                suppress gen_id 119, sig_id 14
                suppress gen_id 119, sig_id 31
                suppress gen_id 119, sig_id 32
                suppress gen_id 119, sig_id 33
                suppress gen_id 120, sig_id 2
                suppress gen_id 120, sig_id 3
                suppress gen_id 120, sig_id 4
                suppress gen_id 120, sig_id 6
                suppress gen_id 120, sig_id 8
                suppress gen_id 120, sig_id 9
                suppress gen_id 120, sig_id 10
                suppress gen_id 122, sig_id 19
                suppress gen_id 122, sig_id 21
                suppress gen_id 122, sig_id 22
                suppress gen_id 122, sig_id 23
                suppress gen_id 122, sig_id 26
                suppress gen_id 123, sig_id 10
                suppress gen_id 124, sig_id 3
                suppress gen_id 125, sig_id 2
                suppress gen_id 137, sig_id 1
                suppress gen_id 138, sig_id 2
                suppress gen_id 138, sig_id 3
                suppress gen_id 138, sig_id 4
                suppress gen_id 138, sig_id 5
                suppress gen_id 138, sig_id 6
                suppress gen_id 140, sig_id 27
                suppress gen_id 141, sig_id 1

                1 Reply Last reply Reply Quote 0
                • V
                  Vidmo
                  last edited by

                  For those who wish to know exactly what they are blocking and why, I present my list.

                  #GLOBAL

                  #This event is generated when an attempt is made to gain access to private resources using Samba
                  #suppress gen_id 1, sig_id 536

                  #GPL SHELLCODE x86 NOOP
                  #suppress gen_id 1, sig_id 648

                  #GPL SHELLCODE x86 0x90 unicode NOOP
                  #suppress gen_id 1, sig_id 653

                  #This set of instructions can be used as a NOOP to pad buffers on an x86 architecture machines.
                  suppress gen_id 1, sig_id 1390
                  suppress gen_id 1, sig_id 2452
                  suppress gen_id 1, sig_id 8375

                  #This event is generated when network traffic that indicates download of executable content is being used.
                  suppress gen_id 1, sig_id 11192

                  #This rule generates events when a portable executable file is downloaded
                  suppress gen_id 1, sig_id 15306

                  #FILE-IDENTIFY download of executable content - x-header -> stops windows download
                  suppress gen_id 1, sig_id 16313

                  #This event is generated when an attempt is made to exploit a known vulnerability in internet security.
                  suppress gen_id 1, sig_id 17458

                  #This event is generated when an attempt is made to exploit a known vulnerability in firefox.
                  suppress gen_id 1, sig_id 20583

                  #This event is generated when an attempt is made to exploit a known vulnerability in adobe air.
                  suppress gen_id 1, sig_id 23098

                  #GPL ICMP_INFO PING *NIX
                  suppress gen_id 1, sig_id 2100366

                  #GPL ICMP_INFO
                  suppress gen_id 1, sig_id 2100368

                  #GPL SHELLCODE x86 stealth NOOP
                  suppress gen_id 1, sig_id 2100651
                  suppress gen_id 1, sig_id 2101390

                  #GPL SHELLCODE x86 0xEB0C NOOP
                  suppress gen_id 1, sig_id 2101424
                  suppress gen_id 1, sig_id 2102314
                  suppress gen_id 1, sig_id 2103134
                  suppress gen_id 1, sig_id 2500056
                  suppress gen_id 1, sig_id 100000230

                  #GPL WEB_CLIENT PNG large colour depth download attempt
                  suppress gen_id 1, sig_id 2103134

                  #WEB-CLIENT libpng malformed chunk denial of service attempt
                  suppress gen_id 3, sig_id 14772

                  #(http_inspect) DOUBLE DECODING ATTACK
                  suppress gen_id 119, sig_id 2

                  #(http_inspect) BARE BYTE UNICODE ENCODING
                  suppress gen_id 119, sig_id 4

                  #(http_inspect) IIS UNICODE CODEPOINT ENCODING
                  suppress gen_id 119, sig_id 7

                  #(http_inspect) NON-RFC DEFINED CHAR [**]
                  suppress gen_id 119, sig_id 14

                  #(http_inspect) UNKNOWN METHOD
                  suppress gen_id 119, sig_id 31

                  #(http_inspect) SIMPLE REQUEST
                  suppress gen_id 119, sig_id 32

                  #(http_inspect) NO CONTENT-LENGTH OR TRANSFER-ENCODING IN HTTP RESPONSE
                  suppress gen_id 120, sig_id 2
                  suppress gen_id 120, sig_id 3

                  #(http_inspect) HTTP RESPONSE HAS UTF CHARSET WHICH FAILED TO NORMALIZE
                  suppress gen_id 120, sig_id 4

                  #(http_inspect) HTTP RESPONSE GZIP DECOMPRESSION FAILED
                  suppress gen_id 120, sig_id 6

                  #(http_inspect) INVALID CONTENT-LENGTH OR CHUNK SIZE
                  suppress gen_id 120, sig_id 8

                  #(http_inspect) JAVASCRIPT OBFUSCATION LEVELS EXCEEDS 1
                  suppress gen_id 120, sig_id 9

                  #(http_inspect) JAVASCRIPT WHITESPACES EXCEEDS MAX ALLOWED
                  suppress gen_id 120, sig_id 10

                  #(smtp) Attempted response buffer overflow: 1448 chars
                  suppress gen_id 124, sig_id 3

                  #(ftp_telnet) Invalid FTP Command
                  suppress gen_id 125, sig_id 2

                  #(ssp_ssl) Invalid Client HELLO after Server HELLO Detected
                  suppress gen_id 137, sig_id 1

                  #(IMAP) Unknown IMAP4 command
                  suppress gen_id 141, sig_id 1

                  #(http_inspect) UNESCAPED SPACE IN HTTP URI
                  suppress gen_id 119, sig_id 33

                  #ET P2P BitTorrent peer sync
                  suppress gen_id 1, sig_id 2000334

                  #ET P2P ThunderNetwork UDP Traffic (MS Azure)
                  suppress gen_id 1, sig_id 2009099, track by_dst, ip 23.99.86.92

                  #ET TFTP Outbound TFTP Read Request – VONAGE
                  suppress gen_id 1, sig_id 2008120

                  #ET CHAT Skype User-Agent detected
                  suppress gen_id 1, sig_id 2002157

                  #ET CHAT Skype VOIP Checking Version (Startup)
                  suppress gen_id 1, sig_id 2001595

                  #ET CHAT Suppressing all IRC alerts to the justin.tv / twitch.tv netblock 192.16.64.0/21, online game watching + irc chat service.
                  #'TROJAN IRC Private message on non-standard port',2000347
                  #'TROJAN IRC Nick change on non-standard port',2000345
                  #'TROJAN IRC Channel JOIN on non-standard port',2000348
                  suppress gen_id 1, sig_id 2000347, track by_dst, ip 192.16.64.0/21
                  suppress gen_id 1, sig_id 2000345, track by_dst, ip 192.16.64.0/21
                  suppress gen_id 1, sig_id 2000348, track by_dst, ip 192.16.64.0/21

                  #ET WEB_CLIENT Possible HTTP 403 XSS Attempt (External Source)
                  suppress gen_id 1, sig_id 2010516

                  #ET WEB_CLIENT PDF With Embedded File
                  suppress gen_id 1, sig_id 2011507, track by_src, ip 192.104.67.214

                  #ET WEB_CLIENT Possible HTTP 500 XSS Attempt (External Source) (EATON UPS SOFTWARE)
                  suppress gen_id 1, sig_id 2010525, track by_src, ip 40.143.173.102

                  #ET WEB_CLIENT Possible Microsoft Internet Explorer CSS Tags Remote Code Execution Attempt
                  suppress gen_id 1, sig_id 2011891

                  #ET INFO EXE - OSX Disk Image Download
                  suppress gen_id 1, sig_id 2014518

                  #ET INFO EXE - Served Attached HTTP
                  suppress gen_id 1, sig_id 2014520

                  #ET INFO Packed Executable Download
                  suppress gen_id 1, sig_id 2014819

                  #ET INFO Session Traversal Utilities for NAT (STUN Binding Request obsolete rfc 3489 CHANGE-REQUEST attribute change IP flag false change port flag true)
                  suppress gen_id 1, sig_id 2018904
                  suppress gen_id 1, sig_id 2018905
                  suppress gen_id 1, sig_id 2018906
                  suppress gen_id 1, sig_id 2018907

                  #ET INFO Session Traversal Utilities for NAT (STUN Binding Request)
                  suppress gen_id 1, sig_id 2016149
                  suppress gen_id 1, sig_id 2016150
                  suppress gen_id 1, sig_id 2018908

                  #ET INFO DYNAMIC_DNS Query to *.dyndns. Domain
                  suppress gen_id 1, sig_id 2012758

                  #ET INFO Suspicious Windows NT version 8 User-Agent
                  suppress gen_id 1, sig_id 2015821

                  #ET INFO Possible Phish - Saved Website Comment Observed
                  suppress gen_id 1, sig_id 2018334

                  #ET INFO .exe File requested over FTP
                  suppress gen_id 1, sig_id 2014906, track by_dst, ip 64.174.237.178

                  #ET INFO PDF Using CCITTFax Filter
                  suppress gen_id 1, sig_id 2015561

                  #ET INFO Possible Chrome Plugin install
                  suppress gen_id 1, sig_id 2016847, track by_src, ip 192.168.1.120

                  #ET POLICY Microsoft user-agent automated process response to automated request
                  suppress gen_id 1, sig_id 2012692

                  #ET POLICY External IP Lookup - checkip.dyndns.org
                  suppress gen_id 1, sig_id 2021378

                  #ET POLICY External IP Lookup ip-api.com
                  suppress gen_id 1, sig_id 2022082

                  #ET POLICY Possible IP Check api.ipify.org
                  suppress gen_id 1, sig_id 2019512

                  #ET POLICY DynDNS CheckIp External IP Address Server Response
                  suppress gen_id 1, sig_id 2014932

                  #ET POLICY User-Agent (NSIS_Inetc (Mozilla)) - Sometimes used by hostile installers
                  suppress gen_id 1, sig_id 2011227

                  #ET POLICY PE EXE or DLL Windows file download HTTP
                  suppress gen_id 1, sig_id 2018959

                  #ET POLICY Outgoing Basic Auth Base64 HTTP Password detected unencrypted (ESET NOD)
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 38.90.226.36
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 38.90.226.37
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 38.90.226.38
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 38.90.226.39
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 38.90.226.40
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.166.13
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.166.14
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.166.16
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.166.15
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.166.88
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.21
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.22
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.23
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.24
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.25
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.26
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.132
                  suppress gen_id 1, sig_id 2006380, track by_dst, ip 91.228.167.133

                  #ET POLICY PE EXE or DLL Windows file download HTTP (NVIDIA)
                  suppress gen_id 1, sig_id 2018959, track by_src, ip 8.36.113.133
                  suppress gen_id 1, sig_id 2018959, track by_src, ip 8.36.113.189
                  suppress gen_id 1, sig_id 2018959, track by_src, ip 8.36.120.225

                  #ET POLICY Executable served from Amazon S3
                  suppress gen_id 1, sig_id 2013414

                  #ET POLICY Pandora Usage
                  suppress gen_id 1, sig_id 2014997

                  #ET POLICY iTunes User Agent
                  suppress gen_id 1, sig_id 2002878

                  #ET POLICY SSLv3 outbound connection from client vulnerable to POODLE attack
                  suppress gen_id 1, sig_id 2019416

                  #ET POLICY Executable and linking format (ELF) file download
                  suppress gen_id 1, sig_id 2000418, track by_src, ip 64.174.237.178

                  #ET POLICY Vulnerable Java Version 1.8.x Detected
                  suppress gen_id 1, sig_id 2019401, track by_src, ip 192.168.1.101

                  #ET POLICY Kindle Fire Browser User-Agent Outbound
                  suppress gen_id 1, sig_id 2014095

                  #ET SHELLCODE Possible Call with No Offset TCP Shellcode (ESET NOD)
                  suppress gen_id 1, sig_id 2012086, track by_src, ip 91.228.167.87
                  suppress gen_id 1, sig_id 2012086, track by_src, ip 91.228.166.45
                  suppress gen_id 1, sig_id 2012086, track by_src, ip 38.90.226.11
                  suppress gen_id 1, sig_id 2012086, track by_src, ip 38.90.226.12
                  suppress gen_id 1, sig_id 2012086, track by_src, ip 38.90.226.13

                  #ET SHELLCODE Possible Call with No Offset UDP Shellcode (VOIP)
                  suppress gen_id 1, sig_id 2012087, track by_src, ip 74.201.99.62

                  #ET SHELLCODE Possible Call with No Offset TCP Shellcode
                  suppress gen_id 1, sig_id 2012086, track by_src, ip 64.174.237.178

                  1 Reply Last reply Reply Quote 1
                  • A
                    asterix
                    last edited by

                    After monitoring Snort for over 2 years, I am now confident on the suppression list doing no major harm to my network from outside attack. This week I moved the entire list (might have 1 or 2 more since my last post) to SID Mgmt, disablesid.conf on WAN (SID State Order: Disable Enable). This disables all the unneeded rules first before enabling the rest of the rules on Snort startup. Saves some CPU processing (don't expect miracles unless you are on P II/P III/P4 CPU). You wont see any difference on newer CPUs.

                    Here is the simpler list for disablesid.conf. Did a random check and found them disabled. No more suppression list for now.

                    1:536
                    1:648
                    1:653
                    1:1390
                    1:2452
                    1:8375
                    1:11192
                    1:12286
                    1:15147
                    1:15306
                    1:15362
                    1:16313
                    1:16482
                    1:17458
                    1:20583
                    1:23098
                    1:23256
                    1:24889
                    1:2000334
                    1:2000419
                    1:2003195
                    1:2007727
                    1:2008120
                    1:2008578
                    1:2010516
                    1:2010525
                    1:2010935
                    1:2010937
                    1:2011716
                    1:2012078
                    1:2012086-1:2012089
                    1:2012141
                    1:2012252
                    1:2012758
                    1:2013028
                    1:2013031
                    1:2013222
                    1:2013414
                    1:2013504
                    1:2014472
                    1:2014518
                    1:2014520
                    1:2014726
                    1:2014734
                    1:2014819
                    1:2015561
                    1:2015744
                    1:2015820
                    1:2016360
                    1:2016877
                    1:2017364
                    1:2018959
                    1:2019416
                    1:2022913
                    1:2100366
                    1:2100368
                    1:2100651
                    1:2101390
                    1:2101424
                    1:2102314
                    1:2103134
                    1:2103192
                    1:2402000
                    1:2403344
                    1:2406003
                    1:2406067
                    1:2406069
                    1:2406424
                    1:2500050
                    1:2500056
                    1:2520199
                    1:2520205
                    1:100000230
                    3:14772
                    3:19187
                    3:21355
                    119:2
                    119:4
                    119:7
                    119:14
                    119:31-119:33
                    120:2-120:4
                    120:6
                    120:8-120:10
                    122:19
                    122:21-122:23
                    122:26
                    123:10
                    124:3
                    125:2
                    137:1
                    138:2-138:6
                    141:1

                    1 Reply Last reply Reply Quote 0
                    • A
                      akishore
                      last edited by

                      Hi Asterix,

                      Thanks for the updated suppression list! It makes things work a lot better on my home network.

                      I noticed your last post says you moved the list over to SID Mgmt and stopped using the suppression list. Can you explain in detail how to do this? I'm a noob and I understood the whole suppression list and how to set it up, etc., but I have no idea what disablesid.conf is, where to edit it, etc.

                      Any help you could provide would be greatly appreciated.

                      Also why is using this method better than the suppression list?

                      Thanks!

                      1 Reply Last reply Reply Quote 0
                      • A
                        asterix
                        last edited by

                        @akishore:

                        Hi Asterix,

                        Thanks for the updated suppression list! It makes things work a lot better on my home network.

                        I noticed your last post says you moved the list over to SID Mgmt and stopped using the suppression list. Can you explain in detail how to do this? I'm a noob and I understood the whole suppression list and how to set it up, etc., but I have no idea what disablesid.conf is, where to edit it, etc.

                        Any help you could provide would be greatly appreciated.

                        See attached screenshot. Basically you go in SID Mgmt tab, enable "Enable Automatic SID State Management"and add/create a disabledsid.conf file. Once you have that added, go down below to the interface you are running Snort on (usually WAN) and reference the disabledsid.conf file under the Disable SID File column. SID State order should be "Disable,Enable"..so it will processing all the sids which are to be disabled first and then jump on to any specific sids you may have specified to be turned on using an enablesid.conf file (you can name the files what ever you feel like). Also ensure you go back to the WAN interface and remove the suppression list selected under "Alert Suppression and Filtering"  as you don't need it anymore. All your suppressed sids are now disabled to begin with so they will not be processed, hence no more alerts on them.

                        @akishore:

                        Also why is using this method better than the suppression list?

                        Thanks!

                        As I stated in the my previous post "This disables all the unneeded rules first before enabling the rest of the rules on Snort startup".. so Snort does not reference/process the disabled rules against the traffic saving some CPU time. Also since the rules are disabled before Snort starts, it saves some RAM and snort startup times are reduced…depending on how many rules you are loading and how many have been disabled of course.

                        In the case of suppression list, the rules are still being referenced/processed and the alerts being generated are just suppressed. So there is still activity in the background but since you set it up to ignore the alerts (suppress) they are not being shown in the logs.

                        SID.png
                        SID.png_thumb

                        1 Reply Last reply Reply Quote 0
                        • R
                          Ramosel
                          last edited by

                          @Asterix:

                          As I stated in the my previous post "This disables all the unneeded rules first before enabling the rest of the rules on Snort startup"..

                          Sweet,  doing a fresh load on new hardware so very timely too.

                          Thanks!

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                          • panzP
                            panz
                            last edited by

                            Thank you Asterix, well done!

                            I encountered only to "problems":

                            1. if I download a list, it contains a lot of html code (I'm using Firefox v. 50.1.0)

                            2. If I download all bunch of lists in gzip, the resulted file is corrupted (unpacking program: WinRAR v. 5.40 64-bit)

                            pfSense 2.3.2-RELEASE-p1 (amd64)
                            motherboard: MSI C847MS-E33 Micro ATX (with Intel Celeron CPU 847 @ 1.10 GHz) ~ PSU: Corsair VS350 ~ RAM: Kingston KVR1333D3E9S 4096 MB 240-pin DIMM DDR3 SDRAM 1.5 volt ~ NIC: Intel EXPI9301CTBLK (LAN) ~ NIC: D-Link DFE-528TX (CAM) ~ Hard Disk: Western Digital WD10JFCX Red ~ Case: Cooler Master HAF XB ~ power consumption: 21 Watts.

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                            • A
                              asterix
                              last edited by

                              @panz:

                              I encountered only to "problems":

                              1. if I download a list, it contains a lot of html code (I'm using Firefox v. 50.1.0)

                              2. If I download all bunch of lists in gzip, the resulted file is corrupted (unpacking program: WinRAR v. 5.40 64-bit)

                              Not sure what list you are referring to. If you mean the list above, just copy paste it directly into pfSense. https://forum.pfsense.org/index.php?topic=56267.msg665288#msg665288

                              On another note, after moving to Suricata a couple of days ago I am noticing more FPs which I first suppressed then moved to disablesid.conf. This may be due to the fact that I restructured my entire network from L2 to L3. So pfSense lan now acts just as a transit interface and is servicing clients outside its network (with the help of gateways and static routes).

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                              • panzP
                                panz
                                last edited by

                                I'm talking about the little icon that shows the description "download this SID mods list file"in the SID mgmt section: if you open the downloaded file it's not a text file

                                pfSense 2.3.2-RELEASE-p1 (amd64)
                                motherboard: MSI C847MS-E33 Micro ATX (with Intel Celeron CPU 847 @ 1.10 GHz) ~ PSU: Corsair VS350 ~ RAM: Kingston KVR1333D3E9S 4096 MB 240-pin DIMM DDR3 SDRAM 1.5 volt ~ NIC: Intel EXPI9301CTBLK (LAN) ~ NIC: D-Link DFE-528TX (CAM) ~ Hard Disk: Western Digital WD10JFCX Red ~ Case: Cooler Master HAF XB ~ power consumption: 21 Watts.

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                                • bmeeksB
                                  bmeeks
                                  last edited by

                                  @panz:

                                  I'm talking about the little icon that shows the description "download this SID mods list file"in the SID mgmt section: if you open the downloaded file it's not a text file

                                  This may a lingering bug from the Bootstrap conversion, or it might be peculiar to Firefox.  Have you another browser to try such as Chrome or Internet Explorer?  If it persists with other browsers, I will look at getting it fixed in the next Snort package update.

                                  In the meantime, you can download the files outside of the GUI using something like WinSCP on Windows to perform a secure copy (SSH) operation.  The files live in the /var/db/suricata/sidmods directory on the firewall.

                                  Bill

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                                  • panzP
                                    panz
                                    last edited by

                                    It's the same with Google Chrome; moreover the "Download" button (which is supposed to download all the lists in a single bzip file) generates a corrupted archive.

                                    pfSense 2.3.2-RELEASE-p1 (amd64)
                                    motherboard: MSI C847MS-E33 Micro ATX (with Intel Celeron CPU 847 @ 1.10 GHz) ~ PSU: Corsair VS350 ~ RAM: Kingston KVR1333D3E9S 4096 MB 240-pin DIMM DDR3 SDRAM 1.5 volt ~ NIC: Intel EXPI9301CTBLK (LAN) ~ NIC: D-Link DFE-528TX (CAM) ~ Hard Disk: Western Digital WD10JFCX Red ~ Case: Cooler Master HAF XB ~ power consumption: 21 Watts.

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                                    • D
                                      doktornotor Banned
                                      last edited by

                                      The download button seems to work normally here with Suricata at least. The individual files have HTML crap appended.

                                      @bmeeks: You might try something like this, I recall that was working pretty well: https://github.com/pfsense/pfsense-packages/blob/master/config/tftp2/tftp_files.php#L52

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                                      • bmeeksB
                                        bmeeks
                                        last edited by

                                        @doktornotor:

                                        The download button seems to work normally here with Suricata at least. The individual files have HTML crap appended.

                                        @bmeeks: You might try something like this, I recall that was working pretty well: https://github.com/pfsense/pfsense-packages/blob/master/config/tftp2/tftp_files.php#L52

                                        Thanks!  I will put looking into this problem on todo list for Snort.  This may be caused by some changes to the underlying web server in newer pfSense versions.  I have not touched that particular code in Snort for a very long time (well before the change in the web server engine on the firewall).

                                        Bill

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                                        • uptownVagrantU
                                          uptownVagrant
                                          last edited by

                                          I'm running into a strange issue when using a disablesid.conf file, contents included below, the SIDs are not being disabled, I still see them triggering alerts, and when I check the rules in the snort interface I see "{$textse}"; " preceding SIDs that were specified in servers-disablesid.conf.  See attachment

                                          I've tried removing all of the comments in the conf file and rebuilding without luck.  Has anyone else run into this?

                                          
# servers-disablesid.conf

# DELETED NETBIOS SMB D$ share access
1:536

# INDICATOR-SHELLCODE x86 NOOP
1:648

# DELETED SHELLCODE x86 0x90 unicode NOOP
1:653

# INDICATOR-SHELLCODE x86 inc ebx NOOP
1:1390

# POLICY-SOCIAL Yahoo IM ping
1:2452

# BROWSER-PLUGINS QuickTime Object ActiveX clsid access
1:8375

# FILE-EXECUTABLE download of executable content
1:11192

# FILE-OTHER PCRE character class heap buffer overflow attempt
1:12286

# BROWSER-IE Microsoft Internet Explorer malformed iframe buffer overflow attempt
1:15147

# FILE-EXECUTABLE Portable Executable binary file magic detected
1:15306

# INDICATOR-OBFUSCATION obfuscated javascript excessive fromCharCode - potential attack
1:15362

# FILE-EXECUTABLE download of executable content
1:16313

# BROWSER-IE Microsoft Internet Explorer userdata behavior memory corruption attempt
1:16482

# FILE-OTHER BitDefender Internet Security script code execution attempt
1:17458

# BROWSER-FIREFOX Mozilla multiple location headers malicious redirect attempt
1:20583

# FILE-MULTIMEDIA Adobe Flash Player MP4 sequence parameter set parsing overflow attempt
1:23098

# FILE-EXECUTABLE Armadillo v1.71 packer file magic detected
1:23256

# FILE-FLASH Adobe Flash Player Action InitArray stack overflow attempt
1:24889

# ET P2P BitTorrent peer sync
1:2000334

# ET POLICY PE EXE or DLL Windows file download
1:2000419

# ET POLICY Unusual number of DNS No Such Name Responses
1:2003195

# ET P2P possible torrent download
1:2007727

# ET TFTP Outbound TFTP Read Request
1:2008120

# ET SCAN Sipvicious Scan
1:2008578

# ET WEB_CLIENT Possible HTTP 403 XSS Attempt (External Source)
1:2010516

# ET WEB_CLIENT Possible HTTP 500 XSS Attempt (External Source)
1:2010525

# ET POLICY Suspicious inbound to MSSQL port 1433
1:2010935

# ET POLICY Suspicious inbound to mySQL port 3306
1:2010937

# ET SCAN Sipvicious User-Agent Detected (friendly-scanner)
1:2011716

# ET POLICY Windows-Based OpenSSL Tunnel Outbound
1:2012078

# ET DELETED Possible Call with No Offset TCP Shellcode
1:2012086

# ET SHELLCODE Possible Call with No Offset UDP Shellcode
1:2012087

# ET SHELLCODE Possible Call with No Offset TCP Shellcode
1:2012088

# ET SHELLCODE Possible Call with No Offset UDP Shellcode
1:2012089

# ET POLICY Protocol 41 IPv6 encapsulation potential 6in4 IPv6 tunnel active
1:2012141

# ET SHELLCODE Common 0a0a0a0a Heap Spray String
1:2012252

# ET INFO DYNAMIC_DNS Query to *.dyndns. Domain
1:2012758

# ET POLICY curl User-Agent Outbound
1:2013028

# ET POLICY Python-urllib/ Suspicious User Agent
1:2013031

# ET DELETED Excessive Use of HeapLib Objects Likely Malicious Heap Spray Attempt
1:2013222

# ET POLICY Executable served from Amazon S3
1:2013414

# ET POLICY GNU/Linux APT User-Agent Outbound likely related to package management
1:2013504

# ET INFO JAVA - Java Archive Download
1:2014472

# ET INFO EXE - OSX Disk Image Download
1:2014518

# ET INFO EXE - Served Attached HTTP
1:2014520

# ET POLICY Outdated Windows Flash Version IE
1:2014726

# ET P2P BitTorrent - Torrent File Downloaded
1:2014734

# ET INFO Packed Executable Download
1:2014819

# ET INFO PDF Using CCITTFax Filter
1:2015561

# ET INFO EXE IsDebuggerPresent (Used in Malware Anti-Debugging)
1:2015744

# ET INFO Suspicious Windows NT version 7 User-Agent
1:2015820

# ET INFO JAVA - ClassID
1:2016360

# ET POLICY Unsupported/Fake FireFox Version 2.
1:2016877

# ET INFO SUSPCIOUS Non-standard base64 charset used for encoding
1:2017364

# ET POLICY PE EXE or DLL Windows file download HTTP
1:2018959

# ET POLICY SSLv3 outbound connection from client vulnerable to POODLE attack
1:2019416

# ET INFO WinHttp AutoProxy Request wpad.dat Possible BadTunnel
1:2022913

# NOT FOUND IN RULES
1:2100366
1:2100368
1:2100651
1:2101390
1:2101424
1:2102314
1:2103134
1:2103192

# ET DROP Dshield Block Listed Source group 1
1:2402000

# ET CINS Active Threat Intelligence Poor Reputation IP TCP group 23
1:2403344

# NOT FOUND IN RULES
1:2406003
1:2406067
1:2406069
1:2406424

# ET COMPROMISED Known Compromised or Hostile Host Traffic TCP group 26
1:2500050

# ET COMPROMISED Known Compromised or Hostile Host Traffic TCP group 29
1:2500056

# NOT FOUND IN RULES
1:2520199
1:2520205
1:100000230

# FILE-IMAGE libpng malformed chunk denial of service attempt
3:14772

# PROTOCOL-DNS TMG Firewall Client long host entry exploit attempt
3:19187

# PROTOCOL-DNS potential dns cache poisoning attempt - mismatched txid
3:21355

# HI_CLIENT_DOUBLE_DECODE
119:2

# HI_CLIENT_BARE_BYTE
119:4

# HI_CLIENT_IIS_UNICODE
119:7

# HI_CLIENT_NON_RFC_CHAR
119:14

# HI_CLIENT_UNKNOWN_METHOD
119:31

# HI_CLIENT_SIMPLE_REQUEST
119:32

# HI_CLIENT_UNESCAPED_SPACE_IN_URI
119:33

# HI_SERVER_INVALID_STATCODE
120:2

# HI_SERVER_NO_CONTLEN
120:3

# HI_SERVER_UTF_NORM_FAIL
120:4

# HI_SERVER_DECOMPR_FAILED
120:6

# HI_CLISRV_MSG_SIZE_EXCEPTION
120:8

# HI_SERVER_JS_OBFUSCATION_EXCD
120:9

# HI_SERVER_JS_EXCESS_WS
120:10

# HI_SERVER_JS_EXCESS_WS
122:19

# PSNG_UDP_FILTERED_PORTSCAN
122:21

# PSNG_UDP_FILTERED_DECOY_PORTSCAN
122:22

#PSNG_UDP_PORTSWEEP_FILTERED
122:23

# PSNG_ICMP_PORTSWEEP_FILTERED
122:26

# FRAG3_IPV6_BAD_FRAG_PKT
123:10

# SMTP_RESPONSE_OVERFLOW
124:3

# FTPP_FTP_INVALID_CMD
125:2

# SSL_INVALID_CLIENT_HELLO
137:1

# NOT FOUND IN RULES
138:2
138:3
138:4
138:5
138:6

# IMAP_UNKNOWN_CMD
141:1

                                          servers-sid-mgmt.png
                                          servers-sid-mgmt.png_thumb
                                          rule-strangeness.png
                                          rule-strangeness.png_thumb

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                                          • panzP
                                            panz
                                            last edited by

                                            I encountered a similar problem with SID Mgmt: it is not disabling rules # 2000419 and # 2018959 (ET POLICY PE EXE or DLL Windows file download); I had to exclude them manually.

                                            pfSense 2.3.2-RELEASE-p1 (amd64)
                                            motherboard: MSI C847MS-E33 Micro ATX (with Intel Celeron CPU 847 @ 1.10 GHz) ~ PSU: Corsair VS350 ~ RAM: Kingston KVR1333D3E9S 4096 MB 240-pin DIMM DDR3 SDRAM 1.5 volt ~ NIC: Intel EXPI9301CTBLK (LAN) ~ NIC: D-Link DFE-528TX (CAM) ~ Hard Disk: Western Digital WD10JFCX Red ~ Case: Cooler Master HAF XB ~ power consumption: 21 Watts.

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