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    Pfsense blocking all but pings to IP addresses

    Scheduled Pinned Locked Moved Problems Installing or Upgrading pfSense Software
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    • D Offline
      deajan
      last edited by

      Can you post a quick network schema + firewall rules ?

      NetPOWER.fr - some opensource stuff for IT people

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      • KOMK Offline
        KOM
        last edited by

        Yes, nobody can help you without seeing your LAN configuration and firewall rules.

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        • B Offline
          borgotech
          last edited by

          Your DNS Forwarder is enabled ?

          dnd.png
          dnd.png_thumb

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          • KOMK Offline
            KOM
            last edited by

            Resolver is the default in 2.3, not Forwarder.  Resolver can also work as a forwarder if you check its checkbox.

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            • D Offline
              d4t4str34m
              last edited by

              Here are some notes that I took while poking around trying to figure something out:

              Interface status on WAN
              In out error 0/39
              Collisions 2499

              Pinging by name from firewall diagnostic but not from laptop.

              What is the best way to get the lan and firewall rules configurations off the firewall and uploaded here?

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              • johnpozJ Online
                johnpoz LAYER 8 Global Moderator
                last edited by

                simple screenshot..

                example

                lanrules.jpg
                lanrules.jpg_thumb

                An intelligent man is sometimes forced to be drunk to spend time with his fools
                If you get confused: Listen to the Music Play
                Please don't Chat/PM me for help, unless mod related
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                • D Offline
                  d4t4str34m
                  last edited by

                  Lol, easy enough. Should be attached below.

                  lan-config.PNG
                  lan-config.PNG_thumb
                  lan-rules.PNG
                  lan-rules.PNG_thumb

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                  • KOMK Offline
                    KOM
                    last edited by

                    Those 5 rules you added are useless since all traffic is handled by the Default Allow LAN to Any rules at the bottom.  Nothing in your rules should be interfering with LAN traffic since they're all allow rules.  A default install of pfSense blocks all from WAN and blocks nothing from LAN, so your LAN clients should literally be able to do anything.  Can you post a screen of System - General Setup?

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                    • D Offline
                      d4t4str34m
                      last edited by

                      I want to lock it down so I will disable the default allow rule. I want to get it working first though before I mess around with that.

                      general.PNG
                      general.PNG_thumb

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                      • KOMK Offline
                        KOM
                        last edited by

                        I want to lock it down so I will disable the default allow rule. I want to get it working first though before I mess around with that.

                        That's actually the opposite of how you should work on this.  Keep the default Allow All on LAN rules.  Get rid of your custom rules.  Get everything working that you need to get working, then start locking down if that's what you need to do.  Unless you're living with criminals, locking down LAN can be a real exercise in pain.

                        When I try those DNS servers you have listed, they both fail to resolve anything for me but this might be a security issue.  What happens if you replace them with 8.8.8.8, 8.8.4.4?  Are you using the pfSense DNS Resolver or Forwarder?

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                        • D Offline
                          deajan
                          last edited by

                          Yep, google dns (8.8.8.4 & 8.8.4.4) or opendns (208.67.222.123 & 208.67.220.123).
                          Also, affect those DNS to a gateway.

                          Connect to your pfSense box via ssh and try

                          
nslookup www.google.com

                          What's the output ?

                          NetPOWER.fr - some opensource stuff for IT people

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                          • D Offline
                            d4t4str34m
                            last edited by

                            I have tried with DNS forwarder enabled and disabled. Results from nslookup using both sets of DNS numbers is below. I also used the ping utility on pfsense and that is below as well. It hits outside IP addresses fine but the only name it hit was google.com. Wouldn't get a reply from cnn.com. I have also attached a screenshot of some of my firewall log.

                            Server: 207.28.65.6
                            Address: 207.28.65.6#53

                            Non-authoritative answer:
                            Name: www.google.com
                            Address: 209.56.124.176
                            Name: www.google.com
                            Address: 209.56.124.166
                            Name: www.google.com
                            Address: 209.56.124.154
                            Name: www.google.com
                            Address: 209.56.124.177
                            Name: www.google.com
                            Address: 209.56.124.163
                            Name: www.google.com
                            Address: 209.56.124.170
                            Name: www.google.com
                            Address: 209.56.124.165
                            Name: www.google.com
                            Address: 209.56.124.144
                            Name: www.google.com
                            Address: 209.56.124.181
                            Name: www.google.com
                            Address: 209.56.124.148
                            Name: www.google.com
                            Address: 209.56.124.185
                            Name: www.google.com
                            Address: 209.56.124.152
                            Name: www.google.com
                            Address: 209.56.124.174
                            Name: www.google.com
                            Address: 209.56.124.187
                            Name: www.google.com
                            Address: 209.56.124.159
                            Name: www.google.com
                            Address: 209.56.124.155

                            Server: 8.8.8.8
                            Address: 8.8.8.8#53

                            Non-authoritative answer:
                            Name: www.google.com
                            Address: 209.56.124.185
                            Name: www.google.com
                            Address: 209.56.124.155
                            Name: www.google.com
                            Address: 209.56.124.166
                            Name: www.google.com
                            Address: 209.56.124.165
                            Name: www.google.com
                            Address: 209.56.124.170
                            Name: www.google.com
                            Address: 209.56.124.177
                            Name: www.google.com
                            Address: 209.56.124.144
                            Name: www.google.com
                            Address: 209.56.124.148
                            Name: www.google.com
                            Address: 209.56.124.187
                            Name: www.google.com
                            Address: 209.56.124.174
                            Name: www.google.com
                            Address: 209.56.124.176
                            Name: www.google.com
                            Address: 209.56.124.159
                            Name: www.google.com
                            Address: 209.56.124.163
                            Name: www.google.com
                            Address: 209.56.124.154
                            Name: www.google.com
                            Address: 209.56.124.152
                            Name: www.google.com
                            Address: 209.56.124.181

                            PING google.com (209.56.124.159): 56 data bytes
                            64 bytes from 209.56.124.159: icmp_seq=0 ttl=61 time=8.028 ms
                            64 bytes from 209.56.124.159: icmp_seq=1 ttl=61 time=7.957 ms
                            64 bytes from 209.56.124.159: icmp_seq=2 ttl=61 time=8.001 ms

                            –- google.com ping statistics ---
                            3 packets transmitted, 3 packets received, 0.0% packet loss
                            round-trip min/avg/max/stddev = 7.957/7.995/8.028/0.029 ms

                            PING cnn.com (157.166.226.26): 56 data bytes

                            --- cnn.com ping statistics ---
                            3 packets transmitted, 0 packets received, 100.0% packet loss

                            firewall-log.png
                            firewall-log.png_thumb

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                            • KOMK Offline
                              KOM
                              last edited by

                              I was asking if you could replace your DNS servers in System - General Setup with the Google ones.

                              I have tried with DNS forwarder enabled and disabled.

                              pfSense has two built-in DNS services.  I was asking which one you are using.  You shouldn't use both simultaneously.  If you are using DNS Forwarder only and you turn it off then you have no DNS at all.

                              Here is what I would do:

                              • Disable DNS Forwarder.

                              • Enable DNS Resolver.

                              • Check the DNS Query Forwarding checkbox under Services - DNS Resolver - General settings.

                              • Replace your DNS servers under System - General Setup - DNS Server Settings with Google 8.8.8.8 and 8.8.4.4.

                              • Save & test.

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                              • johnpozJ Online
                                johnpoz LAYER 8 Global Moderator
                                last edited by

                                is this pfsense virtual?

                                Your blocks are OUT of state blocks.. not blocking of syn packets..  Do you have asymmetrical routing issue.  How are you clients connect to pfsense.. And they use pfsense as their only gateway right??

                                An intelligent man is sometimes forced to be drunk to spend time with his fools
                                If you get confused: Listen to the Music Play
                                Please don't Chat/PM me for help, unless mod related
                                SG-4860 25.07.1 | Lab VMs 2.8, 25.07.1

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                                • D Offline
                                  d4t4str34m
                                  last edited by

                                  Here is what I would do:
                                  Disable DNS Forwarder.
                                  Enable DNS Resolver.
                                  Check the DNS Query Forwarding checkbox under Services - DNS Resolver - General settings.
                                  Replace your DNS servers under System - General Setup - DNS Server Settings with Google 8.8.8.8 and 8.8.4.4.
                                  Save & test.

                                  Tried the DNS resolver and it didn't work. I have changed the dns numbers in the general setup and that didn't work.

                                  is this pfsense virtual?

                                  Your blocks are OUT of state blocks.. not blocking of syn packets..  Do you have asymmetrical routing issue.  How are you clients connect to pfsense.. And they use pfsense as their only gateway right??

                                  It is the pfsense appliance. It is not virtual. The pfsense box is the only gateway. As soon as I unplug pfsense and hook up the old cipa firewall everything works. It has the dns numbers in it that I have given you.

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                                  • D Offline
                                    d4t4str34m
                                    last edited by

                                    For some reason when I plug my pfsense box in, it is doing something to my dns server. I have to manually put a dns address into client machine settings to get dns working and get them on the internet. Machines are getting ip settings properly from my dhcp server but the dns is not working. The dhcp and dns reside on the same server.

                                    I just noticed that pfsense works as a dns fine if I put that in my dhcp server to hand out.

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                                    • P Offline
                                      phil.davis
                                      last edited by

                                      I just noticed that pfsense works as a dns fine if I put that in my dhcp server to hand out

                                      Well then, pfSense is good.
                                      If you have an internal DNS server, and the gateway address of your pfSense LAN side is not the same as the LAN side gateway address of the previous router, then you will have to tell that internal DNS server what is the new way to get to the internet (and thus to resolve external DNS). Once that is working, then your internal DHCP server should be able to give out the internal DNS server IP, and the internal DNS server will successfully lookup all names.

                                      (I am guessing a bit about what exactly you have on your internal network and how it all talked before putting pfSense in place)

                                      As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
                                      If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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                                      • D Offline
                                        d4t4str34m
                                        last edited by

                                        If you have an internal DNS server, and the gateway address of your pfSense LAN side is not the same as the LAN side gateway address of the previous router, then you will have to tell that internal DNS server what is the new way to get to the internet (and thus to resolve external DNS).

                                        I have it all set up with the same addresses as the last firewall so nothing should have changed. I had a rule for tcp/udp port 53 open for all and I figured that would allow my internal DNS to get DNS info from the net. I disabled all my rules to try and figure out what the issue was. I will start re-enabling them tomorrow and see if I can figure out what is causing the problem.

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                                        • D Offline
                                          d4t4str34m
                                          last edited by

                                          So now the issue is my internal DNS server is not getting out. I can ping the IP of the firewall, LAN IP and WAN IP. I cannot ping the WAN gateway IP. I can from the other machines on the network. I cannot figure out why the Mac OD servers are having so many issues.

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                                          • T Offline
                                            tim.mcmanus
                                            last edited by

                                            @d4t4str34m:

                                            So now the issue is my internal DNS server is not getting out. I can ping the IP of the firewall, LAN IP and WAN IP. I cannot ping the WAN gateway IP. I can from the other machines on the network. I cannot figure out why the Mac OD servers are having so many issues.

                                            Are you running MacOS X Server and using that as a DNS server?

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