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    MS FTP on DMZ not working for WAN Access

    NAT
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    • H
      hoba
      last edited by

      yes  :)

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      • T
        timb0311
        last edited by

        Ok here is another update.  Seems there is still a problem.

        I had a friend test the ftp from the command line who is physically outside the my network…. meaning has to cross the wan.  And it would not work.

        My test were showing I could connect to the FTP server on the DMZ via public address (and host name), but I was physically sitting on my LAN network during the test.

        In incremental steps I have tried:

        1.  To uncheck the ftp helper on the WAN... I don't think this really does anything but cause the ftp proxy to run... which requires a reboot.  And anyway it is already running from the intial test above. No good.

        2. Re-create the NAT port forward rules with default firewall rules.  No good.

        My friend tries to open via... ftp>open ftp.mydomain.com.  And replies back connected to ftp.  No rquest for login (does not allow anon conn).  And freezes the command line promt.  No physical connection to the FTP Server.

        Ok, I am stuck on this one.. can someone shed some light on what needs to be done to get through the WAN to the DMZ?

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        • T
          timb0311
          last edited by

          Ok… anyone?  Really need to get this working.

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          • T
            timb0311
            last edited by

            Tried re-installing the latest build from scratch and reconfiguring.  Still doesn't work.

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            • S
              sullrich
              last edited by

              It works fine here, honestly…  Make sure your not using a proxy arp type interface.  Also refer to the faq entries in faq.pfsense.com pertaining to ftp.

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              • T
                timb0311
                last edited by

                @sullrich:

                It works fine here, honestly…   Make sure your not using a proxy arp type interface.  Also refer to the faq entries in faq.pfsense.com pertaining to ftp.

                How do I … "Make sure your not using a proxy arp type interface"?  I am not a big network guru, so I am not sure how to do this.  Thanks.

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                • S
                  sullrich
                  last edited by

                  Proxy arp type entry for Virtual IP's.

                  Also ensure that your helper is enabled on Interfaces -> WAN.

                  Delete all firewall rules and nat rules pertaining to this connection and readd the ftp rules.  Leave the 2 rules intact.

                  Ensure that both rules have correct values set.  I fixed a bug where it was not specifying the interface ip address correctly in one of the firewall rules that are automatically added.

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                  • T
                    timb0311
                    last edited by

                    Still can get working…

                    Proxy arp type entry for Virtual IP's.
                    Not using Virtual Ips.. only WAN Interface Ip

                    Also ensure that your helper is enabled on Interfaces -> WAN.
                    helper is enabled on WAN interface only

                    Delete all firewall rules and nat rules pertaining to this connection and readd the ftp rules.  Leave the 2 rules intact.
                    Deleted the ftp Nat/FW Rules and added back both Nat/FW Rules

                    Ensure that both rules have correct values set.  I fixed a bug where it was not specifying the interface ip address correctly in one of the firewall rules that are automatically added.

                    Nat Rule shows:
                    WAN  TCP  21 (FTP)  10.0.x.180 (ext.: xx.xx.xx.16)  21 (FTP)  WAN –> FTP Server

                    FW Rules show:

                    TCP  *  *  10.0.x.180  21 (FTP)  *  NAT WAN --> FTP Server     
                    TCP  *  *  [blank]  21 (FTP)  *  NAT WAN –> FTP Server

                    Also:
                    $ ps awux | grep pftpx
                    proxy    633  0.0  0.2   656   412  ??  Ss    8:38PM   0:00.00 /usr/local/sbin/pftpx -f 10.0.x.180 -b xx.xx.xx.16 -c 21 -g 21
                    proxy    775  0.0  0.2   656   444  ??  Ss    8:38PM   0:00.00 /usr/local/sbin/pftpx -c 8021 -g 8021 192.168.x.1

                    $ pfctl -s rules | grep ftp
                    anchor "ftpsesame/" all
                    pass in quick on sis2 inet proto tcp from any to 127.0.0.1 port = ftp keep state label "FTP PROXY: Allow traffic to localhost"
                    anchor "ftpproxy" all
                    anchor "pftpx/                    " all
                    pass in quick on sis1 inet proto tcp from any to 127.0.0.1 port = ftp-proxy keep state label "FTP PROXY: Allow traffic to localhost"
                    pass in quick on sis1 inet proto tcp from any to 127.0.0.1 port = ftp keep state label "FTP PROXY: Allow traffic to localhost"
                    pass in quick on sis0 inet proto tcp from any port = ftp-data to (sis0) port > 49000 user = 62 flags S/SA keep state label "FTP PROXY: PASV mode data connection"
                    pass in quick on sis0 inet proto tcp from any to 10.0.x.180 port = ftp keep state label "USER_RULE: NAT WAN --> FTP Server"
                    pass in quick on sis0 proto tcp from any to any port = ftp flags S/SA keep state label "USER_RULE: NAT WAN --> FTP Server"

                    Does this look correct?  Any ideas?  Thanks.

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                    • S
                      sullrich
                      last edited by

                      TCP  *  *  [blank]  21 (FTP)  *  NAT WAN –> FTP Server

                      That is wrong.

                      Please run:

                      cat /etc/inc/filter.inc | grep Id

                      From a shell and report back.

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                      • S
                        sullrich
                        last edited by

                        Actually, I forgot to include the files in the upgrade.  ::)

                        Please upgrade.  Start from the last version you installed.

                        fetch -q -o - http://www.pfsense.com/~sullrich/update_to_rc2a.sh | sh -
                        fetch -q -o - http://www.pfsense.com/~sullrich/update_to_rc2b.sh | sh -
                        fetch -q -o - http://www.pfsense.com/~sullrich/update_to_rc2c.sh | sh -
                        fetch -q -o - http://www.pfsense.com/~sullrich/update_to_rc2d.sh | sh -
                        fetch -q -o - http://www.pfsense.com/~sullrich/update_to_rc2e.sh | sh -
                        fetch -q -o - http://www.pfsense.com/~sullrich/update_to_rc2f.sh | sh -
                        fetch -q -o - http://www.pfsense.com/~sullrich/update_to_rc2g.sh | sh -

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                        • T
                          timb0311
                          last edited by

                          Ok ran updates… then applied nat/rules, still not working... see below:

                          cat /etc/inc/filter.inc | grep Id
                          /* $Id: filter.inc,v 1.575.2.234 2006/08/23 20:19:18 sullrich Exp $ */

                          ps awux | grep pftpx
                          proxy    633  0.0  0.2   656   412  ??  Ss    8:38PM   0:00.00 /usr/local/sbin/pftpx -f 10.0.x.180 -b xx.xx.xx.16 -c 21 -g 21
                          proxy    775  0.0  0.2   656   444  ??  Ss    8:38PM   0:00.00 /usr/local/sbin/pftpx -c 8021 -g 8021 192.168.x.1

                          $ pfctl -s rules | grep ftp
                          anchor "ftpsesame/" all
                          pass in quick on sis2 inet proto tcp from any to 127.0.0.1 port = ftp keep state label "FTP PROXY: Allow traffic to localhost"
                          anchor "ftpproxy" all
                          anchor "pftpx/                          " all
                          pass in quick on sis1 inet proto tcp from any to 127.0.0.1 port = ftp-proxy keep state label "FTP PROXY: Allow traffic to localhost"
                          pass in quick on sis1 inet proto tcp from any to 127.0.0.1 port = ftp keep state label "FTP PROXY: Allow traffic to localhost"
                          pass in quick on sis0 inet proto tcp from any port = ftp-data to (sis0) port > 49000 user = 62 flags S/SA keep state label "FTP PROXY: PASV mode data connection"
                          pass in quick on sis0 inet proto tcp from any to 10.0.x.180 port = ftp keep state label "USER_RULE: NAT WAN --> FTP Server"
                          pass in quick on sis0 inet proto tcp from any to xx.xx.xx.16 port = ftp keep state label "USER_RULE: NAT WAN --> FTP Server"

                          Debug info from SmartFTP client:

                          [22:33:03] SmartFTP v2.0.997.4
                          [22:33:03] Resolving host name "ftp.mydomain.com"
                          [22:33:03] Connecting to xx.xx.xx.16 Port: 21
                          [22:33:03] Connected to ftp.mydomain.com.
                          [22:33:03] 220-Microsoft FTP Service
                          [22:33:04] 220 WARNING: You must have authorization to access this system. All connections are logged and monitored.
                          [22:33:04] USER myuser
                          [22:33:04] 331 Password required for myuser.
                          [22:33:04] PASS (hidden)
                          [22:33:04] 230 User myuser logged in.
                          [22:33:04] SYST
                          [22:33:06] 215 Windows_NT
                          [22:33:06] Detected Server Type: Windows NT
                          [22:33:06] FEAT
                          [22:33:06] 211-FEAT
                          [22:33:06]     SIZE
                          [22:33:06]     MDTM
                          [22:33:06] 211 END
                          [22:33:06] TYPE I
                          [22:33:06] 200 Type set to I.
                          [22:33:06] REST 0
                          [22:33:06] 350 Restarting at 0.
                          [22:33:06] PWD
                          [22:33:06] 257 "/" is current directory.
                          [22:33:06] TYPE A
                          [22:33:06] 200 Type set to A.
                          [22:33:06] PORT 10,0,x,180,12,203

                          [22:33:06] 500 Invalid PORT Command.        <–- Errors out here trying active mode... then switches to passive

                          [22:33:06] Automatic failover of data connection mode from "Active Mode (PORT)" to "Passive Mode (PASV)".

                          [22:33:06] PASV
                          [22:33:06] 227 Entering Passive Mode (10,0,x,180,191,108).
                          [22:33:06] Opening data connection to 10,0,x,180 Port: 49004

                          [22:33:06] LIST -aL                                   <–- Errors out here ... forces server to close connection

                          [22:33:06] 0 bytes transferred. (N/A/s) (0 ms)
                          [22:33:06] 426 Connection closed; transfer aborted.
                          [22:33:26] An established connection was aborted by the software in your host machine.
                          [22:33:26] Server closed connection

                          DEBUG from MS FTP command line:

                          ftp> debug
                          Debugging On .
                          ftp> open ftp.mydomain.com
                          Connected to ftp.mydomain.com.
                          220-Microsoft FTP Service
                          220 WARNING: You must have authorization to access….
                          User (ftp.mydomaind.com:(none)): myuser
                          ---> USER myuser
                          331 Password required for myuser.
                          Password:
                          ---> PASS mypwd
                          230 User myuser logged in.
                          ftp> dir
                          ---> PORT 10,0,x,180,13,3
                          500 Invalid PORT Command.
                          ---> LIST
                          150 Opening ASCII mode data connection for /bin/ls.         <--- command line freezes here...

                          Both test scenarios the server shows logged in, but neither will let you run commands.  Can't list directory, Can't push data to server... nor pull data from server.  Which tells me there is something wrong with the passive ports across the firewall.  I can't even do it across the LAN anymore while the nat/firewall rules in place.

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                          • S
                            sullrich
                            last edited by

                            Please show the firewall rules summary view that you showed before that contained the "blank" entry

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                            • T
                              timb0311
                              last edited by

                              Current Firewall rules after patches:

                              TCP  *  *  10.0.x.180 21 (FTP)  *  NAT WAN –> FTP Server     
                              TCP  *  *  WAN address  21 (FTP)  *  NAT WAN --> FTP Server

                              I just tried removing the NAT Port forward... thinking that it makes no sense since the proxy would be doing the forwarding.  Is this a correct assumption?

                              Anywaym after that I could LIST the directory information from  the LAN now.

                              Still need to test from outside... have to get someone to test this for me.

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                              • T
                                timb0311
                                last edited by

                                Ok tested externally and all is working after the NAT rule is deleted!  Thanks.

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