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    Nat reflection and udp

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    • A
      aldo
      last edited by

      synced my dev build just now and rebuilt diff attached

      diff2-filter.inc.txt

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      • S
        sullrich
        last edited by

        Thanks, I've commited a slightly different version.

        $rule['protocol'] should be used instead of the hard coded udp value since that case can trip for tcp or udp.

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        • A
          aldo
          last edited by

          ok will test this case for you
          thanks for wasting all that time scott i know what to do next time

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          • A
            aldo
            last edited by

            THE BAD NEWS ON REFLECTION

            ##########################
            TEST WITH SCOTTS COMMITED  FILTER.INC
            ##########################

            #######
            TEST1
            udp rule
            ########

            NAT Inbound Redirects

            rdr on vlan1 proto udp from any to 192.168.50.254 port { 161 } -> 10.250.100.129

            Reflection redirects

            rdr on $lan proto udp from any to 192.168.50.254 port { 161 } -> 127.0.0.1 port 19000

            NAT Reflection rules

            pass in quick on $lan inet proto udp from any to $loopback port 19000 keep state label "NAT REFLECT: Allow traffic to localhost"

            Inetd conf
            19000  stream  udp    nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 161

            ##########
            TEST 2
            tcp rules
            ##########

            NAT Inbound Redirects

            rdr on vlan1 proto tcp from any to 192.168.50.254 port { 80 } -> 10.250.100.129

            Reflection redirects

            rdr on $lan proto tcp from any to 192.168.50.254 port { 80 } -> 127.0.0.1 port 19002

            NAT Reflection rules

            pass in quick on $lan inet proto udp from any to $loopback port 19001 keep state label "NAT REFLECT: Allow traffic to localhost"

            Inetd conf
            19002  stream  tcp    nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 80

            ############
            TEST3
            tcp - udp rule
            ############

            NAT Inbound Redirects

            rdr on vlan1 proto { tcp udp } from any to 192.168.50.254 port { 123 } -> 10.250.100.129

            Reflection redirects

            rdr on $lan proto { tcp udp } from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19004

            NAT Reflection rules

            pass in quick on $lan inet proto tcp from any to $loopback port 19002 keep state label "NAT REFLECT: Allow traffic to localhost"
            pass in quick on $lan inet proto udp from any to $loopback port 19002 keep state label "NAT REFLECT: Allow traffic to localhost"

            Inetd conf
            19004  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 123

            #############################

            TEST WITH ALANS  FILTER.INC using the variable in the udp case

            ############################

            #######
            TEST1
            udp rule
            ########

            NAT Inbound Redirects

            rdr on vlan1 proto udp from any to 192.168.50.254 port { 161 } -> 10.250.100.129

            Reflection redirects

            rdr on $lan proto udp from any to 192.168.50.254 port { 161 } -> 127.0.0.1 port 19000

            NAT Reflection rules

            pass in quick on $lan inet proto udp from any to $loopback port 19000 keep state label "NAT REFLECT: Allow traffic to localhost"

            Inetd conf
            19000  stream  udp    nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 161

            ##########

            TEST 2
            tcp rules
            ##########

            NAT Inbound Redirects

            rdr on vlan1 proto tcp from any to 192.168.50.254 port { 80 } -> 10.250.100.129

            Reflection redirects

            rdr on $lan proto tcp from any to 192.168.50.254 port { 80 } -> 127.0.0.1 port 19002

            NAT Reflection rules

            pass in quick on $lan inet proto tcp from any to $loopback port 19001 keep state label "NAT REFLECT: Allow traffic to localhost"

            Inetd conf
            19002  stream  tcp    nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 80

            ############
            TEST3
            tcp - udp rule
            ############

            NAT Inbound Redirects

            rdr on vlan1 proto { tcp udp } from any to 192.168.50.254 port { 123 } -> 10.250.100.129

            Reflection redirects

            rdr on $lan proto { tcp udp } from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19004

            NAT Reflection rules

            pass in quick on $lan inet proto tcp from any to $loopback port 19002 keep state label "NAT REFLECT: Allow traffic to localhost"
            pass in quick on $lan inet proto udp from any to $loopback port 19002 keep state label "NAT REFLECT: Allow traffic to localhost"

            Inetd conf
            19004  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 123

            conculsion it just does not work the way you want it to.
            ports are not lining up right tcp/udp should use two nc ports and not one.
            i think you should remove the feature or really look hard at it.

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            • S
              sullrich
              last edited by

              I will just remove.  I am really tired of reflection.

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              • S
                sullrich
                last edited by

                I just commited a change to install both tcp and udp entries for reflection.  I am guessing this was the only bug that you are experiencing but its rather hard to tell from re-reading your text.

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                • A
                  aldo
                  last edited by

                  will check it out again i am getting a little tired of this one now but if you want me to work on it i will
                  let you knwo soon

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                  • A
                    aldo
                    last edited by

                    OK i made three rules 1 udp only 1 tcp only and one tcp/udp

                    19000  stream  udp    nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 161
                    19002  stream  tcp    nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 80
                    19004  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 123
                    19005  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 123

                    NAT Inbound Redirects

                    rdr on vlan1 proto udp from any to 192.168.50.254 port { 161 } -> 10.250.100.129

                    Reflection redirects

                    rdr on $lan proto udp from any to 192.168.50.254 port { 161 } -> 127.0.0.1 port 19000

                    rdr on vlan1 proto tcp from any to 192.168.50.254 port { 80 } -> 10.250.100.129

                    Reflection redirects

                    rdr on $lan proto tcp from any to 192.168.50.254 port { 80 } -> 127.0.0.1 port 19002

                    rdr on vlan1 proto { tcp udp } from any to 192.168.50.254 port { 123 } -> 10.250.100.129

                    Reflection redirects

                    rdr on $lan proto tcp from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19004
                    rdr on $lan proto udp from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19005

                    the rdr rules and the streams reconcile fine. but the localhost rules are messed up

                    NAT Reflection rules

                    pass in quick on $lan inet proto udp from any to $loopback port 19000 keep state label "NAT REFLECT: Allow traffic to localhost"
                    pass in quick on $lan inet proto tcp from any to $loopback port 19001 keep state label "NAT REFLECT: Allow traffic to localhost"
                    pass in quick on $lan inet proto tcp from any to $loopback port 19002 keep state label "NAT REFLECT: Allow traffic to localhost"
                    pass in quick on $lan inet proto udp from any to $loopback port 19002 keep state label "NAT REFLECT: Allow traffic to localhost"

                    as you can see there is nothing on 19001 and on 19002 there should only be tcp and there is nothing on 19003 or 4

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                    • S
                      sullrich
                      last edited by

                      Alrighty, thanks.  I just commited a fix for this.

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                      • A
                        aldo
                        last edited by

                        ok will test this now. thanks scott your a hard worker. ::)

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                        • A
                          aldo
                          last edited by

                          NAT Reflection rules

                          pass in quick on $lan inet proto udp from any to $loopback port 19000 keep state label "NAT REFLECT: Allow traffic to localhost"
                          pass in quick on $lan inet proto tcp from any to $loopback port 19001 keep state label "NAT REFLECT: Allow traffic to localhost"
                          pass in quick on $lan inet proto tcp from any to $loopback port 19002 keep state label "NAT REFLECT: Allow traffic to localhost"
                          pass in quick on $lan inet proto udp from any to $loopback port 19003 keep state label "NAT REFLECT: Allow traffic to localhost"

                          the below is same for rdrs and inetd streams

                          rdr on $lan proto udp from any to 192.168.50.254 port { 161 } -> 127.0.0.1 port 19000
                          rdr on $lan proto tcp from any to 192.168.50.254 port { 80 } -> 127.0.0.1 port 19002
                          rdr on $lan proto tcp from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19004
                          rdr on $lan proto udp from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19005

                          19000  stream  udp    nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 161
                          19002  stream  tcp    nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 80
                          19004  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 123
                          19005  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 123

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                          • S
                            sullrich
                            last edited by

                            Please test http://cvs.pfsense.com/cgi-bin/cvsweb.cgi/pfSense/etc/inc/filter.inc?rev=1.575.2.260;content-type=text%2Fplain;only_with_tag=RELENG_1

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                            • A
                              aldo
                              last edited by

                              less /var/etc/inetd.conf

                              18999  stream  udp    nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 161
                              19000  stream  tcp    nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 80
                              19001  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -u -w 20 10.250.100.129 123
                              19002  stream  tcp/udp nowait/0        nobody  /usr/bin/nc nc -w 20 10.250.100.129 123

                              NAT Inbound Redirects

                              rdr on $lan proto udp from any to 192.168.50.254 port { 161 } -> 127.0.0.1 port 18999
                              rdr on $lan proto tcp from any to 192.168.50.254 port { 80 } -> 127.0.0.1 port 19000
                              rdr on $lan proto tcp from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19001
                              rdr on $lan proto udp from any to 192.168.50.254 port { 123 } -> 127.0.0.1 port 19002

                              NAT Reflection rules

                              pass in quick on $lan inet proto udp from any to $loopback port 19000 keep state  label "NAT REFLECT: Allow traffic to localhost"
                              pass in quick on $lan inet proto tcp from any to $loopback port 19001 keep state label "NAT REFLECT: Allow traffic to localhost"
                              pass in quick on $lan inet proto tcp from any to $loopback port 19002 keep state  label "NAT REFLECT: Allow traffic to localhost"
                              pass in quick on $lan inet proto udp from any to $loopback port 19003 keep state  label "NAT REFLECT: Allow traffic to localhost"

                              very close now

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                              • S
                                sullrich
                                last edited by

                                Commited.  Either search filter.inc for 18999 and change to 19000 or update to the latest RELENG_1 file.

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                                • A
                                  aldo
                                  last edited by

                                  ok works but only change the first instance to 19000 leave the second one at 18999

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                                  • S
                                    sullrich
                                    last edited by

                                    Woops.  Please test my latest filter.inc:

                                    http://cvs.pfsense.com/cgi-bin/cvsweb.cgi/pfSense/etc/inc/filter.inc?rev=1.575.2.262;content-type=text%2Fplain;only_with_tag=RELENG_1

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