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    Nat reflection and udp

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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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