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    Nat reflection and udp

    Scheduled Pinned Locked Moved NAT
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    • A
      aldo
      last edited by

      this definatly works correctly here

      switch($rule['protocol']) {
                                                                              case "tcp/udp":
                                                                                      $protocol = "{ tcp udp }";
                                                                                      $ipfrules .= "pass in quick on ${$ifname_real} inet proto tcp from any to $loopback port {$starting_localhost_port} keep state label "NAT REFLECT: Allow traffic to localhost"\n";
                                                                                      $ipfrules .= "pass in quick on ${$ifname_real} inet proto udp from any to $loopback port {$starting_localhost_port} keep state label "NAT REFLECT: Allow traffic to localhost"\n";
                                                                                      break;
                                                                              case "tcp":
                                                                                      $protocol = $rule['protocol'];
                                                                                      $ipfrules .= "pass in quick on ${$ifname_real} inet proto tcp from any to $loopback port {$starting_localhost_port} keep state label "NAT REFLECT: Allow traffic to localhost"\n";
                                                                                      break;
                                                                              case "udp":
                                                                                      $protocol = $rule['protocol'];
                                                                                      $ipfrules .= "pass in quick on ${$ifname_real} inet proto udp from any to $loopback port {$starting_localhost_port} keep state label "NAT REFLECT: Allow traffic to localhost"\n";
                                                                                      break;
                                                                              default:
                                                                                      break;
                                                                      }

      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"

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      • S
        sullrich
        last edited by

        Your not making any sense.  Are you saying what is commited does not work?  There is no difference, the udp case gets hit for tcp OR udp since there is no break.

        Watch this example program:

        $protocol = "tcp";

        switch($protocol) {
                case "tcp":
                case "udp":
                        echo "case met";

        }

        ?>

        php -f test.php

        case met#

        As you can see since there is no break, the case "udp" gets processed for either.

        Now consider this:

        $protocol = "udp";

        switch($protocol) {
                case "tcp":
                case "udp":
                        echo "case met";

        }

        ?>

        php -f test.php

        case met#

        As you can see you do not need to do it your way.

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

          i agree but that was the result

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          • S
            sullrich
            last edited by

            Rerun the commands that I mentioned earlier.  I have updated the file to cover the tcp case either way.

            I know for a fact that if other devs catch wind of this they are not going to like it.  I would have to agree with them, this should not be necessary.

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            • A
              aldo
              last edited by

              i see the issue scott

              make the udp case empty above the tcp case
              and fill in the tcp case but then look at your working cases in the rdr sections there is the issue
              i reran the commands but there is an error in the filter.inc on 389 or thereabouts now as well i fixed an if that was missing an I

              role it back scott i will work on it tomorrow i understand what youa re trying to achieve now and how you should do it using your method.
              i will have better resourses tomorrow i am at home at moment and is 1am

              i will send you the diffs tomorrow for your review

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

                ok i think you will be happy with the localhost rules but not so pleased with the nc inetd bits
                have a look and let me know

                it works perfectly and that was my goal

                filter.inc.txt

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                • S
                  sullrich
                  last edited by

                  Looks like you started with a dated filter.inc.

                  Can you:

                  #1 update your filter.inc and make the changes again
                  #2 send a diff -u patch?  I need to also make these changes in -HEAD which this will assist with

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

                    will do it tomorrow for you got it working on a 7-9-06 box.

                    so will diff for you when i can

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                    • S
                      sullrich
                      last edited by

                      You need to include the most latest and greatest filter.inc.

                      http://pfsense.com/cgi-bin/cvsweb.cgi/pfSense/etc/inc/filter.inc?only_with_tag=RELENG_1

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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.

                          1 Reply Last reply Reply Quote 0
                          • 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.

                                1 Reply Last reply Reply Quote 0
                                • 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. ::)

                                          1 Reply Last reply Reply Quote 0
                                          • 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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