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    Nat reflection and udp

    Scheduled Pinned Locked Moved NAT
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    • S
      sullrich
      last edited by

      There is no break, it automatically hits the next case.

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      • A
        aldo
        last edited by

        ok sorry i just stripped you code when pasting not mine

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        • A
          aldo
          last edited by

          one last thing you have an extra white space on the udp stream now.
          i did them both in clean cases before and all worked well

          for the inetd i added info the the tcp case and the upd case as i did in the localhost allow rule your
          solution was definatly neater but there is a whitespace issue

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          • S
            sullrich
            last edited by

            Please test the file that I posted.  It really should be working now.

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            • S
              sullrich
              last edited by

              @aldo:

              one last thing you have an extra white space on the udp stream now.
              i did them both in clean cases before and all worked well

              for the inetd i added info the the tcp case and the upd case as i did in the localhost allow rule your
              solution was definatly neater but there is a whitespace issue

              Not sure what you mean.  Please show me either the generated rules from rules.debug or the netcat entries from inetd.conf

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              • A
                aldo
                last edited by

                19000 stream udp nowait/0 nobody /usr/bin/nc nc  -u -w 20 192.168.200.200 161
                19002 stream tcp nowait/0 nobody /usr/bin/nc nc -w 20 192.168.200.200 8000

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                • S
                  sullrich
                  last edited by

                  Yeah it doesn't look "good" but it should work..

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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 udp from any to $loopback port 19001 keep state
                    label "NAT REFLECT: Allow traffic to localhost"

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                    • A
                      aldo
                      last edited by

                      /* $Id: filter.inc,v 1.575.2.248 2006/09/09 22:53:48 sullrich Exp $ */

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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.

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                          • 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

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                                • 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

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                                    • 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.

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