Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Nat reflection and udp

    Scheduled Pinned Locked Moved NAT
    58 Posts 3 Posters 24.9k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • 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

      1 Reply Last reply Reply Quote 0
      • 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.

        1 Reply Last reply Reply Quote 0
        • 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.

            1 Reply Last reply Reply Quote 0
            • 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

              1 Reply Last reply Reply Quote 0
              • 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

                1 Reply Last reply Reply Quote 0
                • S
                  sullrich
                  last edited by

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

                  1 Reply Last reply Reply Quote 0
                  • 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

                      1 Reply Last reply Reply Quote 0
                      • 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

                        1 Reply Last reply Reply Quote 0
                        • 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

                          1 Reply Last reply Reply Quote 0
                          • S
                            sullrich
                            last edited by

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

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

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

                              1 Reply Last reply Reply Quote 0
                              • 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

                                1 Reply Last reply Reply Quote 0
                                • First post
                                  Last post
                                Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.