3 Replies Latest reply on Mar 30, 2015 6:36 AM by jgerak

    PPP T1 and WAN on 3448 NAT? IP Spoof? Help!

    jgerak New Member

      Ok i have two sites.

      Adtran Network Map.png

                            REMOTE 3448                                                     HQ  3205                                     

       

      I'm having issues connecting for example RDP to computers on the other side of the PPP T1.

      Basically just want to bridge the sites together. Both sides have separate WAN connections.

      I can ping the 10.10.11.253 Router from the 10.10.10.X

      I can not ping the 10.10.10.253 Router from 10.10.11.X

       

      Firewall is off on HQ Netvanta 3205, Sonicwall is firewall.

      Firewall is on in the Remote Netvanta 3448.



      Sonicwall has route for 10.10.11.0 to use 10.10.10.253 which works.

      Getting IP spoofs in my sonicwall at HQ from WAN IP from REMOTE site. <------- Think this is my issue.?.?.?   NAT Issues?


      Configs attached


      Thanks,

      J


        • Re: PPP T1 and WAN on 3448 NAT? IP Spoof? Help!
          jgerak New Member

          Forgot to mention I can ping over the PPP T1 both ways when i telnet into the routers

           

          10.10.10.253 can ping 10.10.11.253

           

          10.10.11.253 can ping 10.10.10.253

            • Re: PPP T1 and WAN on 3448 NAT? IP Spoof? Help!
              rmcknight New Member

              I'll take a stab - 2 things...

              Try removing the ip access-policy Private on the 3448's PPP interface

               

              you might take a look at the subnet masks on each ppp interface - see Configuring PPP in AOS Quick Configuration Guide

               

              We do these using a /30 255.255.255.252 subnet mask - remove the peer default ip address statements, and change the ppp interfaces accordingly below...

              Not sure if this is the issue

               

               

               

              for the 3205 -

              nterface ppp 1

                description ppp T1 to Remote

                ip address  192.168.200.201  255.255.255.252

                ip mtu 1500

                media-gateway ip primary

                no shutdown

                cross-connect 1 t1 1/1 1 ppp 1

               

              for the 3448

              interface ppp 1

                description ppp T1 to HQ

                ip address  192.168.200.202  255.255.255.252

                ip mtu 1500

                media-gateway ip primary

              no shutdown

                cross-connect 1 t1 1/1 1 ppp 1

            • Re: PPP T1 and WAN on 3448 NAT? IP Spoof? Help!
              jgerak New Member

              I did notice the subnets on the PPP connection and fixed them.

              I ended up calling ADTRAN tech support and I must say i'm very pleased with their support. I put a ticket in and about an hour later they called me and helped me figure out the issue.

               

              The issue was i had to put a allow rule in the 10.10.11.X router to the 10.10.10.0/24.

               

              RESOLVED.