Hi everybody, I have problem with iptables and maybe somebody can help me to find a solution. I need to connect to another network through a ppp connection. What I did has been: to set the ppp connection and set iptables to forward the packets with the remote network as destination to the ppp. Then I set the route of my pc using the linux machine as the gateway. Everything works well, http, ssh, xwindows, is all OK. I can also enter into a Cisco VPN in the remote network. There is only one application that does not work. I don't know how this application is done. I simply did a tcpdump while I was using this application. Note: the ping from my pc to the destination server works. Only this application doesn't. Unfortunately it is a windows application. Looks that this application receives and sends udp packets but they are not forwarded correctly. Here is the tcpdump / windump result. (sunrpc is port 111) ------------------------------ on the gateway machine: tcpdump -i ppp0 15:02:30.528227 10.5.17.21.1491 > 10.21.109.84.sunrpc: udp 56 15:02:30.675801 10.21.109.46.sunrpc > 10.5.17.21.1491: udp 28 (DF) 15:02:30.675840 10.5.17.21 > 10.21.109.46: icmp: 10.5.17.21 udp port 1491 unreachable [tos 0xc0] 15:02:45.530046 10.5.17.21.1491 > 10.21.109.84.sunrpc: udp 56 15:02:45.728534 10.21.109.46.sunrpc > 10.5.17.21.1491: udp 28 (DF) 15:02:45.728564 10.5.17.21 > 10.21.109.46: icmp: 10.5.17.21 udp port 1491 unreachable [tos 0xc0] 15:03:15.548364 10.5.17.21.1491 > 10.21.109.84.sunrpc: udp 56 15:03:15.683612 10.21.109.46.sunrpc > 10.5.17.21.1491: udp 28 (DF) 15:03:15.683641 10.5.17.21 > 10.21.109.46: icmp: 10.5.17.21 udp port 1491 unreachable [tos 0xc0] ----------------------- On my pc: windump -p udp 15:03:10.320679 IP platone.replynet.prv.1491 > ttsat.111: udp 56 15:03:25.319739 IP platone.replynet.prv.1491 > ttsat.111: udp 56 15:03:55.332502 IP platone.replynet.prv.1491 > ttsat.111: udp 56 Can someone help me? Thanks Massimo
