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I have been trying to get the VPN to work for a few days now, and I have the VPN being created for the tun0 interface. I'm not 100% sure if this is a VPN config error, or another problem. I haven't been able to connect to anything although I am getting data sent out and received back. I'm running on ubuntu and just trying to bind rtorrent to the VPN once I figure it out. I've been trying to use ping to see what I can and can't connect to. Pinging 10.4.0.1 works great. ###:###$ ping -I tun0 10.4.0.1 PING 10.4.0.1 (10.4.0.1) from 10.4.61.179 tun0: 56(84) bytes of data. 64 bytes from 10.4.0.1: icmp_seq=1 ttl=64 time=81.1 ms 64 bytes from 10.4.0.1: icmp_seq=2 ttl=64 time=82.3 ms 64 bytes from 10.4.0.1: icmp_seq=3 ttl=64 time=82.2 ms However, pinging 8.8.8.8 is not. ###:###$ ping -I tun0 8.8.8.8 PING 8.8.8.8 (8.8.8.8) from 10.4.61.179 tun0: 56(84) bytes of data. ^C --- 8.8.8.8 ping statistics --- 12 packets transmitted, 0 received, 100% packet loss, time 11088ms And this is the tcpdump data showing that I am actually receiving the ICMP reply. ###:#### tcpdump -i tun0 -n tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on tun0, link-type RAW (Raw IP), capture size 262144 bytes 00:25:43.902145 IP 10.4.61.179 > 8.8.8.8: ICMP echo request, id 1939, seq 5, length 64 00:25:43.984580 IP 8.8.8.8 > 10.4.61.179: ICMP echo reply, id 1939, seq 5, length 64 00:25:44.910111 IP 10.4.61.179 > 8.8.8.8: ICMP echo request, id 1939, seq 6, length 64 00:25:44.991955 IP 8.8.8.8 > 10.4.61.179: ICMP echo reply, id 1939, seq 6, length 64 00:25:45.918162 IP 10.4.61.179 > 8.8.8.8: ICMP echo request, id 1939, seq 7, length 64 00:25:46.002446 IP 8.8.8.8 > 10.4.61.179: ICMP echo reply, id 1939, seq 7, length 64 00:25:46.926141 IP 10.4.61.179 > 8.8.8.8: ICMP echo request, id 1939, seq 8, length 64 00:25:47.008672 IP 8.8.8.8 > 10.4.61.179: ICMP echo reply, id 1939, seq 8, length 64 00:25:47.934134 IP 10.4.61.179 > 8.8.8.8: ICMP echo request, id 1939, seq 9, length 64 00:25:48.015698 IP 8.8.8.8 > 10.4.61.179: ICMP echo reply, id 1939, seq 9, length 64 ^C 10 packets captured 10 packets received by filter 0 packets dropped by kernel The first thing I thought of when I saw that is that iptables might be doing something weird, so I checked that. I know this isn't the best thing do have on a computer but I'm just trying to get the config working on this first and then I'll move it to a machine with firewall rules on it. ###:###$ sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Please let me know if I can provide any other information that can be helpful.