tcpdump -i tun0 sur B pendant un ping de A vers B:

vpnmtl:~# tcpdump -i tun0
tcpdump: WARNING: arptype 65534 not supported by libpcap - falling back to cooked socket
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tun0, link-type LINUX_SLL (Linux cooked), capture size 96 bytes
19:12:24.587129 IP 10.8.0.6 > 172.23.10.1: ICMP echo request, id 39947, seq 1, length 64
19:12:24.853824 IP 172.23.10.1 > 10.8.0.6: ICMP echo reply, id 39947, seq 1, length 64
19:12:25.587720 IP 10.8.0.6 > 172.23.10.1: ICMP echo request, id 39947, seq 2, length 64
19:12:25.587758 IP 172.23.10.1 > 10.8.0.6: ICMP echo reply, id 39947, seq 2, length 64


tcpdump -i tun0 sur A pendant un ping de B vers A:
vpnqc:~# tcpdump -i tun0
tcpdump: WARNING: arptype 65534 not supported by libpcap - falling back to cooked socket
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tun0, link-type LINUX_SLL (Linux cooked), capture size 96 bytes


tcpdump -i tun0 sur B pendant un ping de B vers A:
vpnmtl:~# tcpdump -i tun0
tcpdump: WARNING: arptype 65534 not supported by libpcap - falling back to cooked socket
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tun0, link-type LINUX_SLL (Linux cooked), capture size 96 bytes
19:14:29.767601 IP 10.8.0.1 > 172.23.2.2: ICMP echo request, id 18955, seq 1, length 64
19:14:30.778556 IP 10.8.0.1 > 172.23.2.2: ICMP echo request, id 18955, seq 2, length 64
19:14:31.778581 IP 10.8.0.1 > 172.23.2.2: ICMP echo request, id 18955, seq 3, length 64
19:14:32.778595 IP 10.8.0.1 > 172.23.2.2: ICMP echo request, id 18955, seq 4, length 64
19:14:33.778625 IP 10.8.0.1 > 172.23.2.2: ICMP echo request, id 18955, seq 5, length 64