All my iptables are empty.
I have tried
vzctl exec 101 tcpdump -i venet0 -e host 192.168.1.254
with this result
tcpdump: WARNING: arptype 65535 not supported by libpcap - falling back to cooked socket
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on venet0:0, link-type LINUX_SLL (Linux cooked), capture size 96 bytes
19:28:19.780509 Out ethertype IPv4 (0x0800), length 100: debian.dev.local > 192.168.1.254: ICMP echo request, id 64257, seq 2237, length 64
19:28:19.780793 Out ethertype IPv4 (0x0800), length 88: debian.dev.local.36560 > 192.168.1.254.domain: 7037+ PTR? 254.1.168.192.in-addr.arpa. (44)
all other tcpdump test return nothing special.