こうやって
% sudo tcpdump -D 1.en0 2.fw0 3.bridge0 4.en1 5.en2 6.lo0 [Loopback]
こうやるのか?
% sudo tcpdump -i lo0 port 8080 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on lo0, link-type NULL (BSD loopback), capture size 262144 bytes