Derek Chesterfield
12/30/2005 11:22:00 AM
On 21 Dec 2005, at 5:32am, sven.schott@gmail.com wrote:
> You can try it just with tcpdump -n. When you try to connect to
> the local ip address using port 7000, it doesn't show up in the dump.
To dump packets to/from the loopback, you need to tell tcpdump to
look at the correct interface [otherwise it defaults to the Ethernet
- en0 on Mac OS X]:
> $ sudo tcpdump -n -i lo0
> tcpdump: verbose output suppressed, use -v or -vv for full protocol
> decode
> listening on lo0, link-type NULL (BSD loopback), capture size 96 bytes
> 11:20:19.581714 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq 9
> 11:20:19.581763 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo reply seq 9
> 11:20:20.582133 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq 10
> 11:20:20.582178 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo reply seq 10