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tcpdump on loopback device

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tcpdump on loopback device

Postby gfim » Thu Mar 22, 2007 1:25 am

I've successfully installed tcpdump from the 3rd party software
repository and it works fine for monitoring the en0 interface. However,
when I try to monitor the loopback device, it gives an error and exits.
This is on QNX 6.3.0 using tcpdump 3.7.1 with libpcap 0.7.

# tcpdump
tcpdump: listening on en0
0 packets...
# tcpdump -i en0
tcpdump: listening on en0
0 packets...
# tcpdump -i lo0
tcpdump: BIOCSETIF: lo0: No such device or address
# /sbin/ifconfig
lo0: flags=...
en0: flags=...

Does anybody have any ideas?

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