I can't count the number of times tcpdump has made debugging a problem a zillion times faster. It's my go to tool for any network related issue. I tend to end

I can't count the number of times tcpdump has made debugging a problem a zillion times faster. It's my go to tool for any network related issue. I tend to end up using wireshark for analysis of more complicated SIP issues but I always start with tcpdump.