ab -n 10 Then come back and control-C out of the tcpdump capture. Other popular URL-hitters you might install are curl, wget, and siege. I go to another window and hit the URL I’m having trouble with – you can use whatever, but I used ab (Apachebench) which comes with OSX. I’m using en0 the primary wireless interface, so I run: sudo tcpdump -i en0 -s 0 -B 524288 -w ~/Desktop/DumpFile01.pcap Then, run a packet trace on that interface. This will list all your network interfaces. Step one is figure out what network interface you want to dump.

Tcpdump comes on OSX (or if it doesn’t, something installed it without me knowing!). So I’m having trouble with connection times spiking to an Amazon Web Services ELB, so it’s time to break out the tcpdump to take packet traces and the wireshark (was ethereal long ago) to analyze it. I’m going to start sharing little techie tidbits that require me to go scour the Internet for exactly how to do them, in hopes of making you able to do it in a lot less time than it took me!

Wireshark macbook