WebPagetest Forums
tcpdump's now available - Printable Version

+- WebPagetest Forums (https://www.webpagetest.org/forums)
+-- Forum: WebPagetest (/forumdisplay.php?fid=7)
+--- Forum: Announcements (/forumdisplay.php?fid=8)
+--- Thread: tcpdump's now available (/showthread.php?tid=481)

tcpdump's now available - pmeenan - 01-07-2011 06:11 AM

If you want to get a tcpdump along with your test data (for analysis in Wireshark or a similar tool) there is now a checkbox in the advanced settings that lets you request one.

I try not to look at them when I can avoid it but sometimes you really do need to see the raw packet flow, particularly if you're trying to prove to a 3rd party that they are having issues (or if you're a 3rd party trying to disprove it).

RE: tcpdump's now available - pmeenan - 01-07-2011 09:46 PM

I should probably mention that the tcpdump will show up as a link on the results page right below the load time for each test (to the left of the waterfall thumbnails).

RE: tcpdump's now available - SundeepPundamale - 05-15-2014 12:19 AM

I found the link to access tcpdump but that wouldn't work. It re-directs me to cloudshark with an error message:

Details: connect() timed out!
Please go back and try again, or contact CloudShark Support for assistance.

The tcpdump file has an extension .cap which i cannot open with few popular text editors. Tried to download the file and access it.

RE: tcpdump's now available - pmeenan - 05-15-2014 12:31 AM

You can't read packet captures directly - they are a binary format. You need something like wireshark though if you're not already familiar with reading packet captures you're in for quite a learning curve (I highly recommend learning it though).

Not sure what happened with the cloudshark request - possibly a short-term outage. They basically provide a hosted version of wireshark.

RE: tcpdump's now available - SundeepPundamale - 05-15-2014 01:19 AM

Thanks for the pointers !! I am analysing the captures in Wireshark..