Hello,
Recently while installing a firewall for someone, I noticed that the
firewall seemed to cause/exacerbate Internet performance issues. There
were some issues even without the firewall, but the firewall definitely
made the issues significantly worse.
Of course I used Wireshark to perform a whole bunch of captures but I
could not figure out anything definitive.
I did notice that when I had a "problem" connection which would exhibit
erratic throughput (for example, an http download), that there seemed to
be a fairly high number of duplicate acks/retransmissions/out of order
packets - around 10%.
My question is - for trying to monitor/isolate/troubleshoot network
performance problems, are there any addition ways I can leverage
Wireshark or use complimentary tools?
What about simulation? Would anyone recommend something like this to
help? If so, could you recommend a tool to use in concert with
Wireshark?
Thanks,
--Jim
