On 9/01/2013 5:27 p.m., Simon Matthews wrote:
I am finding that some websites do not respond when queried through squid.
I looked at this page, which suggests some solutions:
http://squidproxy.wordpress.com/2007/06/05/thinsg-to-look-at-if-websites-are-hanging
but I don't think it gives any useful suggestions. I tried setting the
mss to 1200 without success.
The basic reason that I don't think these suggestions are appropriate
for the problems I am seeing is simply that queries from the same
machine using telnet or wget (but not from squid) do get responses, so
the problem appears to be related to squid, rather than the networking
setup.
So where are the packets disappearing?
The article is a bit old but those are still the main reasons. Nowdays
things are also compounded by IPv6 and ICMPv6 packets also having
ECN/PMTU/WSS issues, you need to check whether Squid is performing IPv4
or IPv6 then followup carefully in each of those protocols. Note that
wget and telnet can easily use a different version of IP with better
results.
If you can mention some specific sites (or better specific URLs) which
are failing maybe someone can take a look and see if its just your or a
bigger issue.
Amos
