2012/9/28 woitek <wojtek@xxxxxxxxxxxxxx>: > Hello, > > I seem to have quite the same problem, except that it is happening with > Squid-2.7 and -3.2 (I tested the newest version yesterday) on the OpenBSD > operating system. > > A couple days ago (over a week ago) users started complaining about > *sometimes* not being able to access portions of Facebook. It was very hard > to spot, but later I found out where there is a problem almost nonstop - > when you access pictures on a profile, like on one of ours: > http://www.facebook.com/zycienagoraco?ref=ts > > I mean clicking on "zdjęcia", next to the square that has the number of > people liking it. You don't even have to be logged in for that, everything > is via http:// (not https://). > > The problem doesn't show up every time but rather after a few visits to the > link. Then, once you click, the request goes to the original site (I can > confirm it with tcpdump), but no reply comes back. After a few minutes Squid > probably timeouts, and doees something again, which it doesn't do in the > meantime, because of which the page loads (it loads a few times, actually - > you have to go "back" a few times to reach the main page, - probably because > it's javascripted). > > So far I've seen that the problem occurs both in transparent and in proxy > mode. It might have something to do with the way FB load balances over it's > servers - by changing the IP in the DNS often (2 minutes?). But still I > can't imaging how with such frequent changes hitting the wrong node of the > LB (there seem to be only 2, or 3 different IPs for facebook.com where I am > connecting from) could create a timeout like this one. > > The problem, however, does NOT occur on a different server, which is Linux, > not OpenBSD, a slightly different Squid (3.1.x), a different ISP uplink, > naturally different firewall... I'll be diagnosing it more, but maybe you'll > be able to help with what you discover. Thanks. > > > > > -- > View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Can-t-access-facebook-com-through-squid-3-1-19-tp4656604p4656821.html > Sent from the Squid - Users mailing list archive at Nabble.com. //I didn't have time to read the whole thread so forgive me if this has already been mentioned As far as I understood from a recent newsarticle facebook is one of the big players that support SPDY these days, maybe that has something to do with this problem? Regards, Eliyahu - אליהו
