On 6/01/2016 7:29 p.m., Jason Haar wrote: > On 06/01/16 17:39, Amos Jeffries wrote: >> On 6/01/2016 5:04 p.m., Jason Haar wrote: >>> Hi there >>> >>> Weird - several times in the past couple of months I have found I cannot >>> get to http://wiki.squid-cache.org/ - I get the error below from my >>> squid-3.5.11 server which does not have a Global ipv6 address (it has a >>> Local ipv6/fe80: on the Ethernet card - but nothing else). Google.com >>> (which is fully ipv6 capable) works fine - so far only >>> wiki.squid-cache.org has shown up this way to me (ie I don't see this >>> error message. >>> >>> On the squid server, "dig a" shows valid ipv4 addresses and "dig aaaa" >>> shows the ipv6 address - but why is squid even trying to connect over >>> ipv6 If doesn't have an ipv6 address? >>> >>> Could this be a case of the "A" record failing to return fast enough, >>> forcing squid to only try ipv6 - which then leads to the error message >>> referring to the ipv6 address? >> Squid waits for both A and AAAA before continuing after DNS lookup. The >> only way to get only IPv6 results is for your DNS server to produce no A >> results at all. Timeout _could_ do that, but the default is 30 sec so >> unlikely. > > I think that must be the case, because when I saw the problem this > morning, I immediately ssh'ed into the squid server and nslookup showed > it was resolving the name to it's A record just fine (by then) - and > telnet-ing to the IPv4 address was fine too. So it must have either > timed out on the A lookups (but not the AAAA records), or the DNS server > didn't return A records at all? I don't think there's a way to query > squid to see what it's current DNS cache is? That would definitively > answer that question
The cache manager "ipcache" report contains a listing of the DNS cache: squidclient mgr:ipcache > > >> The Squid wiki is dual-stacked with IPv4 addresses. Sice you have >> v4-only network the thing to do is find out why the IPv4 are not >> working for your Squid. > > Well yeah - but I frankly don't see this on any other website (like > google.com) - just wiki.squid-cache.org - so I think there's something > going on between those DNS servers and my squid server sitting on a > SPARK NZ network Hmm. Wiki is in Italy IIRC so almost worst case RTT for us. Though I've not seen such issues from my Orcon POP. Amos _______________________________________________ squid-users mailing list squid-users@lists.squid-cache.org http://lists.squid-cache.org/listinfo/squid-users
