Hi Amos You can see the tcp_miss in the access.log here:- 1269834108.182 120002 127.0.0.1 TCP_MISS/000 0 GET http://www.environment.gov.au - DIRECT/155.187.3.81 - Here is a tcpdump output from the connection. You can see the TCP handshake setup and then the http session just hangs? I have confirmed with the website admin these are no ddos type protection, which would block multiple requests in quick succession. The tcp connection times out and then resets. [root@squid-proxy ~]# tcpdump net 155.187.3 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes 16:58:59.369482 IP xxx.xxxx.xxx.xxx.41338 > 155.187.3.81.http: S 1781942738:1781942738(0) win 5840 <mss 1460,sackOK,timestamp 1321171542 0,nop,wscale 7> 16:58:59.418150 IP 155.187.3.81.http > xxx.xxxx.xxx.xxx.41338: S 2343505326:2343505326(0) ack 1781942739 win 32768 <mss 1460,nop,wscale 0,nop,nop,timestamp 234270252 1321171542,sackOK,eol> 16:58:59.418167 IP xxx.xxxx.xxx.xxx.41338 > 155.187.3.81.http: . ack 1 win 46 <nop,nop,timestamp 1321171591 234270252> 16:58:59.418213 IP xxx.xxxx.xxx.xxx.41338 > 155.187.3.81.http: P 1:696(695) ack 1 win 46 <nop,nop,timestamp 1321171591 234270252> 16:58:59.477692 IP 155.187.3.81.http > xxx.xxxx.xxx.xxx.41338: P 2897:4081(1184) ack 696 win 33304 <nop,nop,timestamp 234270307 1321171591> 16:58:59.477700 IP xxx.xxxx.xxx.xxx.41338 > 155.187.3.81.http: . ack 1 win 46 <nop,nop,timestamp 1321171650 234270252,nop,nop,sack 1 {2897:4081}> cheers Ivan On Mon, Mar 29, 2010 at 3:59 PM, Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote: > Ivan . wrote: >> >> Hi, >> >> What would cause a TCP MISS 502, which would prevent a site from >> loading? The site works on squidv3.0 but not on v2.6? >> > > Any one of quite a few things. The ERR_READ_ERROR result means the remote > server or network is closing the TCP link on you for some unknown reason. > > Why it works in 3.0 is as much a mystery as why it does not in 2.6 until > details of the traffic on Squid->Server TCP link are known. > > > Amos > -- > Please be using > Current Stable Squid 2.7.STABLE8 or 3.0.STABLE25 > Current Beta Squid 3.1.0.18 >
