I believe that a basic tcpdump test for port 80 will show you if there is any access to the cache_peer IP address. If it's a production and loaded system it will be a bit of a problem to do that. It will minimize the problem from the network level which is might be the reason to the application level. Eliezer On 07/24/2013 07:37 AM, PSA4444 wrote: > I am running a squid reverse proxy in a DMZ which allows the outside world to > access several websites I am hosting. One of these websites is a nagios > server. > > Everything has been working well for months but this morning, users were not > able to access the nagios site. > > Nobody has changed anything on either server for months. This is being > logged in access.log: > > xx.xx.xx.xx TCP_MISS/403 680 GET http://nagios.blah.com/nagios - > FIRSTUP_PARENT/yy.yy.yy.yy text/html > xx.xx.xx.xx TCP_MISS/403 680 GET http://nagios.blah.com/favicon.ico - > FIRSTUP_PARENT/yy.yy.yy.yy text/html > > xx.xx.xx.xx = source IP > yy.yy.yy.yy = unknown ip > > Relevant entry: > > #Nagios > cache_peer nagios.blah.com parent 80 0 no-query originserver name=nag > login=PASSTHRU > acl sites_nag dstdomain nagios.blah.com > cache_peer_access nag allow sites_nag firstclient > cache_peer_access nag allow sites_nag secondclient > cache_peer_access nag deny publicall > acl https proto https > http_access allow all > > I have a hosts file entry pointing the squid server to the local nagios > server. > > 10.0.1.23 nagios.blah.com > > Connecting directly to this via squid using the links browser works. > Connecting directly to the nagios server via firefox within the network also > works. > I have tried restarting squid and the apache service on the nagios server. > > Any idea what's wrong, why this suddenly started happening and how to fix > it? > > > > -- > View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Squid-3-2-1-Reverse-Proxy-TCP-MISS-403-suddenly-appearing-for-one-cache-peer-tp4661218.html > Sent from the Squid - Users mailing list archive at Nabble.com. >
