Greetings List, This is a really strange problem, that I can't tell if it's squid or bind causing it. Here's the summary: For only ONE address, whenever I attempt to access it through the proxy, the record disappears from DNS, and the retry time changes too. Essentially, accessing www.thisdomain.com works, but a link to a portal on that page to the subdomain login.thisdomain.com causes the problem. Here's a the output of dig from before accessing the page: ; <<>> DiG 9.4.1-P1 <<>> login.thisdomain.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45037 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0 ;; QUESTION SECTION: ;login.thisdomain.com. IN A ;; ANSWER SECTION: login.thisdomain.com. 17 IN A 111.222.333.123 ;; AUTHORITY SECTION: thisdomain.com. 168319 IN NS ns1.thisdomain.com. thisdomain.com. 168319 IN NS ns2.thisdomain.com. ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Aug 22 12:29:57 2013 ;; MSG SIZE rcvd: 88 You can do anything to request the address from bind and it works, *except* try to access it through squid. Bypassing squid and going directly through the firewall works fine. Now, immediately after you try to access it through squid: ; <<>> DiG 9.4.1-P1 <<>> login.thisdomain.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 43943 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;login.thisdomain.com. IN A ;; AUTHORITY SECTION: thisdomain.com. 298 IN SOA ns1.thisdomain.com. serv.anotherdomain.com. 2006062510 3600 3600 2592000 300 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Aug 22 12:30:06 2013 ;; MSG SIZE rcvd: 95 After the 5-minute retry shown above expires, the original record reappears. Ideas? Should I be looking at squid, or bind for the issue? Has anyone seen anything similar before? All other proxy and dns operations work perfectly, and it's a pretty heavily utilized proxy. I'm stumped. -John -- Please consider the environment before printing this e-mail. This e-mail is intended only for the named person or entity to which it is addressed and contains valuable business information that is privileged, confidential and/or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or the information herein by anyone other than the intended recipient, or an employee, or agent responsible for delivering the message to the intended recipient, is strictly prohibited. All contents are the copyright property of the sender. If you are not the intended recipient, you are nevertheless bound to respect the sender's worldwide legal rights. We require that unintended recipients delete the e-mail and destroy all electronic copies in their system, retaining no copies in any media. If you have received this e-mail in error, please immediately notify us by calling our Help Desk at (603) 433-1143, or e-mail to it@xxxxxxxxxxxxxxxxx. We appreciate your cooperation.
