we have a squid proxy set up as transparent. a few days ago users started complaining because sometimes they would get a message like: ------------------------------------------ The requested URL could not be retrieved While trying to retrieve the URL: http://mail.yahoo.com/ The following error was encountered: Unable to determine IP address from host name for mail.yahoo.com The dnsserver returned: No Address records This means that: The cache was not able to resolve the hostname presented in the URL. Check if the address is correct. ------------------------------------------ poking in the DNS, i find: Name: login.yahoo.akadns.net Addresses: 64.58.76.98, 64.58.76.99 Aliases: mail.yahoo.com, login.yahoo.com so, mail.yahoo.com isn't an A record, but a CNAME pointing to something at akadns. we are thinking there might be some issue with some dynamic nature of yahoo's dns. are we barking up the right tree? -- [ Jim Mercer jim@pneumonoultramicroscopicsilicovolcanoconiosis.ca ] [ Reptilian Research -- Longer Life through Colder Blood ] [ aka jim@reptiles.org +1 416 410-5633 ]
On Fri, Mar 09, 2001 at 10:12:56AM -0500, Jim Mercer wrote:
poking in the DNS, i find:
Name: login.yahoo.akadns.net Addresses: 64.58.76.98, 64.58.76.99 Aliases: mail.yahoo.com, login.yahoo.com
so, mail.yahoo.com isn't an A record, but a CNAME pointing to something at akadns.
we are thinking there might be some issue with some dynamic nature of yahoo's dns.
We'll take a look at it for you. -- Dan Ritter Akamai Network Consulting 617 250 3035
On Fri, Mar 09, 2001 at 10:12:56AM -0500, Jim Mercer wrote:
poking in the DNS, i find:
Name: login.yahoo.akadns.net Addresses: 64.58.76.98, 64.58.76.99 Aliases: mail.yahoo.com, login.yahoo.com
so, mail.yahoo.com isn't an A record, but a CNAME pointing to something at akadns.
we are thinking there might be some issue with some dynamic nature of yahoo's dns.
are we barking up the right tree?
Possibly. According to the RFCs that's a perfectly valid configuration, but according to some pedantic anal retentives (hi, Greg!) it's not. If one of those PARs wrote Squid, that could be your issue. Fortunately, you have the source; check for yourself, and fix it if it's true.
[ On Friday, March 9, 2001 at 14:36:26 (-0500), Shawn McMahon wrote: ]
Subject: Re: mail.yahoo.com, "missing A records" and squid proxy
Possibly. According to the RFCs that's a perfectly valid configuration, but according to some pedantic anal retentives (hi, Greg!) it's not.
Well, you don't have to be much of a PAR to find a problem with this: $ host -r -Z -t ns yahoo.akadns.net za.akadns.net yahoo.akadns.net. 90000 IN NS ze.akadns.net. yahoo.akadns.net. 90000 IN NS zk.akadns.net. !!! yahoo.akadns.net NS host zk.akadns.net does not exist yahoo.akadns.net. 90000 IN NS zh.akadns.net. yahoo.akadns.net. 90000 IN NS zj.akadns.net. !!! yahoo.akadns.net NS host zj.akadns.net does not exist yahoo.akadns.net. 90000 IN NS zb.akadns.net. yahoo.akadns.net. 90000 IN NS zi.akadns.net. !!! yahoo.akadns.net NS host zi.akadns.net does not exist yahoo.akadns.net. 90000 IN NS zg.akadns.net. yahoo.akadns.net. 90000 IN NS zf.akadns.net. yahoo.akadns.net. 90000 IN NS zc.akadns.net. yahoo.akadns.net. 90000 IN NS zd.akadns.net. yahoo.akadns.net. 90000 IN NS zl.akadns.net. !!! yahoo.akadns.net NS host zl.akadns.net does not exist yahoo.akadns.net. 90000 IN NS za.akadns.net. -- Greg A. Woods +1 416 218-0098 VE3TCP <gwoods@acm.org> <robohack!woods> Planix, Inc. <woods@planix.com>; Secrets of the Weird <woods@weird.com>
On Fri, Mar 09, 2001 at 04:39:50PM -0500, Greg A. Woods wrote:
[ On Friday, March 9, 2001 at 14:36:26 (-0500), Shawn McMahon wrote: ]
Subject: Re: mail.yahoo.com, "missing A records" and squid proxy
Possibly. According to the RFCs that's a perfectly valid configuration, but according to some pedantic anal retentives (hi, Greg!) it's not.
Well, you don't have to be much of a PAR to find a problem with this:
$ host -r -Z -t ns yahoo.akadns.net za.akadns.net yahoo.akadns.net. 90000 IN NS ze.akadns.net. yahoo.akadns.net. 90000 IN NS zk.akadns.net. !!! yahoo.akadns.net NS host zk.akadns.net does not exist yahoo.akadns.net. 90000 IN NS zh.akadns.net. yahoo.akadns.net. 90000 IN NS zj.akadns.net. !!! yahoo.akadns.net NS host zj.akadns.net does not exist yahoo.akadns.net. 90000 IN NS zb.akadns.net. yahoo.akadns.net. 90000 IN NS zi.akadns.net. !!! yahoo.akadns.net NS host zi.akadns.net does not exist yahoo.akadns.net. 90000 IN NS zg.akadns.net. yahoo.akadns.net. 90000 IN NS zf.akadns.net. yahoo.akadns.net. 90000 IN NS zc.akadns.net. yahoo.akadns.net. 90000 IN NS zd.akadns.net. yahoo.akadns.net. 90000 IN NS zl.akadns.net. !!! yahoo.akadns.net NS host zl.akadns.net does not exist yahoo.akadns.net. 90000 IN NS za.akadns.net.
This has now been fixed. -- John Payne http://www.sackheads.org/jpayne/ john@sackheads.org http://www.sackheads.org/uce/ Fax: +44 870 0547954 To send me mail, use the address in the From: header
participants (5)
-
dsr＠tao.ne.mediaone.net -
Jim Mercer -
John Payne -
Shawn McMahon -
woods＠weird.com