Re: [squid-users] Webmail/round robin dns problem

>
> We're having a problem with an external webmail site that uses round robin
> dns:
>
>> webmail.domain.com
> Server: 10.51.#.#
> Address: 10.51.#.##53
>
> Non-authoritative answer:
> Name: webmail.domain.com
> Address: 12.145.#.5
> Name: webmail.domain.com
> Address: 166.73.#.139
> Name: webmail.domain.com
> Address: 12.145.#.56
>
> Bringing up the original webmail site works fine, but a user's session
> gets
> bounced between
> The different webmail servers during authentication.
>
> Thu Sep 4 13:50:53 2008 280 10.52.15.128 TCP_MISS/302 228 GET
> http://webmail.domain.com/ username DIRECT/12.145.#.56-
> Thu Sep 4 13:51:39 2008 45424 10.52.15.128 TCP_MISS/200 281989 CONNECT
> webmail.domain.com:443 username DIRECT/12.145.#.56 -
> Thu Sep 4 13:51:39 2008 44735 10.52.15.128 TCP_MISS/200 302531 CONNECT
> webmail.domain.com:443 username DIRECT/12.145.#.56 -
> Thu Sep 4 13:51:39 2008 44739 10.52.15.128 TCP_MISS/200 180145 CONNECT
> webmail.domain.com:443 username DIRECT/166.73.#.139 -
> Thu Sep 4 13:51:39 2008 44739 10.52.15.128 TCP_MISS/200 175494 CONNECT
> webmail.domain.com:443 username DIRECT/12.145.#.5 -
>
> Is this a Squid DNS caching problem? Is it a problem with the webmail
> site
> not maintaining a session between the proxy server and the mail server?
> Is
> there a way to have the Squid proxy use a consistent IP address for a URL
> instad of a new DNS lookup? We're running squid-3.0.STABLE6.

balance_on_multiple_ip off

This is a known problem, and will be off by default in 3.1 and later.

Amos
Received on Sat Sep 06 2008 - 09:52:16 MDT