Re: [squid-users] DNS not caching properly

As a temporary fix, I have manually coded in one of the addresses in /etc/hosts, but this is not the kind of
solution I would like to be stuck with as it defeats the purpose of using round-robin DNS entries.

Also, using Squid 2.4 on Solaris 8.

Mike

Michael K Bender wrote:
>
> I had written earlier today about a problem with an ASP page that I was having problems with. I have
> discovered and remedied, somewhat, that problem. However, now I have another problem.
>
> There is a server that I am trying to connect to: time.records.com (example)
>
> This server name is aliased to time.card.records.com and has 3 IP addresses. Each of these three IP
> addresses, also, is aliased to names (time1.card.records.com, time2, time3). If I put as my URL
> time1.card.records.com the proxying works fine and I can browse through and use the ASP pages. However, if I
> use time.records or time.card.records, I have problems. If I look through a snoop log of the connection
> between my squid server and time.records.com I find that squid seems to randomly send packets and responses to
> different time1, time2, or time3 servers. The DNS is using a round-robin system to determine which IP is
> returned when a lookup is performed on time.records.com, but I thought that squid would cache the IP it
> received for the positive TTL time (still default 6 hours). It appears to be performing a new DNS lookup
> every time it has to send a packet to the server, and it is getting a different one, which is confusing the
> ASP page.
>
> The ASP page sends a Cache-control=private header which prevents squid from caching it. Does this also
> preclude squid from caching the DNS entry? If so, is there any way to fix this problem?
>
> Mike
> --
> *==========================================*
> # Mike Bender Marlboro System Managers #
> # benderm@sels.rsc.raytheon.com #
> # 508.490.2849 #
> *==========================================*

-- 
*==========================================*
# Mike Bender     Marlboro System Managers #
#     benderm@sels.rsc.raytheon.com        #
#            508.490.2849                  #
*==========================================*