Re: [squid-users] Squid cache problem

Amos Jeffries wrote:
> George wrote:
>> Hi,
>>
>> I've set up the following acls/outgoing_ip settings in my squid:
>> acl ip1 myip 1.1.1.1
>> tcp_outgoing_address 1.1.1.1 ip1
>>
>> for each IP I have on the server. I need this to be able to use each
>> IP of the server as the outbound one.
>>
>> The problem is that if I use IP 1.1.1.1 then I can't switch to IP
>> 1.1.1.2 without restarting squid or without waiting about 10-20
>> minutes. It is caching.
>>
>> How can I disable this caching?
>>
>> I've put: cache_dir null /null
>> but it does not help solve my IP caching problem.
>>
>> How can I disable the squid caching completly?
>>
>> I have squid-3.0.STABLE7-2 running on CentOS 4
>>
>> Thanks
>>
>
> Squid receiving IP (myip) and sending IP (tcp_outgoing_address) are
> re-evaluated for every single outgoing connection. There is no caching
> of IPs involved.
>
> Perhapse you have a 10-20 minute cycle on DNS IPs which your browser
> is using to connect to Squid with.
>
> Perhapse you have persistent connections in use, which may cause a
> particular link to or from Squid to be re-used for different requests.

 From experience this is the most likely. Make sure
server_persistent_connections is set to off (it's on by default) if you
want to change the outgoing IP for sequential connections to the same site.

> Perhapse what you are tying to do is not good network engineering.
> Why is it so very important to you that in/out IPs are forcibly linked?

For me, I have a central web filter that doesn't understand the concept
of X-Forwarded-For. Using the combination of myip and
tcp_outgoing_address allows me to run one instance of Squid on each of
my remote servers, but allow different filtering categories based on
which IP a customer connects to.

>
> Amos

Chris
Received on Fri Jan 23 2009 - 22:53:46 MST