Re: Fwd: [squid-users] URL redirection in offline mode

On Wed, Oct 6, 2010 at 6:54 PM, Amos Jeffries <squid3_at_treenet.co.nz> wrote:
> On 06/10/10 22:55, mohd hafiz wrote:
>>
>> ---------- Forwarded message ----------
>> From: mohd hafiz<bmhafiz_at_gmail.com>
>> Date: Wed, Oct 6, 2010 at 5:17 PM
>> Subject: Re: [squid-users] URL redirection in offline mode
>> To: Amos Jeffries<squid3_at_treenet.co.nz>
>>
>>
>> thanks for fast respon,
>>
>> my squid will have to operate in network up and down. it will just do
>> normal operation when the network is up. When the network is down,
>> squid will intercept all request from client and point it to local
>> server. i write a perl script to do the redirection.
>
> No need for that. redirect is automatic by prefer_direct. The local server
> just needs to accept the random domains passed to it by Squid.
>
you means i did not need the perl script? i used the perl script in
url_rewrite program /etc/squid/redirect.pl.

>> i have configure my cache_peer to:
>>
>> cache_peer example.com 3128 3130 default
>
> example.com being your "local server". Is that another proxy or a web
> server? The answer will determine whether you use port 3128/3130 or 80/0.
>
example.com is my web server

>>
>> and enable
>>
>> prefer_direct on
>>
>> but the browser still tried to reach the internet. it takes a few
>> minutes to resolve to my local page. any advised?
>
> Are you doing WCCP, NAT interception or transparent proxy?
>
i'm doing transparent proxy

> If yes,
>  the browser will be attempting and failing its own DNS to go direct to the
> Internet Squid cannot help here. Connectivity failover with a proxy is not
> easily compatible with interception.
>
is squid cannot function when the network is down? i know that squid
will do a dns lookup at the startup. squid will not start if it fails
dns lookup. i have tried to disable the internal dns lookup and still
problem exists. is there any way to solve this?
i also do a setup as below:
i have write a shell script to ping the network and write the status
to a text file. the perl script will read the text file
and do the redirection based on the output from the text file.

> If no,
>  Squid should be receiving an ICMP message from your router or its own
> outgoing NIC indicating the Internet is unavailable. If that is not
> happening you need to fix it.
>
>  connect_timeout value can be tuned to adjust the time Squid waits before
> attempting the peer. Squid will try connect_timeout (1 minute) for each IP
> of the website before attempting another route.
>
>  dns_timeout may also help if your DNS server is taking too long when the
> network is down. Default there is 2 minutes.
>
> Amos
> --
> Please be using
>  Current Stable Squid 2.7.STABLE9 or 3.1.8
>  Beta testers wanted for 3.2.0.2
>

thanks,
hafiz
Received on Wed Oct 06 2010 - 11:53:10 MDT