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Re: access control problems

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On Sun, 14 Mar 2010 08:30:53 -0700 (PDT), Landy Landy
<landysaccount@xxxxxxxxx> wrote:
> Hello.
> 
> I'm trying to block a all my users to use the internet except for a few
of
> them. I'm trying to do this with acl but, is not working. Here's part of
> the squid.conf:
> 
> # Port Squid listens on
> http_port 172.16.0.1:3128 transparent
> 
> # Access-lists (ACLs) will permit or deny hosts to access the proxy
> acl lan-access src 172.16.0.0/16
> acl proxy src 172.16.0.1
> acl localhost src 127.0.0.1
> 
> acl CONNECT method CONNECT
> 
> acl allowed src "/etc/ipaddress/ipAllowed"
> 
> # Access rule
> http_access allow proxy

Does it work when you remove the above line?

I've only seen that type of allow needed was when iptables rules got
broken by NAT happening on a remote box, changing all client addresses to
be identical to the proxy one.
The agents on the proxy box can be configured to use localhost safely.


> http_access allow localhost
> 
> #---- Block some sites
> 
> acl blockanalysis01     dstdomain .scorecardresearch.com
> .google-analytics.com
> acl blockads01          dstdomain .rad.msn.com ads1.msn.com ads2.msn.com
> ads3.msn.com ads4.msn.com
> acl blockads02          dstdomain .adserver.yahoo.com
> pagead2.googlesyndication.com ad.yieldmanager.com
> acl blockads03          dstdomain .doubleclick.net
> http_access deny blockanalysis01
> http_access deny blockads01
> http_access deny blockads02
> http_access deny blockads03
> 

NP: You can combine those ads lists to the one ACL name if you want an
easier config.

> #######################################
> 
> http_access allow allowed
> #http_access allow lan-access

Just to be clear and see exactly what is happening this would be good to
add right here in the rules:

  http_access deny all

> 
> 
> ---------
> in ipAllowed there are 4 ip addresses:
> 
> 172.16.250.1
> 172.16.250.12
> 172.16.254.13
> 
> Everyone is allowed to the internet.
> 
> What am I doing wrong?

Mostly looks good, all I can see is that NAT possibility. Your Squid rules
should be working as you wanted.

Amos

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