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SQUID ACL Problem

This is a discussion on SQUID ACL Problem within the Linux software forums, part of the Linux Getting Started category; I have problem with squid I have a network of Ip Range 10.120.1.0/24, and i providing Net Access to clients ...


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Old 07-10-2006, 01:48 PM
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Default SQUID ACL Problem
I have problem with squid

I have a network of Ip Range 10.120.1.0/24, and i providing Net Access to clients by SQUID proxy server.

Now i want a acl that restrict some of the above IPs (10.120.1.1 - 10.120.1.50) to access some web sites and full access to some IPs (10.120.1.51 - 10.120.1.100).


I already created a file of web sites that has to be restrict.

That is working well.

But question is here that when i am applying this acl list to my squid all the IPs get restrict to access web sites that is in the list.

Pl. help me to out of this problem.
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Old 07-10-2006, 08:16 PM
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You need to setup ACL as follows

Sample ACL
Code:
acl fullAccess src 10.120.1.51 10.120.1.52 10.120.1.100 
acl RestrictedAccess src 10.120.1.1 10.120.1.2 10.120.1.50
acl RestrictedAccessSites dstdomain "/etc/squid/restrictedsites.txt"
http_access allow localhost
http_access allow fullAccess
http_access allow RestrictedAccess RestrictedAccessSites
Sample file /etc/squid/restrictedsites.txt
Code:
.cyberciti.biz
.yahoo.co.in
.google.co.in
.google.com
IP address 10.120.1.1-50 will allow to access only above four url. It can match both cyberciti.biz and forum.cyberciti.biz domain. And ip address 10.120.1.51-100 will allowed to access anything.

Restart squid. You can also use IP range (10.120.1.1-10.120.1.50/24) or put ips in text file.

If you need furher help just reply back
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Old 07-10-2006, 08:55 PM
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Thanks for the solution.

But one thing, that i want to restrict access to those website which are in txt acl file.
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Old 07-11-2006, 01:14 AM
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kasimani,

Have you tried out ACL as described by nixcraft? I am also interested to implement something like this. Let me know if it is working or not…
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Old 07-11-2006, 01:58 PM
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Default It works
It works, but my need is different that i already stated above.
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Old 07-11-2006, 02:31 PM
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I think your ACL is not correct. Especially related to IP address, because above ACL should only allow access to url mentioned in text file. SQUID ACL has one thing the placement of http_access rule should be correct. It is algo is such that if access is not allowed it will deny it or vice-versa. And which results into problem. So paste your complete ACL rule and will correct it out for you.
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Old 07-11-2006, 04:31 PM
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Default Full Squid Acl list
Defining an Access List
acl PrivateNet src 192.168.0.0/24 192.168.1.0/24
acl specific src 10.120.1.225-10.120.1.254/24
acl restnetwork src 10.120.1.1-10.120.1.224/24
acl deniedsites dstdomain "/usr/local/squid/etc/denied-sites/restriction.acl"
http_access allow specific
http_access deny restnetwork deniedsites

acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 563
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT

http_access allow manager localhost
http_access deny manager

http_access deny CONNECT !SSL_ports

http_access allow localhost
http_access deny all
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Old 07-11-2006, 07:59 PM
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Ok so user belong to ACL specific should only allowed to see deniedsites? Or do you want to block them from visiting all those site listed in ACL deniedsites?
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Old 07-11-2006, 08:36 PM
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Default Query
(acl specific src 10.120.1.225-10.120.1.254/24 ) For this range i want to allow full access on any site even on those site which are in restriction.acl

(acl restnetwork src 10.120.1.1-10.120.1.224/24) For this range i want to restrict those web sites which are listed in restriction.acl and rest of these sites this range can surf any web siets.
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Old 07-12-2006, 01:49 AM
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Ok here is correct ACL for you:

Code:
acl all src 0.0.0.0/0.0.0.0

acl PrivateNet src 192.168.0.0/24 192.168.1.0/24
acl specific src 10.120.1.225-10.120.1.254/24
acl restnetwork src 10.120.1.1-10.120.1.224/24
acl deniedsites dstdomain "/usr/local/squid/etc/denied-sites/restriction.acl"
http_access allow specific
http_access allow restnetwork !deniedsites

acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 563
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT

http_access allow manager localhost
http_access deny manager

http_access deny CONNECT !SSL_ports

http_access allow localhost
http_access deny all
Note that how rule is written:

http_access allow restnetwork !deniedsites

It means allow them to browse anything except site specified in deniedsites ACL. This is good to block illegal or pron site. ! act as not.
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