How to filter HTTP traffic using SquidGuard in Ubuntu

Posted August 5th, 2007 by sugree

Most offices have internet access especially for managers and employees to read and compose e-mails with customers. Anyway, everything has their bad side so most employees will try to access other things consuming more traffics, e.g., music videos, video streaming, songs and many more. As a result, e-mail applications may slow down. Since most of them will also have proxy to save valuable bandwidth and a popular one is Squid, [SquidGuard][] is able to help controlling internet usage for unimportant purposes.

Installing SquidGuard in Ubuntu is very easy by just a simple command.

sudo apt-get install squidguard

After that, you have to configure Squid and SquidGuard itself to know how to deal with specific hosts and urls.

Add below line to /etc/squid/squid.conf.

redirect_program /usr/bin/squidGuard -c /etc/squid/squidGuard.conf

Configure what you need in /etc/squid/squidGuard.conf. Below is mine.

dbhome /var/lib/squidguard/db
logdir /var/log/squid
 
time workhours {
    weekly mtwhfa 08:00-12:00
    weekly mtwhfa 13:00-16:30
}
 
src admin {
}
 
dest streaming {
    domainlist      streaming/domains
    urllist         streaming/urls
    log             streaming.log
    within          workhours
}
 
dest antivirus {
    domainlist      antivirus/domains
    urllist         antivirus/urls
    log             antivirus.log
}
 
dest download {
    domainlist      download/domains
    urllist         download/urls
    log             download.log
}
 
 
acl {
    admin {
            pass     any
    }
 
    default {
            pass            !streaming !antivirus !download any
            redirect        http://www.google.com/
    }
}

Create directories according to all rules in /var/lib/squidguard/db.

sudo mkdir /var/lib/squidguard/db/streaming
sudo mkdir /var/lib/squidguard/db/antivirus
sudo mkdir /var/lib/squidguard/db/download

Then define all rules according to above squidGuard.conf. For example, see my files below.

/var/lib/squidguard/db/antivirus/domains

liveupdate.symantecliveupdate.com
liveupdate.symantec.com
guru.grisoft.com
downloadfree.grisoft.com
consumerdownloads.ca.com

/var/lib/squidguard/db/streaming/domains

sqm.msn.com
msgr.dlservice.microsoft.com
d1.766.com
us.bitcomet.com
reports.hotbar.com
download.windowsupdate.com
download.microsoft.com

/var/lib/squidguard/db/streaming/domains

streamcaster.siamportals.com
contents.ikeyclub.com
radio.sanook.com
www.youdumv.com

Don't forget to change owner of these files.

sudo chown -R proxy:proxy /var/lib/squidguard/db

And now it is ready to rebuild database.
```
sudo squidGuard -C all
```
We are ready to restart Squid.
```
sudo /etc/init.d/squid restart
```

Tags: squid, squidguard

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How to filter HTTP traffic using SquidGuard in Ubuntu

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