Squid Proxy Server configure

Squid -

Squid is a proxy caching server. If you are Linux sysadmin, you can use squid to control internet access at your work environment.
Packages- squid
Port No-  3128(TCP),2679 (UDP)
Daemon-  squid
Script-  /etc/init.d/squid
Conf file- /etc/squid/squid.conf
Requierd- 2 Lan card (eth0,eth1)

Configure Server Side-

 1-> Install Package
# yum install squid* -y
oaded plugins: refresh-packagekit, rhnplugin
Running Transaction
  Installing     : 7:squid-3.1.4-1.el6.x86_64                               1/1 
  squid.x86_64 7:3.1.4-1.el6 

# netstat -ntlp  (Show port)
# service squid restart


2-> Now configur conf file-->>

# vim /etc/squid/squid.conf

# uncomment
# Squid normally listens to port 3128
http_port 3128

#To block a particular Network:
acl my_net src
http_access allow my_net

#To block a particular ip:
acl bad_ip src
acl bad_ip src
http_access deny bad_ip

#To block a particular URL:
acl bad_site dst www.yahoo.com
http_access deny bad_site
#To block only one domain:
acl block_orkut dstdomain .orkut.com
http_access deny block_orkut

#To block a list of sites from / specified in a file:
acl block_list url_regex "/etc/squid/block_list.txt"
http_access deny block_list

#Blocking web access by time:
#acl aclname time [day-abbrevs] [h1:m1-h2:m2]
#h1:m1 must be less than h2:m2
#S - Sunday,M - Monday,T – Tuesday,W - Wednesday,H - Thursday,F - Friday,A - Saturday
acl mynetwork src
acl Break time MTWHFA 02:32-03:00
http_access deny mynetwork Break
#To block the URLs contains the word "word":
acl block_word_url url_regex sex
http_access deny block_word_url

#To prevent downloading files:
acl block_exe url_regex .*\.exe$
http_access deny block_exe

#To block access to some TLDs:
acl block_tld dstdom_regex \.uk$
http_access deny block_tld

3-> Now create block file and service restart

# cat >/etc/squid/block_list.txt

4-> Restart Service-

# /etc/init.d/squid restart
Stopping squid:                                            [FAILED]
Starting squid: .                                            [  OK  ]

# chkconfig squid on

Configure Client Side-

Open Firefox-->Menu--> Edit-Preference-->pic-1

-->Then Click Advanced--> Network--> Setting--> Pic-2

-->Type Proxy (SQUID)Server ip [] --> SQUID Port No. [3128]-->
Check use this proxy server for all protocols--> Thne click OK...

Now Open Browser and Check--

I hope You Like It..
So Enjoy...

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