Howto block or ban twitter and social network by squid proxy

Howto block or ban twitter and social network by squid proxy


1. Install squid proxy in your network

http://ithelpblog.com/os/linux/redhat/centos-redhat/install-and-configure-squid-proxy-on-centos-6-3-5-9-5-8-or-redhat-rhel-fedora-17-18/

2. Configure squid configuration to block facebook in your office

vi /etc/squid/squid.conf
#
# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl localnet src fc00::/7 # RFC 4193 local private network range
acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines
acl ithelpblog.com src 192.168.0.0/24acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
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
acl bannedsites dstdomain .facebook.com .twitter.com .yahoo.com
http_access deny CONNECT bannedsites
#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager# Deny requests to certain unsafe ports
http_access deny !Safe_ports# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on “localhost” is a local user
#http_access deny to_localhost#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
## Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
http_access allow localnet
http_access allow localhost
http_access allow ithelpblog.com
# And finally deny all other access to this proxy
http_access deny all# Squid normally listens to port 3128
http_port 8080# We recommend you to use at least the following line.
hierarchy_stoplist cgi-bin ?# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/spool/squid 100 16 256# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid# Add any of your own refresh_pattern entries above these.
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern . 0 20% 4320

forwarded_for off
visible_hostname ithelpblog

3. Start squid proxy

[root@localhost ~]# /etc/init.d/squid restart

4. Use Proxy on Web browser

Use Proxy on Firefox

Use Proxy on IE

Test go to twitter by firefox

Now twitter, facebook … etc are blocked, you can define more in squid configuration.

That’s all. Thanks for using IThelpblog.com.

 

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