how to block VPN access

saranprasath91 · 02-04-2012, 05:15 AM

how to block the vpn access using some softwares or codes in the server?

klearview · 02-04-2012, 05:23 AM

For anyone to be able to answer you we'd need way more information about your current set-up - operating systems, network arrangements etc.

saranprasath91 · 02-04-2012, 05:42 AM

Quote:

Originally Posted by klearview

For anyone to be able to answer you we'd need way more information about your current set-up - operating systems, network arrangements etc.

I am doing my final year project and in my college we have access points every where and they have a Sonic firewall to block the social networking and other websites but my collegemates used to bypass the firewall through free VPN and anonymous tools.
So, i thought of doing a project to block the VPN access and other anonymous tools that allows the users to bypass the firewall.

devilboy09 · 02-04-2012, 05:47 AM

you can to this using iptables and block vpn ports.pretty easy!!!

saranprasath91 · 02-04-2012, 08:02 AM

Quote:

Originally Posted by devilboy09

you can to this using iptables and block vpn ports.pretty easy!!!

where to create the iptables and how to create it?
atleast please give some useful links to create a iptables.

devilboy09 · 02-04-2012, 08:31 AM

here's the commands that you should issue in shell(on firewall machine):

Code:

iptables -A FORWARD -s "internal-netrowk-ip-address" --dport 1723 -j DROP
iptables -A FORWARD -s "internal-network-ip-address" --dport 1701 -j DROP

and to save and restart iptables service, issue these command:

Code:

service iptables save
service iptables restart

TB0ne · 02-04-2012, 08:31 AM

Quote:

Originally Posted by saranprasath91

where to create the iptables and how to create it?
atleast please give some useful links to create a iptables.

Is Google broken where you live???
http://www.yolinux.com/TUTORIALS/Lin...rkGateway.html
http://www.higherpass.com/linux/Tuto...tables-Primer/

You could also type in "man iptables", and read the info.