block internet using centos

[suku]

i need to block internet connection for my users using the ip address of the user's computer.
i use centos to do this.but, i loss this work. so, please help me to solve this problem.

if you have another idea to do this,then you tell me.

please replay me. its very urgent

thanks>>>>>>>>>>>>>>>>>>>>>>

 

[Ijack]

http://wiki.centos.org/HowTos/Network/IPTables

 

[stillblue]

Google iptables and your operating system. That's the short answer. Long answer needs to know what server software you are using, I myself have Ubuntu server running Squid3 proxy.

 

[Ijack]

Long answer needs to know what server software you are using,

Centos - that's what the OP said.

 

[stillblue]

Long answer needs to know what server software you are using,

Centos - that's what the OP said.

I answered that way should someone else with similar problem visits the solution for them is there and so, in the event OP has a proxy installed iptables is not enough.

 

[suku]

i am using windows server 2003

 

[Ijack]

So why did you say Centos in the OP, and why did you post in the Linux forum? It doesn't make sense.

 

[stillblue]

i am using windows server 2003

Then you need to lookup windows server firewalls. Be advised that windows server 2003 is susceptible to a zero day virus that they have not patched yet, Microsoft recommends that you upgrade. Of course you could go back to centos or other Linux server and use IPTABLES.

 

[suku]

thanks for your help