Ports Security

Hi,
I would like to know whether it is possible to block a specific port
number for outgoing or incoming connections? I am using windows 2000
professional and would like to know any solutions for the same.
For example, if I want to block a port number say 1255 for outgoing
connections but allow it for incoming connections.
Also can I do it dynamically, i.e. with out restarting my machine.
Any information would be of great help.

Thanks,
Abhishek.

Steven
Wed Feb 02 23:54:22 CST 2005

You need to use a firewall to manage port access for the services that you
want to access and provide. Windows 2000 does not have a built in one but
there are free for personal use ones like Zone Alarm and Sygate. You would
need to create custom rules to allow access to only those outbound ports
and/or applications that you want to allow access. By default all firewalls
will block all inbound traffic that is not a response to IP traffic you
initiated but you can change that. -- Steve

http://www.microsoft.com/technet/security/topics/networksecurity/firewall.mspx
-- info on firewalls.

"Abhishek" <abhi_narulkar@rediffmail.com> wrote in message
news:ONGXnfaCFHA.1536@TK2MSFTNGP14.phx.gbl...
> Hi,
> I would like to know whether it is possible to block a specific port
> number for outgoing or incoming connections? I am using windows 2000
> professional and would like to know any solutions for the same.
> For example, if I want to block a port number say 1255 for outgoing
> connections but allow it for incoming connections.
> Also can I do it dynamically, i.e. with out restarting my machine.
> Any information would be of great help.
>
> Thanks,
> Abhishek.
>
>

MAP
Thu Feb 03 00:41:04 CST 2005



"Abhishek" wrote:

> Hi,
> I would like to know whether it is possible to block a specific port
> number for outgoing or incoming connections? I am using windows 2000
> professional and would like to know any solutions for the same.
> For example, if I want to block a port number say 1255 for outgoing
> connections but allow it for incoming connections.
> Also can I do it dynamically, i.e. with out restarting my machine.
> Any information would be of great help.
>
> Thanks,
> Abhishek.
>
>
>
http://www.diamondcs.com.au/portexplorer/

Matt
Thu Feb 03 02:36:03 CST 2005

You can use the IPSEC filters built into Win2000 if you just need to block
specific ports...this will only be effective IF you only need to block a
few. If you're trying to block all BUT a few, use a personal software
based firewall (like zonealarm) or use a firewall appliance (like a Linksys)

Matt Gibson - GSEC

"Abhishek" <abhi_narulkar@rediffmail.com> wrote in message
news:ONGXnfaCFHA.1536@TK2MSFTNGP14.phx.gbl...
> Hi,
> I would like to know whether it is possible to block a specific port
> number for outgoing or incoming connections? I am using windows 2000
> professional and would like to know any solutions for the same.
> For example, if I want to block a port number say 1255 for outgoing
> connections but allow it for incoming connections.
> Also can I do it dynamically, i.e. with out restarting my machine.
> Any information would be of great help.
>
> Thanks,
> Abhishek.
>
>