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Check for open outbound ports

Posted on 2008-06-19
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Last Modified: 2012-05-05
How can I check which outbound ports are open on my firewall without accessing the firewalls OS.  I can use "telnet IP address port number" to access an active outbound port.  But I need to check avaliable outbound ports that could be used in the future.

I hope this makes sense.

Thanks
-Brian-
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Question by:bmcdowell540
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kanlue earned 2000 total points
ID: 21829016
Hi Brian,

you can use 'nmap' to scan your fix to find the open ports.
here is the info and the link:
---------
Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing.

http://nmap.org/
---------

hope it helps.

-kanlue
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Author Closing Comment

by:bmcdowell540
ID: 31468988
Thanks, this is exactly what I was looking for.
-Brian-
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