View the Most Wanted LQ Wiki articles.
Go Back > Forums > Linux Forums > Linux - Security
User Name
Linux - Security This forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.


  Search this Thread
Old 01-15-2006, 01:46 PM   #1
LQ Newbie
Registered: Jan 2006
Posts: 11

Rep: Reputation: 0
Test if port address translation is working


I need to apply port address translation to my LINUX Firewall to all internal traffic destined for the outside and beyond.

Whilst I have managed to find an IPtables script to set this up, I need to find the best way of testing if the firewall is correctly configured, so that all internal traffic passing through the firewall has the ip address of the firewalls external interface.

Likewise I need to test that two simultanous connections can be made to the outside world from the internal network - and that they share the same IP address but have different port numbers.

Can someone give me some advise on the best thing to use to test the above? Would I use nmap scans? I dont really know, and searching on Google hasn't really helped.

Thanks in advance!

Old 01-17-2006, 07:01 AM   #2
Brian Knoblauch
Registered: Jan 2005
Distribution: SuSE (x86), NetBSD (Sparc), Solaris (Sparc & 32-bit x86)
Posts: 281

Rep: Reputation: 30
Open a pair of ssh sessions from 2 inside machines to a single outside machine. If both inside machines are able to operate the ssh connections at the same time without weirdness, then you're good.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Network Address Translation ashutoshsharma Linux - Networking 0 01-12-2005 07:06 AM
base address and port address Nodren Linux - Hardware 0 08-30-2004 02:54 PM
Network Address Translation for NFS not happening! Vincent_Vega Linux - Networking 4 01-09-2004 06:57 PM
"fast network address translation" kernel option dunkyb Linux - Networking 0 04-20-2003 06:42 PM
IP address translation? mikeshn Linux - Software 5 05-25-2002 05:51 AM

All times are GMT -5. The time now is 11:38 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration