Visit Jeremy's Blog.
Go Back > Forums > Linux Forums > Linux - Networking
User Name
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.


  Search this Thread
Old 06-11-2010, 12:42 PM   #16
Senior Member
Registered: Jul 2009
Distribution: OpenSuse 11.1, Fedora 14, Ubuntu 12.04/12.10, FreeBSD 9.0
Posts: 1,571

Rep: Reputation: 92

As long as 4 boxes are Linux it makes life easier.
I hope you know IP addresses of your asterisk.
I will use your picture:
Asteris 1 ------- FWA ---------- FWB -x--------- Asterisk 2
Please, on FWA execute command:
tcpdump -nnt src <IP of the Asterisk 1> -i <FWA INPUT interface>
You will see what asterisk #1 sends to FWA. Then you can execute it on FWB and compare those outputs.
It gives you an idea of what comes to FWA (without any changes by firewall) and what FWB receives.

Then execute that command on Asterisk 2 you will see what comes through FWB.

Try, it may give you many interesting details.

P.S. I added input interface, because FW has 2 interfaces, where tcpdump can catch source IP, so you need to specify one you need.

Last edited by nimnull22; 06-11-2010 at 02:59 PM.
Old 06-11-2010, 03:44 PM   #17
Registered: Jun 2010
Posts: 31

Original Poster
Rep: Reputation: 1
Thanks nimnull22,

I did what you told me about tcpdump and the packet was disappearing on the last interfase of the last fw. No packet droped at all according to the logs.

But more important is... the problem was extrangely gone now. I don't know why. I did not do anything and I tend to think people in charge of asterisk servers changed something on these boxes, although they say no.

It is maybe too soon to claim victory, but thanks a lot for your help, and I will post again if the problem returns.


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
Inquiry on Asterisk VOIP depam Linux - Software 2 02-08-2010 09:19 AM
Asterisk Predictive Dialer need VOIP adapters to Make a VOIP call... jpmaxyusuf Linux - Server 4 04-05-2009 08:12 AM
Home VOIP phones??? asterisk??? jantman Linux - Networking 0 10-23-2006 08:31 PM
What ports do I need to open for Asterisk VOIP? depam Linux - Software 1 10-05-2006 10:48 PM
Asterisk VOIP implementation doubts bharathvn Linux - Networking 5 02-07-2006 03:47 AM > Forums > Linux Forums > Linux - Networking

All times are GMT -5. The time now is 05:53 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