How do I view my firewall?
 

I just built my firewall with fwbuilder. I'm running Ubuntu 9.04 and I would like to view the new firewall. Is it possible? If yes how? If no how do I check if it's working? And how can I see which ports are blocked and which are listening?

You can use nmap from an external computer.
However there are sites where you can test the firewall.
http://www.google.be/search?q=online...ient=firefox-a

Go to www.grc.com and hit 'shields up' to test all your ports.

Is there a way to check your firewall internally? Or to see of it's even up form the commandline or some graphical interface?

as root

But it's not very user friendly at all!.

To the OP, if you do the suggested listing and see any entries marked DROP or REJECT your firewall is at *least* partially working.

why partially ?
why "not very user friendly at all!" ?

The OP wants to know if the firewall is running.

To check if and how your firewall works you can add that line:

to /etc/syslog.conf and then use that command:

In result system logs will be displayed on twelve console.

To see system logs press Ctrl+Alt+F12. To come back to X Window press Alt+F7.

The above commands and files work with Slackware. In your distribution it can be other commands and files.

w1ko I dont have a /etc/syslog.conf file, is there another way?

for viewing your firewall

give below command

iptables -nvL


this will give you complete description.

Depends on you distribution, take a look in
/var/log/*
However, if the log option isn't setup in your firewall, there won't be much info in the logfiles.

Go to ``Distributions'' forum: http://www.linuxquestions.org/questi...stributions-5/, select your distribution, start new thread, quote my post: http://www.linuxquestions.org/questi...3/#post3644616, and ask how you can do it in your distribution.

Thanks a bunch everybody:)

If it's possible write here how you finally resolved your problem. It'll be nice for future readers of that thread to get to know your solution. We all are curious too.