Review your favorite Linux distribution.
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 07-19-2005, 09:53 AM   #1
Registered: Jul 2005
Posts: 50

Rep: Reputation: 15
funny new firewall rule

I'm just starting to learn Linux firewalling and iptables --- unfortunately almost all of the information that is on an introductory level is years out of date and mainly for other *NIX versions. This is true for both online resources and what's at the local library. Can anyone point me towards a good online resource for this?
Am I supposed to have this line in my firewall rules (this is from an "iptables -L" command):
ACCEPT udp -- anywhere udp dpt:5353
I don't think it was there yesterday, but I'm not sure. I haven't doner any modifications and this is a fresh install.
Old 07-19-2005, 10:14 AM   #2
Registered: Oct 2003
Location: St Paul, MN
Distribution: Fedora 8, Fedora 9
Posts: 513

Rep: Reputation: 30
Traffic on udp/5353 is multicast DNS, and IP addresses and above are used for multicasting. If you're not using multicasting, you can remove it but it won't be doing any harm so there's no real need to get rid of it.


man iptables
as a good place to start for iptables info.
Old 07-19-2005, 12:06 PM   #3
Registered: Jul 2005
Posts: 50

Original Poster
Rep: Reputation: 15
Old 07-19-2005, 12:39 PM   #4
Senior Member
Registered: Mar 2003
Distribution: Fedora
Posts: 3,658

Rep: Reputation: 65
Also take a look at:


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
Rule for internal ping on firewall Centinul Linux - Networking 3 08-27-2005 10:41 AM
newbie - firewall rule danimalz Linux - Security 3 07-30-2005 08:25 AM
APF Firewall Rule Help embsupafly Linux - Security 1 03-09-2005 12:00 AM
is this firewall rule safe? melinda_sayang Linux - Security 1 12-21-2004 08:44 AM
Need A Firewall Rule linuxboy69 Linux - Software 1 11-26-2003 05:29 PM

All times are GMT -5. The time now is 05:03 AM.

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