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Which TCP port does Kazaa use to communicate?

sashi
1,754 Recognized Expert Top Contributor
Hi guys,

I was wondering if anyone can guide in the correct direction. I was told that Kazaa doesn't use a predefined port, is this true? There has to some default port being use for some sort of action right? Does anyone here have any idea on this matter?

I need to prevent users from using Kazaa in a corporate network environment, am only able to that provided if i can trap the port used by Kazaa. I can set-up firewall rules to drop / reject packets destined to that particular port, this is the best way to block port / services in Linux.

Hope someone can provide some answer, thanks a million in advance.

Sashi.
Dec 7 '06 #1
8 15012
sashi
1,754 Recognized Expert Top Contributor
Hi guys,

I came across an interesting link, according to the article Kazaa is designed to use port 80 if the default port 1214 is unavailable or blocked. I this true? Yes, the asnwer is true.

I did a little experiment, i blocked both inbound / outbound packets movement on port 1214 (TCP/UDP). I came to a shocking end when i learnt that users are still be able to use Kazaa happy everafter. How do i block Kazaa? It's not possible for me block port 80, isn't it?

Kindly refer to below attached link, it's a very resourceful link, hope it helps. Good luck & Take care.

PORT NUMBERS / Network Services (IANA)
Tips for msn,yahoo,kazaa
Dec 7 '06 #2
sashi
1,754 Recognized Expert Top Contributor
Hi guys,

These are sets of firewall rules am using to block Kazaa at the moment, hope someone can fine tune the below attached rule sets. Good luck & Take cae

Thanks in advance.

Expand|Select|Wrap|Line Numbers
  1.   iptables -A FORWARD -p tcp --dport 1214 -i eth0 -j REJECT
  2.   iptables -A FORWARD -p udp --sport 1214 -o eth0 -j REJECT
  3.  
Dec 7 '06 #3
FuerzaDelDios
10 New Member
u can check the ports being used by netstat -l

or u can look in /etc/services.

hope that helped.

regs,
FDD
Dec 11 '06 #4
FuerzaDelDios
10 New Member
u can take a look @ the followin link...

http://www.linuxforums .org/forum/linux-security/60698-iptablesfirewal l-port-block-not-working-urgent.html
Dec 11 '06 #5
FuerzaDelDios
10 New Member
For present state of network & connections(on your localbox)..

netstat -plant //for tcp netstat -planu //for udp




For checking open ports(for local as well any other box connected)

nmap -P0 -sT -v host-ip/name
Dec 11 '06 #6
FuerzaDelDios
10 New Member
Another suggestion:

u can capture the packets using ethereal.

First start ethereal, then run kazaa. The application should send some control packets when it comes up. That should tell u the default ports being used.

Hope that helped.

FDD
Dec 11 '06 #7
sashi
1,754 Recognized Expert Top Contributor
Another suggestion:

u can capture the packets using ethereal.

First start ethereal, then run kazaa. The application should send some control packets when it comes up. That should tell u the default ports being used.

Hope that helped.

FDD
Hi there,

A million thanks to you, the details provided really helped me alot. Good luck & Take care.
Dec 12 '06 #8
FuerzaDelDios
10 New Member
no problemo.. :)
Dec 12 '06 #9

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