block request from telnet using iptables

dlugasx · 11-30-2011, 11:45 AM

Hello Gurus,

question like in the subject.
Is it possible to block telnet request

for example:

Code:

telnet www.myexample.com 80

or

Code:

telnet myserver.com 22

using iptables ?

One big virtual beer + reputation point for person which know the answer!

greetings

Dlugi

acid_kewpie · 11-30-2011, 11:58 AM

no, that's impossible. You'll only see a TCP connection wether it's a real UA or telnet.

(well, tbh you could probably use the iptables match module, but that's just awful, seriously... don't.)

Why do you want to do this? When this kind of question is asked, it typically stems from not fully grasping the situation. there is nothing wrong with doing this. it will not help you achieve a better system.

dlugasx · 12-01-2011, 05:14 AM

Quote:

Originally Posted by acid_kewpie

no, that's impossible. You'll only see a TCP connection wether it's a real UA or telnet.

(well, tbh you could probably use the iptables match module, but that's just awful, seriously... don't.)

Why do you want to do this? When this kind of question is asked, it typically stems from not fully grasping the situation. there is nothing wrong with doing this. it will not help you achieve a better system.

It seems that I have forgot to read docu about telnet. Now its clear.

Virtual beer for You

))