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RE: under attack
From: "Jonathan Pokrzyk" <jpokrzyk () matriximaging com>
Date: Wed, 17 Mar 2004 13:56:02 -0500

What ports did you have open to begin with that someone could've gotten
in.

-----Original Message-----
From: Security Zone [mailto:seczone () i-nfinity com] 
Sent: Tuesday, March 16, 2004 1:46 PM
To: Jorge Garcia
Cc: security-basics () securityfocus com
Subject: Re: under attack

On Mon, 2004-03-15 at 18:35, Jorge Garcia wrote:
i discovered in my redhat server a openssh port open in port 1945 or
somethin like that.
now i filter the port with iptables but i want to do more.
how can i close the port??

It depends on what starts it. As for me, i'd suggest you to check
xinetd.

how can i get info about who did this and which program or prosses is
using this port?
how can i get any inpho about the attacker??

Try and see log files! First of all /var/log/messages, then the logs
produced by sshd, and so on. I do not know so much iptables, i prefere
PF under openbsd... but i suppose that iptables supports log files! at
the very least, you'd know something about the IP...

thanx


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any course! All of our class sizes are guaranteed to be 10 students or less 
to facilitate one-on-one interaction with one of our expert instructors. 
Attend a course taught by an expert instructor with years of in-the-field 
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of an Ethical Hacker to better assess the security of your organization. 
Visit us at: 
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