Re: blocking remote telnet

the logs were showing me an address in Australia (which means user could be anywhere). I'm looking to see if thru any other listening server on a diff port than telnet (23) one can access terminal emulation and virtual terminals. What ever client they used was changing my existing virt devices to VT100.
By guesssing a know name (like qpadev0001) that did exist, it did not require creating a new virtual to connect.
I do see APPCoverTCP is running and wondering if a hacker can connect through that???
jim
----- Original Message ----- From: "Brian Lewis" <brian@xxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Wednesday, June 06, 2007 9:53 PM
Subject: Re: blocking remote telnet

Excerpts from Jim Franz's message of Wed Jun 06 20:40:10 -0500 2007:

Customer's network admin swears firewall blocks port 23 (telnet, both tcp&udp).
I tested remotely from windows, and telnet appears blocked.
But I have a couple pages of logs someone remotely trying to guess a password
for "root" and "admin", etc with existing virtual device names like qpadev0001.

I'd like to know more information from the logs. Do they give the source
IP addresses of the clients trying to log in?

If there really is no way to get to your system from the Internet, I
guess you have to conclude that the attacks are coming from inside the
network, perhaps from some compromised machine that *is* accessible via
the Internet.

--
Brian Lewis
http://www.i5sec.com/

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.