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Article #56798

telnet firewall

#56798
From: Kendell Welch
Date: Wed, 18 Dec 1996 00:00
47 lines
2112 bytes
Hello all :)

I am a web developer for an ISP in Illinois.  Unfortunately, I am only 
beginning to learn their Linux system.  I am comfortable in the Linux 
environment, and am able to set up my own stuff, but when it comes to the 
multi-user stuff, I get lost.

Here is my problem:
The group that set up this ISPs server placed a firewall which denies telnet 
access to the server to most users.  Whenever you try to telnet, you get a 
message that says something like "Your host is not allowed to telnet to this 
host.  Connection Closed."  Some users, those specified in some configuration 
file somewhere I assume, are allowed telnet into the server.  As best as I can 
guess, the firewall goes to the system logs, looks up the IP of the user that 
is trying to telnet, and checks whether that specific user is allowed to 
telnet.

I need to:
1) Allow permission to my username to allow telnet access when I dial directly 
to this server.
2) If possible, specify certain usernames from other servers to allow them to 
access by telnet (I live 40 miles away and would like not to have to dial 
long-distance.)
3) Still limit most of the ISPs customers from having telnet access for 
security reasons.

Now, nobody that is at the ISP knows very much about firewalls, including me.  
But, if someone could give me instructions on what files to edit, I can go 
directly to the sever, access as root, and make the changes.

Thanks a lot.!!

Merry Christmas!!

P.S.  Please reply by email, I may not check this group often.



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Kendell Welch
Marketing Strategies International
http://www.tuscola.net/homepages/msi/msicom.html
Mahomet, IL

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From: kwelch@mah-online.com (Kendell Welch)
Subject: telnet firewall
Date: 1996/12/18
Message-ID: <599kvv$rna$2@news.cu-online.com>
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organization: CU Online -- Your one stop Internet provider!
newsgroups: aus.computers.linux