Re: Telnet

[David B Swann <swann nosc mil>]

Your ISP may have something that prevents a remote site from logging into
your box.  Have you tried something like "ping" from both side to verify
the links are OK?  I would also try using traceroute to make sure the
routes are ALL OK.

Also, you probably have tcpwrappers installed.  You may want to run
telnetd outside of tcpwrappers.  It will also help if your machine is
resolving properly.  Is the client address registered?  I would suggest
that you edit/create a /etc/nsswitch.conf to use your /etc/hosts then your
dns server.  Most people leave this file in the default format which tries
to use nis and nisplus (these are seldom used methods to resolve).

I hope this helps.

 __________________________________________________________________________
| Bryan Swann (swann nosc mil)  803/566-0086   803/554-0015 (Fax)          |
| Eagan McAllister Associates, Inc.                                        |
|                                                                          |
|  "Everything must be working perfectly, cause I don't smell any smoke"   |
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On Fri, 26 Feb 1999, Brian Clark wrote:

> 
> Hi guys:
> 
> I have an easy one for you all, I'm sure, but I can't seem to find an
> answer anywhere in the HOW-TOs.
> I set up an account for a user, and I want to be able to let them telnet to
> my linux machine.
> 
> I Dial-in to an ISP via PPP in linux, and my IP address is a dynamic IP
> address.
> 
> When I, or this user, try to telnet to my linux machine, I get "connection
> lost."
> We are telneting to my machine's ISP assigned dynamic IP address (such as
> user60.XXX.XXX, and I have also tried the exact numerical address).
> 
> Is there something that I am missing here? I'm not trying to set up a
> dial-in server, I just want to be able to telnet to my Linux box when it is
> connected to the Internet.
> 
> Thanks -
> 
> Brian
> 
> P.S. I get the feeling that there is a security related reason as to why
> this isn't working (duh?), so what are the pitfalls if this is enabled? :)
> 
> 
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