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<TITLE>The Answer Guy 48: Telnet trouble</TITLE>
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<H4>"The Linux Gazette...<I>making Linux just a little more fun!</I>"</H4>
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<H4>By James T. Dennis,
<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a><BR>
LinuxCare,
<A HREF="http://www.linuxcare.com/">http://www.linuxcare.com/</A>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
height="50" width="60" alt="(?) " border="0"
>Telnet trouble</H3>
<p><strong>From Mathew on Sat, 25 Sep 1999
</strong></p>
Dear Jim
</UL>
<P><STRONG>
Your email did help me to solve the problem with the telnet in
linux. It works fine now. Thanks a million.....
</STRONG></P>
<P><STRONG>
I have a small doubt. Let me explain...... My network has a NT
server, LINUX server and 20 windows 95 clients. I followed your
instructions and added the address of all the clients into the
<TT>/etc/hosts</TT> file on the LINUX machine and voila the telnet worked
immediately.
</STRONG></P>
<P><STRONG>
But the NT server was the one who was running a DHCP server and
dynamically allocating the addresses to the clients. The clients
were configured to use DHCP and were not statically given and ip
addresses. I managed to see the current DHCP allocation for each
client and add those address into the <TT>/etc/hosts</TT> file on the LINUX
server but my doubt is what happens when the DHCP address for the
client changes? Then again we'll have to change the address in
the <TT>/etc/hosts</TT> file right? This seems silly. Is there anyway to
make the LINUX hosts file to automatically pick up the DHCP
address from the NT server?
</STRONG></P>
<P><STRONG>
Also another important thing is I am still unable to ping from the
NT server to the LINUX server using the name. It works only with
the IP address. Is there any way to make the NT DHCP to recognize
the LINUX server?
</STRONG></P>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
Well, either you shouldn't use dynamic addressing
(DHCP) or you should use dynamic DNS. You could
also disable TCP Wrappers (edit your <TT>/etc/inetd.conf</TT>
to change lines like:
</BLOCKQUOTE>
<blockquote><pre>telnet stream tcp nowait root /usr/sbin/tcpd in.telnetd
</pre></blockquote>
<BLOCKQUOTE>
... to look more like:
</BLOCKQUOTE>
<blockquote><pre>telnet stream tcp nowait root /usr/sbin/in.telnetd in.telnetd
</pre></blockquote>
<BLOCKQUOTE>
(and comment out all of the services you don't
need while you're at it).
</BLOCKQUOTE>
<P><STRONG><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
Thanks Jim for all your help....you've become my LINUX
guru.............
</STRONG></P>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
Perhaps you should consider getting a support
contract (or joining a local users group). I may
not always respond as quickly nor as thoroughly
as you'd like.
</BLOCKQUOTE>
<P><STRONG><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
Best Regards
bob
</STRONG></P>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
>Copyright &copy;</a> 1999, James T. Dennis
<BR>Published in <I>The Linux Gazette</I> Issue 48 December 1999</H5>
<H6 ALIGN="center">HTML transformation by
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