XP to 2003, "Connection to host lost". Used to work.

[Guest]

I get "connection to host lost" upon attempting to telnet into a 2003 SP1
server using MS TN client & server and domain authentication. This used to
work... I don't know what changed.

Client machine is XP SP1, using default MS telnet client. Server is 2003
SP1, running MS telnet server. Both machines are in the same domain, let's
call it "DOMAIN". Both are, managed or whatever, by AD. (I don't really
know anything about AD, sorry if that's the wrong terminology.)

I am logged on to my machine as DOMAIN\user1. I can log on to the server
directly, as DOMAIN\user1. My "DOMAIN\user1" is a member of Administrators,
and just for jollies, when it quit working, I tried adding it to the
"TelnetClients" group as well, no change.

If the telnet server configuration includes NTLM, I get "Connection to host
lost" instantly upon connecting via telnet, before it prompts for
userid/password.

If the telnet server does NOT include NTLM, I get prompted for userid. I
enter "DOMAIN\user1", and it asks for a password. At this point if I
deliberately enter an incorrect password, it tells me the password is
incorrect and asks me to try again - this is a good sign. However, when I
enter the correct password, whether the first time or on retry, I immediately
get "Connection to host lost".

If I enter "SERVER1\Administrator" for the userid, followed by the proper
password, telnet connects just fine. It only fails, and ALWAYS fails, when
the authentication is done by the domain.

What am I missing?

 

[Guest]

I forgot to add, netstat shows telnet listening on port 23, and I tried
changing it to port 25, same results.

 

[Bill Sanderson]

I think you are in the wrong group. These groups are related primarily to
Windows Defender/Microsoft Antispyware, and only secondarily to networking.

I'd say what you are seeing has the look of a bug--perhaps a side effect of
an update.

I'd recommend posting in a public group related to Windows Server--check
below here:

http://www.microsoft.com/windowsserver2003/community/default.mspx

for such a group.

 

[Guest]

Good heavens, you're right, this IS the wrong newsgroup - I don't even know
how I ended up posting in this one. Thanks for pointing me in the right
direction.