I get "connection to host lost" upon attempting to telnet into a 2003 SP1
server using MS TN client & server and password authentication via domain.
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 authentication, 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.
Netstat shows telnet is listening on port 23. I tried changing both
ends to use port 25 instead of 23, no change.
What am I missing?
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