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Questions tagged [telnet]

For questions about Telnet, a protocol for bidirectional interactive text-oriented communication with remote hosts via virtual terminals. It is defined in RFC 854.

Telnet is a protocol for bidirectional interactive text-oriented communication with remote hosts via virtual terminals. It is defined in RFC 854.

Telnet provides no inherent security and so is becoming less commonly supported. On modern UNIX-like systems it is usually replaced with more secure and flexible SSH protocol.

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Thunderbird 15.0.1 cannot use Exchange 2003 SMTP

I'm having the strangest time getting a Thunderbird email client to connect to my Exchange 2003 server. I got the incoming IMAP account set up no problem, and I can receive mail. However sending mail will not work no matter what SMTP settings I…
speedreeder
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Telnet does not give a response

Some wireless access points are acting a little weird, so I want to reboot them every couple of hours. Luckily there exists a security flaw which lets me login as root through telnet when using port 1111 (without username and password). Now I want…
floorish
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Connections to host are sporadically successful with mysql_connect() and telnet, but I can always ping the host successfully?

When I try to connect to a host on my LAN with mysql_connect();, the connections succeed some of the time and fail at other times. I can always ping the MySQL server successfully, but when I try to use telnet to connect to it through port 3306, it…
woo's not wei
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Can I telnet from Linux to Windows when authentication is NTLM only?

I've got a Windows telnet server set up to accept NTLM only (password authentication mechanism is disabled). Is there any way to telnet to this server from Linux, using a "standard" telnet client found in Fedora core 6 (I can't find version…
David Resnick
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"Not all privileges or groups referenced are assigned to the caller." when connecting to Windows 7 Telnet

I'm trying to configure telnet server in windows 7. When I try make a telnet connection from another machine within the LAN, and I log in with the username and password of a administrator account, I get a "Not all privileges or groups referenced are…
tommi
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telnet server not executing commands

I am connected in a telnet session in linux environment, but when I type commands and press enter, nothing happens. The TCP connection is in established state and when I checked the packets, the server is just echoing back whatever I typed and not…
Jake
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How can I use PAM to restrict telnet login by user?

Regrettably I need to enable telnet for a single user on a Linux machine. Everyone else will have to use ssh. How do I configure PAM to restrict which users may login via the telnet server?
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How to specify "terminal-speed" option explicitly in native linux GNU telnet client?

I'd like to be able to set the terminal-speed option explicitly in a native Linux GNU telnet client. Some context to my problem: I'm unable to login to an HPUX host using telnet when the telnet process is created by a Java program. When I telnet to…
David Resnick
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Automate hop by hop telnet to Cisco router

I need to automate telnet to a Cisco router and get a "show version" result. The problem is, I need to first to telnet to A, from there telnet to B and then only be able to telnet to the Cisco router. I've tried below, but didn't…
zaidwaqi
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IIS7.5 non-http port routing

I am trying to use IIS7.5 as a way to route to vnc on different servers or virtual servers. I cant get http to work but not non-http protocols like VNC, telnet, etc. Is there a way to do that? example: site1.webaddress.com:5902 -->…
Mike Reeves
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What might be causing telnet not to work from the mail server?

We are having and issue with sending some emails to domains outside of our network. We fixed a reverse dns issue and it did not resolve all of the issues. We then realized that we could not connect via telnet over port 25 to these external mail…
FortunateDuke
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Linux restrict a telnet and rs323 user to only run a few programs

I have an embeded linux video server that I just finished. One of the features is that I have a telnet server as well as getty bound to an rs232 port which a user can log into to call a few programs which I have written for server configuration…
Jonathan Henson
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Why can't I exit an SMTP dialog by entering a dot?

I've just started to set up an SMTP server on one of my test boxes. Postfix is installed and running, however, when I try to end a message it just does not work. All the documentation I've seen says that when you insert a "." (period) on a new line…
Hinchy
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Telnet exit status are equal for connection refused and connection tiemout

I create a bash script that check the connection to an host with telnet. That's the core code: telnet $X 2404 < $TEST &>/dev/null if [ $? -ne 0 ] ; then echo -n "$X " >> $LOG_FILE echo "OFFLINE <---" >> $LOG_FILE else echo -n "$X " >>…
John
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How can I determine which users are authenticating via ftp or telnet?

I've inherited a system that has both telnet and ftp enabled. As both these send passwords in cleartext I want to disable them. But many users have never changed their ways to use sftp or ssh. And before I make the change I need to contact them.…
Gray Race
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