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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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Why smtp server can not be telnet?

https://www.webdigi.co.uk/blog/2009/how-to-check-if-an-email-address-exists-without-sending-an-email/ I am following the above instruction to telnet an email server of gmail. But I got an error. Could anybody let me know what is wrong? Thanks. $…
user1424739
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Cancel Telnet prompt WITHOUT closing connection?

I opened a Telnet connection from a Linux machine, and hit Ctrl + ] to bring up the telnet> prompt. How do I drop out of this prompt and go back to my session without closing the Telnet connection? There weren't any breadcrumbs in help, and pressing…
Dan
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Trying to set up mail forwarding via postfix on Debian - cannot make telnet connection on port 25

So I've been working on this problem for a few days and I'm at a loss. I have installed postfix on Debian with the intent of setting up some forwarding addresses for a specific domain. I believe that postfix is setup correctly, but I can't validate…
dirknibleck
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How to get telnet working in SCO openserver release 3.2v5.0.6?

I have a sco box (SCO openserver release 3.2v5.0.6) and I went and changed the ip address of the server via netconfig. Sadly, telnet is no longer working when I attempt it from another computer to the sco box. Locally it telnets fine from the sco…
Vaishal Patel
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not getting the response from the webserver for the request GET /

When I telnet my server it is getting connected, however after telnet connection if I request for GET /, it is not giving any response. But, after telnet connection if I request for GET / HTTP/1.1, it is giving me response. May I know this is a…
balaji
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Can't telnet to memcache server

I'm trying to connect the application server to the memcache server. App Server 12.12.12.12 Memcache Server 13.13.13.13 Memcache Port 11211 I've tried the following. Ping from 12.12.12.12 to 13.13.13.13 works telnet 13.13.13.13 80 works telnet…
Peter Fox
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Is it possible to access a Telnet server via SRV-Record?

I wanted to make a little telnet server using PHP as an addition to my website, which already looks like a terminal. I could create the telnet.example.com-subdomain, but that will take away the effect of the website beeing an actual terminal. The…
Sainan
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Telnet test pop3

I have problem with using POP3 to recieve e-mail from my VPS. In Mail app I'm getting message, that connection failed and I should check login and e-mail anyway, it's good. I try to check it via bash: telnet mail.inovestudio.com 110 Trying…
user1870556
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Sending commands to a set of session

In SecureCRT there is an option to send one command to all opened sessions (mainly for telnet/ssh connections). Does somebody familiar with some free program which can run on Windows that can do the same? BR
user1977050
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Telnet from Unix to Windows

I'm trying to telnet from a Unix (specifically, Mac OS X) laptop into a server running Windows Server 2008 R2, but am experiencing some issues. The connection is made successfully, but I can't backspace or cycle through command history with the…
Ken Blake
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Postfix - No greeting on telnet command

I'm trying to install Postfix with Dovecot and MySQL on CentOS 5. I'm new to this and I'm struggling on this more than 2 weeks. I followed this instruction…
Vahan
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Is port 21 active?

I have recently installed sftp (secure shell ftp) into proftpd. Knowing that the default port for sftp is 22, I have also changed the port value from 23 to 22 in /etc/proftpd.sftp.conf. So I expect it only to work through this port. Yet when I…
developer
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How to limit telnet access to only local network users in Cisco

I need to make so that my telnet service is only reachable by local users, not by anyone from outside in Cisco Packet tracer. Any suggestions please? https://i.stack.imgur.com/ZAd9L.png
user203330
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HP-UX - Telnet to terminal

I would like to use a run of the mill linux VM to connect to an existing HP-UX server through telnet. When I connect using the simple: telnet xxx.xxx.xxx.xxx I get my login prompt and everything seems fine; however, once I am logged in, the screen…
pspahn
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powerconnect 2848 telnet commands

I would like to find out which IP addresses are on which ports, or when I disconnect a cable to show me which port just dropped? Anyone out there who can shed some light on the telnet commands available or perhaps a cheat sheet of sorts?
sean
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