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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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Telnet session - can't run commands

I have 2 VMs running CentOS 5.0 and I configured telnet on both of them. I can telnet from one to another... but when I type ls or cd at the prompt I get a message like this -bash: ls: command not found Please advise. Thanks
Joao Heleno
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Restore passwd for root on a server

      I have a DVR server with linux embeded. It has some telnet functions but i don't have the password for it (the chinese manufacturer refuses to give me the password). I did get a upgrade folder from them and found a passwd file…
s.mihai
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remote telnet and email

This issue has been occupying my work for the last few days and I will be understating when I say its driven me up the blasted walls. Essentially, I can ping and tracert the domain jnrcs.org and the subdomains mail.jnrcs.org and…
Mustafa Ismail Mustafa
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I can ping the PC from remote server but can't connect to a port

I did my research but I still can't figure out the solution. I want to connect to port 8888 of my PC from a remote server. When I ping my PC from a remote server with ping , it pings. When I try to connect to 8888 port using telnet …
daubs-05colobus
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RHEL Server Accepts Telnet from all Clients Except a Rocky Linux VM

I have a few VMs on a XenServer. One is a RHEL 8.7 running SSH server. Another is a Rocky Linux 8 client and also some other Ubuntu and Windows systems. The Ubuntu and Windows systems can telnet to the RHEL server just fine. The Rocky VM cannot. All…
techguy817
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How to exit from telnet in xterm (ctrl+], ctrl+'+', ctrl+d) don't work

Can't exit from telnet while connected to host. Commands like (Ctrl+], Ctrl+'+', Ctrl+D) etc. don't work. I have tried all the suggestions from keyboard shortcut to quit 'telnet'. Are there any other options available?
Dmitry Tarasov
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Not receiving any response from SMTP server after successfully connected via openssl or telnet

I am trying to set up my postfix using Gmail smtp relay server. I have set it up in other servers without issues, but I am having difficulty getting it to work in my work network. I tested if there is a network blockage by using telnet…
ricardo3889
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How do I read telnet data and save to a new log file every day?

I use to use Indigo Terminal Emulator from shadeBlue. I can't buy a license anymore, shadeBlue is not in business, and I had to migrate servers. I am using Putty to read my data and save it to a log file. I know I can put &M-&D-&Y for month-day-year…
javajoe316
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What is the name of the string that a service returns when you establish a tcp connection via telnet?

If you telnet to an ssh server, it will establish a connection and return a string, something like SSH-2.0-OpenSSH.... etc. Something similar happens if you connect to a mysql server. What exactly is the name of the string that the service returns?…
cat pants
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OCF resource agent/script for permanently checking tcp socket on layer 4?

How to utilize the OCF, Pacemaker and Corosync to permanently check the availability of a tcp socket? For the handling of certain services from within Pacemaker/Corosync I would like to constantly monitor a remote tcp socket. Similar to a…
M. Schmidt
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Telnet succeed but sending request with postman failed with `Error: read ECONNRESET`

Using telnet, I was able to check connection was established with port 443 on another PC (IP xx.xx.xx.xx) in my LAN. But sending a request with postman to https://xx.xx.xx.xx, I received ECONNRESET. What was wrong with my connection? How can I…
manaclan
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Cisco Switch - Enable Telnet using HTTP

I'm trying to automate the configuration process of a Cisco switch (SG-300). I was able to automate everything I need using telnet, but the last issue I still have is to enable telnet itself. For now I enable it using the web interface and my plan…
Outman
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Automate time and date through telnet

im not very clued up with telnet commands but i am looking to automate logins for a device we use in the field. we are having issues with Cmos batteries and every time the power goes out (6 times a day) we have to telnet into 2 devices then reset…
Warren
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How to telnet to a unix socket in debian to test memcached

To test memcached on Ubuntu, I would run this command: echo "stats settings" | nc -U /run/mydir/memcached.sock However now I have changed to Debian, and Debian nc does not support the -U option. I have tried ss, listen, telnet -b…
run_the_race
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Iptables + telnet not blocking ports

I have a Debian server from which I want to block all incoming and outgoing ports (especially all outgoing email ports), except those that I specifically add in iptables. The current setup I have is working and seems restrictive enough, but when I…
Sem van den Broek
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