Questions tagged [telnet]

An unencrypted client/server protocol for remotely accessing another system.

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in.telnetd Disables encryption support negotiation

in.telnetd Disables encryption support negotiation i try to disable the encryption support negotiation in.telnetd this is options file of telnet-server lib on linux i have install telnet-server on my ...
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Is there a generic wrapper or server to serve applications over telnet?

Is there some sort of generic wrapper or server to serve single TUI-applications over telnet? For example I would like to serve the lynx text-based web browser over telnet so people could browse the ...
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SSH or telnet as an unpriviledged user leads to 'socket: Permission denied' error

I'm running a strange 3.0.35 heavily patched kernel on an embedded device (Kobo eReader). Maybe it partly explains this issue.Basically: kobo:/$ ssh root@127.0.0.1 socket: Permission denied ssh: ...
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Not able to grep telnet output correctly

I am writing an script to verify connectivity for multiple external system with timeout of 10s. How do i avoid "Connection closed by foreign host" text from this script. I am doing grep only ...
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Unable to get PID on a Listening port for Solaris

I'm using solaris SunOS myhost4 5.11 11.4.42.117.3 sun4v sparc sun4v non-global-zone I'm sure that port 7777 is in use as the telnet is successful as below: $ telnet myhost4 7777 Trying 10.23.52.219.....
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Is there an alternative for xinetd that supports control characters?

I am writing a project that allows users to connect in and run specific commands. xinetd is an option but pressing Tab via either nc or telnet will type an indentation. Is there a net daemon that can ...
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Telnet error - "Connection timed out"

I am trying to telnet a port at a client's location. telnet someexampledomain.com 25 It shows: Trying someexampledomain.com... telnet: connect to address someexampledomain.com: Connection timed out ...
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Issue when installing telnet on centos8

I am trying to install telnet on a centos8 server but keep getting this error: I have also used dnf command(dnf install telnet) but get the same error message. I use the following on line tutorial ...
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Recording SSH/Telnet sessions with function keys (e.g. delete, backspace)?

For my thesis I am looking to record SSH/Telnet sessions which include function keys, such as delete and backspace. I am using a Cowrie SSH/Telnet honeypot (running in an Azure Debian VM) to record ...
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ufw won't allow connections to postgres port 5432

With ufw disable on remote postgres system i'm able to connect from my local system However, the connection does not work when I ufw enable as shown below: C:\Users\HOME>telnet 80.240.24.195 5432 ...
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How many simultaneous terminal pseudo connections can support my linux server?

My debian distribution has 62 virtual text terminal in /dev/tty. Does this mean that my server can support up to simultaneous 62 ssh or telnet connections? For each connection I note that it created ...
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Firewall is active, added port to iptables but still cannot connect

We have RedHat 8 server. Firewalld is active. I need to connect to port 5050 from my lap top and from the second server, so I added it to the rules iptables -I INPUT -p tcp -m tcp --dport 5050 -j ...
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Remove hostname from telnet login prompt / LOGIN_PLAIN_PROMPT on Ubuntu 20.04

I am trying to remove the hostname on the telnet login prompt to just display "login:" on Ubuntu 20.04. I understood while searching around that telnet is using the program login. I found ...
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Unable to connect telnet to mysql listen ip port from remote host

I m able to telnet locally to mysql process like below: I have also made sure MySQL process is listening on all IPs by setting bind-address = 0.0.0.0 as evident below: root@localhost:~# netstat -plutn ...
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Raspberry PI ArchLinux telnet server 4 times Login incorrect

I installed via pacman -S inetutils telnet and want to try to login via telnet but if i use telnet localhost to connect This comes up [root@alarmpi ~]# systemctl restart telnet.socket [root@alarmpi ~]#...
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Get screen serial port in remote

I have some industrial equipment with serial ports equipped. There are 2 serial ports on each one (COM1 /dev/ttySC0 and COM2 /dev/ttyAMA0). Before sending to production, to test the correct ...
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Grant access to a single machine

I am trying to create a client that only has access to one machine on the local network, similar to the example shown in the official OpenVPN guide. port 56620 proto udp dev tun user nobody group ...
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How to disable telnet on a Debian 11

As per title, how can I disable telnet on a Debian 11 server? I think I can (how?) block port using ufw, but... how can I disable the service itself? I tried systemctl disable telnet But Failed to ...
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linux telnet server check password file

in linux centos 7 linux using telnet server What is the name of the file responsible for checking the password, whether it is valid or not?
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centos 7 decrypt and encrypt library [closed]

I have installed telnet server in my centos 7. I need to make some modifications to the telnet connection to the server. I have a library to check telnet login. It is encrypted. I need a decoding ...
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listener message on port 23

I want to have a message to anyone that tries to telnet (port 23) to my server that they are connecting to the wrong port, then disconnects them. Basically something like socat would be ideal, but I ...
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Asynchronous json post requests with cURL, minimize overhead?

I think my method to make asynchronous post requests to API endpoint has some overhead. From stackoverflow I learned that libcurl is an alternative way but I am not familiar with libcurl and that with ...
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Help with a deciphering command with telnetd in it

Help with deciphering commands [ $1 -ge 20 ] && telnetd -p 233 -l /bin/sh I know /bin/sh is a Bourne shell and telnetd is a telnet daemon but I'm not sure how they work together. I think ...
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Telnet not working for a specific process

I have etcd process running on serverA on port 2379. I am trying to telnet to serverA from serverB and its showing connection refused. # telnet <IP_serverA> 2379 telnet: Unable to connect to ...
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Telnet not working for non root user RHEL 8.2

I am getting the following error when trying to use telnet in RHEL 8 telnet: Command not found. I have installed telnet and telnet-server however strangely telnet is working when i am the root users ...
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netcat / nc / telnet perform math on received data then output

I am not an expert on bash so sorry in advance. For my high school CTF competition, I have to read in 3 numbers, perform some arithmetic on them, then output the value back to the server. In ...
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Failed to start Telnet Server: "Unit telnet.service not found"

I am doing a research on Telnet communication and I need to test its communication although it is not secure. I have an Ubuntu machine 18.04 on my EC2 (I opened inbound port 23 for everyone in AWS). I ...
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Testing connectivity and port availability using SSH instead of Telnet

Assume that you have a pair of UNIX/Linux machines. You want to check if both machines can connect to each other via an arbitrary port, say, TCP 111. Log into the shell of Machine 1 (10.0.0.1). If ...
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How to establish tcp connection between host to vm using ssh or telnet

As a part of learning, I'm trying to establish a tcp connection between host and VM using telnet or ssh. I'm using linux-debian. After establishing connection, I'll try to analyse packets using ...
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What's the difference between the telnetd and inetutils-telnetd packages in Ubuntu?

Recently, a work came to me which needs to set telnet on linemode.so i install telnetd with apt install telnetd, which is controlled by inetd, and this operation will add new line telnet stream tcp ...
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How to connect to a telnet service by bash?

What I am trying to do is connect through telnet and download a database but I can't find the way to do it, I have tried it with python but it only closes the connections, so I would like to know if ...
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telnet & ping - different results

I'm trying to debug a private connection between to CentOS servers I'm trying to connect to MySQL from server 1 ( Web ) to server 2 ( MySQL ) On both I've setup the network devices with firewalld - ...
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Share Telnet connection as a proxy

i have telnet connection to device behind firewall (there is no SSH) and i want to use this connection as a proxy to give local network access to Firefox for example if is possible using Putty ...
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Telnet connection to Debian machine refused

I'm trying to connect Debian 8 machine via telnet but I get login error shown in below # telnet 192.168.88.48 Trying 192.168.88.48... Connected to 192.168.88.48. Escape character is '^]'. Debian ...
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How to determine Connection Refused Issue? [closed]

We have a linux server which runs a java process(Hazelcast) on port 5701. However, we are facing issue while connecting to that server and it result in a Connection Refused issue. Below are the ...
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Stay connected while executing a remote WGET command?

I use Putty to remotely login into SERVER 1 and issue a WGET to another SERVER 2 to make a backup of a large directory. My question is, do I have to stay connected while this process occcurs? Or, is ...
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Telnet: Connection refused for specific port only. [CentOS 8]

I am trying to connect from one server to another through its IP address using telnet as following: [root@01 ~]# telnet 10.10.7.7 6379 Trying 10.10.7.7... telnet: connect to address 10.10.7.7: ...
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Ping works, but I get 'No route to host' even though my firewall is off

I want to check if I can connect to Rspamd's Fuzzy port and have a very strange problem - I can ping a the host and get an answer (0% packet loss). But when I try to telnet him, I get "No route to ...
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vsftp server returning 500 Illegal PORT command when tried to run raw ftp commands in telnet

Currently, I am trying to run ftp commands from telnet client. I was successful with USER, PASS, PASV, LIST and when tried PORT vsftp server is throwing 500 Illegal PORT command. I am following the ...
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telnet refuses to connect when /bin binded to another location

I am working on a router and its firmware is read-only as expected. The busybox they used are trimmed down version of the original tool so i cannot use all the tools necesseray. This router has also a ...
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Keyboard input to a serial console redirected to telnet

I'm trying to install a Cisco Nexus 9000v VM on VMWare Workstation on a Linux machine. That's how far I got: After importing the .ova file I set up a serial console in the VM settings whereby I chose ...
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Why do I get connection refused when I telnet port 2194?

I'm setting up an OpenVPN access server and I continuously get the error "connection refused" on my client(s). So i decided to start debugging from the beginning (the server) and tried telnet 127.0.0....
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I want to print exact word from the command output

telnet test | grep -o Unable telnet: Unable to connect to remote host: Connection refused Only 'Unable' should be the result.
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How to generate invalid HTTPS request from command line?

So, I am interested, is it possible to send an invalid HTTPS request via command line in Linux, to receive the server's "Error 400" page? It's possible to generate an invalid HTTP request using "...
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Get all the open ports for a remote host in linux

Trying to connect to a particular port for a remote host. The host is reachable (checked via ping command) but the port is not accessible. Is there any way to check all accessible ports for that ...
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Dial-up vintage BBS access with agetty and a modem

I'm trying to setup a 80's service with Mystic BBS (that runs on telnet), including a dial-up access with a U.S. Robotics modem connected to the serial port of the server. I succeeded with mgetty: /...
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Can't download files through ZMODEM in Debian 10

I can't download files from any BBS I've tried so far using the ZMODEM protocol in Debian 10. So far, this is exactly what I have done: Marked the files I wanted to download from the BBS. Go to a ...
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telnet -l still asks for login

I'm trying to write a C library that connects and talks to a robot which has a telnet server. The server info is the following: user: as ip: 192.168.0.1 port: 23 it has no password In the ...
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Cannot telnet host from ec2 instance behind a proxy

Let me try to rephrase the whole question as it was not very clear the first time. I need to understand and workout port forwarding. I have an ec2 instance running behind a proxy server. I need to ...
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Sed with port forwarding in socat?

Not sure if this belongs on here, StackOverflow, or SuperUser. I have a device running a reverse telnet server that I need to be able to send/receive data to. I'm able to play with it if I run socat ...
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