Questions tagged [telnet]

Telnet is a client-server protocol used to allow communication between computers in a network.

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Telnet and shell scripting. maintain session open and send data while the script is in execution

I want to send two or more messages to a TCP server using telnet client from bash. This implies that I should maintain the session open while my script is in execution. For example, the script flow ...
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ZTE F609, telnet issue

I have modem ZTE F609 (Software Version V7.0.10P7N1) and I can't telnet it because of wrong login/password. I tried many different variants (all that Google and my imagination provided me:D), like ...
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difference between nc and telnet using smtp service as an example

I can use both nc and telnet to connect to port 25. $ nc 192.168.1.120 25 220 localhost ESMTP Exim 4.68 Tue, 29 Dec 2020 06:07:27 +0000 $ telnet 192.168.1.120 25 Trying 192.168.1.120... Connected to ...
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Can access a website using browser, but not able to access through telnet

I have a client vm machine with https & DNS provided. If I am trying to access that site in browser I can access, but when I try from application it gives connection timeout or connection reset (...
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Why does s3.amazonaws.com respond with 400 Bad Request when I connect over telnet?

This is what my request looks like. I have confirmed that the end of line separator is CRLF: telnet s3.amazonaws.com 80 GET / HTTP/1.1 Host: s3.amazonaws.com User-Agent: Mozilla/5.0 (Windows NT 10.0; ...
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1answer
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Connecting two computers using an Ethernet cable

When you connect two computers using an Ethernet cable (Crossover) you are technically using layer 1 and 2 technologies. Layer 1 = Ethernet cable (The signalling aspect) Layer 2 = The computer's NIC ...
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Ping works but not telnet

I want to telnet a target server from a Linux server. I ping the target server but telnet gets a timeout. I try to telnet the target server from my laptop (Windows 10) and it works. Can anyone tell me ...
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After `telnet`ing to a device, can not see the device prompt

I have a virtual router on a server and I have assigned a port no - 20171 to a serial port And I connect to this device using the cmd - telnet 10.X.Y.Z 20171 And after that I see something like this - ...
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macOS telnet connection refused

I use Termius to connect to a gateway, I am able to connect, but the command line is still - I can't write anything there. I am also trying to connect to a gateway using PuTTY, but the error I keep ...
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putty and remina work but telnet and ssh do not

I am connecting from a ubuntu 20.04 to a raspberry pi 4 B also on Ubuntu 20.04 telnet dies immediately ssh can be forced with ssh -T user@host however there is no prompt, the prompt can be restored by ...
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Telnet connect to localhost failed on windows subsystem WSL2 Ubuntu

I'm using Windows Subsystem (WSL2) Ubuntu 20.04, trying to run command telnet localhost 2181, but only got error message saying telnet: Unable to connect to remote host: Connection refused Tried the ...
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BusyBox get rid of debug messages on serial port of Netgear R7000

Firmware version V1.0.11.106_10.2.100 BusyBox v1.7.2 Old telnet enabling tools no longer work because of the latest firmware upgrade to my Netgear R7000 router. I can gain console access through the ...
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431 views

Telnet not working on Windows 10 after installing it

I have a windows 10 laptop (it's pretty old, but I don't think that should be a problem). I followed the instructions and went through control panel and enabled Telnet Client using an admin password. ...
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“Searching for required files” is hanging for Telnet client on Windows 10

On Windows 10, I wanted to enable Telnet, so in "Turn Windows features on or off", I selected "Telnet Client" and clicked OK. It is hanging at "Searching for required files&...
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telnet to the local Sagemcom F@st 5260 router returns “Connection refused”

I have a router "Sagemcom F@st 5260" If I run telnet 192.168.1.1 from any local machine, then I get "telnet: connect to address 192.168.1.1: Connection refused telnet: Unable to connect ...
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How to automatically log onto a telnet server and send a command, using a batch script?

I'm a pretty novice programmer, and I'm trying to send commands to my telnet server by running a single batch file. I've seen this question asked a million times online, and yet none of the answers ...
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Can you edit a file on a remote computer when there is no editor available?

I have an old Synology NAS which which I can only telnet in to and I want to edit a config file. Unfortunately there is no editing software at all; no vi, nano, vim nothing. Is there a way to use ...
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network connection works only once

I have setup a home server and did port forwarding for http/ssh/tcp etc on the router. It was working well until very recently. My problem is that now connections seem to work only once from outside ...
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Telnet “invalid message format”

I started a local Telnet server that listens on port 5555. ~$ telnet localhost 5555 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Hello Invalid message format Telnet was ...
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103 views

Cannot open 8080 port on EC2

I use AWS Ubuntu Instance and try to open port 8080. This is my "Security Groups" settings: ec2 image I have added port 8080 to iptables: sudo iptables -L Chain INPUT (policy ACCEPT) target ...
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Domain for telnet service

I have a domain, I have working telnet service: telnet x.x.x.x 5555 I want to connect it to my domain, i.e. telnet example.com 5555 How can I do this?
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Why does telnet send CRLF when I press enter?

On the telnet provided with my system (Debian), line feeds (\n) seem to be translated to CRLF (\r\n). Specifically, if I run, e.g., netcat -l -p 3334 > file and run echo a | telnet localhost 3334 ...
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TCP RST when connecting via telnet to the application - Windows

I have an application running on Windows. The application listens on port 54000. I can connect to the application from the local machine and it works fine: telnet 127.0.0.1 54000 Now, I am trying to ...
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Cannot connect to MS SQL RDS instance

I can´t Connect to my RDS MSSQL instance. The 'Public accessibility' is set to Yes the subnet goups are using 2 VPC subnets subnet A: CIDR 10.70.2.0/28 subnet B: CIDR 10.70.2.16/28 Both subnets has ...
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How to forward my service from localhost to the internet?

I have made my personal tcp service that works on port 44444 through telnet as a communication protocol. The service itself is just a simple guess game written in C. I am working on Fedora Linux and ...
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381 views

Bypass Linux password login with netcat or ssh or telnet

How can you bypass a password login with nc or ssh? I type 'nc IP-address 13880' and it gives me the login form I need to bypass. Can anyone give me any tips?
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EVE-NG can't open telnet session from ESXi server with ConEmu

I can't seem to open ConEmu with telnet on my Windows laptop from EVE-NG (see picture below). EVE-NG is installed on ESXi on a little server in my LAN that lives in the same subnet. I want to use ...
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Cannot Telnet to a device

I have this Biometric Device and I can ping the device but I can’t telnet to the port that the device does. Here’s I can’t telnet my device. I already turned off the firewall and AntiVirus app with ...
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170 views

Telnet connection failing via port 23 (port is open on the server)

I have a Windows Domain controller and a Windows 10 Work Station set up from my VirtualBox. I am trying to connect to the Work Station on my domain via telnet on my Windows domain controller. It ...
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Can't telnet device on same network from device connected to repeater

Setup I have two wireless APs: A wireless modem router (GW) An AP acting in client mode (WAP-C) - aka repeater Device connected directly to GW (Ethernet): AV receiver (AV) with a web interface ...
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How to pass commands to a telnet window with a batch script?

I'm trying to control a wifi device with a batch script using the telnet command in Windows 7, but I don't know how to pass the commands to the telnet window. This will be a part of a longer script ...
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How does Telnet know where a host is when routing over the internet?

I am fairly new to studying networking, and this is something I have been wondering even though it may be a basic question. I've spoken with people in the networking world and they talk about having ...
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477 views

How to install Telnet from a PowerShell Core prompt

To install Telnet in PowerShell you can run: Install-WindowsFeature -name Telnet-Client This unfortunately does not seem to work in PowerShell Core where it produces the following error: Install-...
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Is this server IP + PORT reachable from my server? (using Telnet)

I am not so into networking and I have the following doubt. I have to test if a specific port on a server it can be reached from another server (or if there is something that is blocking the request ...
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Why Does Telnet Succeed If No Route Back To Host That Initiates It

Machine A could not make a https connection to Machine B. I first used telnet to confirm a tcp connection could be made: telnet MachineB 443 This worked. So, I concluded that the network between ...
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1answer
380 views

PuTTY sending extra characters at the beginning of TELNET connection initialisation

When a TELNET session is initialised using PuTTY, I see that PuTTY is sending the following characters to the server at the beginning of the connection: ..... .....'......... I was able to capture ...
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1answer
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Unable to connect to MySQL VM from host machine

I have an Ubuntu 18.04 Desktop 64 bit host machine. On this host machine, I have used VirtualBox to create an Ubuntu 18.04 Server 64 bit VM, and have installed MySQL on it, created a MySQL user, a ...
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Why is my use of telnet towards a web server providing inconsistent results to others with the same approach?

I'm trying to use port 80 to connect to a website(www.ucf.edu), and send a GET request, but I'm getting inconsistent results to other students using the same exact methods. We had to use SSH to ...
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1answer
53 views

Is it possible to set Telnet communication as higher priority than, e.g. file uploads?

My understanding of the internet is limited. However, I enjoy playing MUDs which are text games that communicate through telnet. I observe that every time an upload is made through our connection - ...
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How to open telnet/ssh to Dlink DSL-225 router?

have D-link DSL 225 router that locate at 192.168.1.1 , with nmap I get PORT STATE SERVICE 21/tcp open ftp 22/tcp open ssh 23/tcp open telnet 80/tcp open http 631/tcp open ipp when I ...
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How to run multiple networked applications concurrently on DOS?

For science, I am working on a Vagrant box for DOS. The virtual machine needs to support a remote command execution service, such as sshd or telnetd, so that administrators can run COMMAND.COM scripts ...
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What are my best option(s) if desiring to tunnel/reverse-proxy to-and-from a telnet server?

I have a quite small VPS abroad, and a BBS telnet server software that i wish to run locally. What are my options, If i wish to only use the VPS as a relay for connections, effectively and ...
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Cannot flash or connect to my Nucleo board (STM32F446) anymore

for some reason I cannot flash my Nucleo (STM32F446) board anymore. It used to work well... I got the following message: openocd -f ./cfg/openocd.cfg -c "program ./build/ch.elf verify reset" -c "...
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Can't connect to certain port - How to unblock port

I am running a Apache2 Webserver with PHP 7 and xdebug. I try to establish a connection between my IDE (Netbeans) and xdebug running on my webserver. I read here that I have to check if I can connect ...
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How to enable Alt Gr or Alt keys on a Telnet Server

I'm running a telnet server KpyM on a Windows Server 2008. My telnet client is a Putty on my Windows 10 computer. I'm running a 16-bit DOS Application through telnet. I need to use the "\" on an ...
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what is the difference between telnet and netcat?

I am looking for an explanation where I can find the difference between telnet and netcat. In which cases should I use telnet and netcat. What a telnet can do that netcat can not do and vice versa. I ...
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4k views

Cancel Server Manager feature installation

I tried to install Telnet Client feature using Server Manager in a Windows Server 2016 and now is completely stuck at running stage. Now I just want to cancel this but there is no option anywhere. ...
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MathWorks is written for Lego firmware V1.03, but Lego is up to V1.10

MathWorks (MATLAB and Simulink) is/are written for Lego firmware 1.03! (with no TelNet ID/passkey) Versions 1.07 and 1.08 also do not require the ID/passkey. Versions 1.09 and 1.10 do require an ID/...
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Telnet validate email, 550 MI:SPF error

When I try validating an email through telnet, using: Telnet MX.server.for.email.i.want.to.validate.com 25 HELO Buddy MAIL FROM: example email address I get a 550 MI:SPF error, telling me that ...
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Enable telnet and telnetd services on Busybox

In order to enable Telnet on Busybox, should be enabled both telnet client and telnetd server services?

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