Questions tagged [telnet]

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

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telnet: connect to address 92.205.28.224: Connection refused

I need telnet 92.205.28.224 587 to not get connection refused I see telnet is an active service and port 587 is active on firewall. I also see 587 is open in the picture below. services: dhcp dhcpv6-...
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Unable to telnet to 127.0.0.1 (local Linux VM) to test SMTP port 25

I have the latest Kali Linux running on Hyper-V as a VM: Sendmail is installed (testing email server) Domain name purchased, say AlphaMoon.org with MX record pointing to my ISP IP address Netstat ...
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How do I enable telnet on a D-Link DIR-878 AC1900 router?

How do I enable telnet on a D-Link DIR-878 AC1900 router? I have tried everything, can someone help me? The firmware version is 1.30 and the hardware version is A1. If anyone wants more details, just ...
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How do I install telnet on windows 10 (Not enable, actually install)

I'm running a modified windows 10, meaning I went though the ISO and removed a bunch of stuff, runs super smooth. Anyway I suspect that telnet is one of the things that I pulled out because now, ...
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Running task in Task Scheduler when do not see the Remote Desktop in WinServer2019 with telnet and cscript

I have two Windows Server 2019 in failover cluster running Redmine. Redmine hangs for a long time when not used, so I made request-Redmine.bat with :: Open a Telnet window ::start /B telnet.bat start /...
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Can't telnet to iOSV router(GNS3) on remote server via vpn by Putty

I am new here, I am trying to telnet to iosv router which is on remote server(GNS3 VM). I have configured openvpn on remote server. I can telnet using powershell, but can't telnet using putty. I have ...
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40 views

Firewall blocked port telnet 23

I have an one firewall table with several entries. Among these one entry is with destination port 23. I don't understand what's the meaning to block destination port 23. After asking my teacher to ...
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34 views

How to send escape character on telnet session while using Powershell 7 with a Portuguese keyboard layout

I've started a telnet session (ex.: telnet ip port) and I'm wondering if anyone knows how to send the escape char so that I can get the telnet> prompt back. I've already found this, but it seems ...
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telnet server on my centos 7 vps login log file

I have installed telnet server on my CentOS 7 VP I want a way to save no login attempts or a log file for all try login telnet from telnet on my VPs
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How to add timestamp to telnet session output from CMD

I'd like to know how to save in a file everything that happens in a telnet session I open from my windows CMD to a device. During this session, I will enter some commands for the device and basically ...
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Is it possible to make Netcat behave exactly like Telnet?

Is it possible to make Netcat behave exactly like Telnet? The "-t" option doesn't seem to quite do it.
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Using ufw to block established telnet connection

I'm trying to learn ufw and I'm wondering if I can block established connections with it. I've made connection between my 2 computers using telnet and I'm trying to use ufw to block it. Tried many ...
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474 views

ZTE F660, /bin/sh: Access Denied

I have a problem with my router ZTE F660, V5.2.10P1T22S (btw same problem with F609). If I do telnet from device which is connected directly to the router (LAN/WiFi) - I get full telnet access. But if ...
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Telnet to Gmail SMTP "starttls auth" syntax error

When I Telnet gmail and send an email using cmd promt, everything works fine. After Telnet smtp.gmail.com 587, following conversation with the server happens: 220 smtp.gmail.com ESMTP m184sm839913wme....
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Why telnet works directly from command prompt but not with open command

When I use following command in command prompt then it works: telnet xxx.xxx.xxx.xxx 443 But if I open telnet client from command prompt and then try following command from withint telnet then it ...
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PuTTY sending extra garbage before each Telnet command

I'm trying to establish a Telnet connection to my 3d printer with PuTTY. It connects, but when I send a command I get echo:unknown command followed by the correct command I tried to send, in the ...
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DAP 1650 - What is the login password for the telnetd server?

I have a D-Link Wireless AC1200 dual band gigabit range extender (DAP-1650) and was trying to get into the telnetd server but I haven't got a password. I tried some of the usual ones: admin, password, ...
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using docker as ssh port forwarder - connection closed by foreignhost

I need to connect to some server which i can connect only from some other server. I' am using ssh port forwarding and i works well when i'am runnig this from desktop, but when i try to do this from ...
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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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477 views

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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192 views

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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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 signaling aspect) Layer 2 = The computer's NIC ...
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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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622 views

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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687 views

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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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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722 views

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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230 views

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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353 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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860 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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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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362 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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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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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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179 views

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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794 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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240 views

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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