Questions tagged [telnet]

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

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Local Login - what is the real meaning in TELNET?

I am studying about TELNET in Computer Networks Course and having an exam tomorrow. When starting it, I saw a difference between Local Login and Remote Login. In one book, When a user logs into a ...
Sabhi Sharma's user avatar
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How do I SSH into this home router? Minimal web options, SSH connection reset by peer, telnet creates bad request

I'm looking to extract logs from my TP-Link Archer AX73 to do some basic network monitoring. I initially followed a guide involving an SNMP exporter but quickly discovered that there is no option to ...
followmeimlost's user avatar
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PLink telnet from Excel VBA - avoid login delay, or maintain session for multiple queries

I have a Linux box which I'm testing, and I have an Excel workbook with tables of tests I'm running. (Don't get tied up on Linux, it's just a Telnet target for the purposes of this question.) The ...
Scott's user avatar
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Ser2net returns double lines in terminal. What to do?

I'm pretty new to Linux, but I decided to build my own console server to connect to my Cisco devices. I have a Raspberry Pi 4 on which I did install ser2net and it works just fine. But when I enter ...
Tjaa's user avatar
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Can't login to the router once the connection is established using telnet

I'm trying to login to the router using telnet. Connection is successfully established and I'm asked for the login but nothing happens afterwards. I enter the username and it seems like it just looped ...
MrKTheGreat's user avatar
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How to add a pause between lines in a multi-line paste into Telnet terminal on Bash?

I am using the telnet command on a Bash terminal in Linux to connect to a Console of a firmware running on an embedded system. The FW is controlled via console commands. To make things easier, I ...
ysap's user avatar
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How SSH port forwarding over the internet [closed]

I want to access my remote devices SSH server Attached My remote PC (mostly a router or Raspberry Pi No internet to devices) over the internet (my PC has Internet) using my laptop. Anydesk TCP ...
Shannon's user avatar
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Create Telnet connections to multiple servers and log the welcome messages

I need to remotely determine what FileZilla Server version is installed on a large number of computers . I know that if I initialise a Telnet connection to a FZ server, I will get a response that ...
Oddthetall's user avatar
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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 <my ip>, it pings. ...
daubs-05colobus's user avatar
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How to print all lines of responses of command in telnet?

Perhaps this is trivial but Google searching doesn't find anything useful at all. I am using Windows 10, and I use telnet.exe to control my modem. Sometimes the responses of the commands entered is ...
Ξένη Γήινος's user avatar
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wc3270 not changing screen mode

I work with a process in an IBM i system that implies a change in the screen mode. When I login, I entered 24x80 mode, and after a couple of screens, I get to a listing that is 27x132 mode. In the IBM ...
agreppi's user avatar
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1 answer
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How does telnet give me access to applications behind a firewall?

In a work project I'm working on, I'm required to do telnet <ip address> <port> before running my application to make sure we can reach connected services. I cannot connect to those other ...
IceTea's user avatar
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How to force `telnet` (in TCP mode) to send bytes immediately?

In Linux, when I run telnet <address> <port> and then type things, it buffers data and only sends collected line when I hit Enter. Furthermore, it buffers up to 4096 characters and ...
Nikita Kipriyanov's user avatar
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What is this character?

I'm running an Ubuntu machine and RDP'ing into a Windows 10 server. There's a .txt file on the server which when opened in Windows' text editor looks like this: when I open a terminal and typethe ...
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tcptraceroute is working but telnet got timeout

I'm trying to telnet public server using specific interface. # telnet -b 10.144.238.192 google.com 80 Trying 142.251.42.14... telnet: Unable to connect to remote host: Connection timed out If I test ...
manus's user avatar
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Postfix not sending emails outside

so I'm trying to run a postfix app on my raspberry pi 4 following this tutorial: https://raspberrytips.com/mail-server-raspberry-pi/ But when I try to use telnet to send an email to an external mail, ...
Tigron 's user avatar
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how do I issue Stop + A command via a putty telnet session for a solaris unix sparcstation (Solaris OS version 4.0)

I am struggling to issue a Stop + A command sequence on a Solaris Sun OS Sparcstation remotely. The ultimate goal is to be able to reboot the host machine without using shutdown or reboot commands. ...
user1758307's user avatar
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Ping Works But Telnet Connection Fails - VPN

My laptop is connected to VPN and this VPN created a new adapted with new IPv4 assigned. I'm accessing a specific server through VPN and I want to run an application on my laptop and I need it to be ...
Mostafa Awad 's user avatar
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Link/protocol handler for telnet on Windows 11

The following configuration to open a telnet:// address does not work on Windows 11 . It was working on Windows 10 though HKLM\SOFTWARE\Classes\telnet\shell\open\command
user20285132's user avatar
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How to issue persistent commands on D-Link routers with factory firmware?

I recently bought a D-Link DIR-822 router and I can telnet into it and issue Linux commands. The thing is, say I issued random commands like; iptables -P FORWARD DROP iptables -I INPUT -p tcp --sport ...
randomuser's user avatar
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Telnet to public IP times out but doesn't when LAN address used

I have a new email server and and old email server on my network. I can send email to the new email server (let's call it mail.newmailserver.com) from Gmail and reply successfully (e.g. to/from works)....
nekton's user avatar
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Can't telnet 9100 on 2 windows servers on same network

I have 2 servers A and B on same subnet. Both can't telnet each other on 9100 Connecting To (Server IP) ...Could not open connection to the host, on port 9100: Connect failed Both are 2012 R2 Both ...
Recon's user avatar
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How to relay a local IP/Port, normally accessed through PuTTY using Telnet connection, to remote PC?

Normally I have access to a local Telnet device (static IP/Port), connected via LAN/ethernet to my Windows PC. I use PuTTY to setup a Telnet terminal and send/receive and go on with the job. Currently ...
Felix's user avatar
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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 ...
Doug's user avatar
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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 ...
i_Blaze's user avatar
1 vote
2 answers
2k views

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, ...
Dragon Epep's user avatar
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1 answer
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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 ...
S. M.'s user avatar
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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 ...
Luis Abreu's user avatar
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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 ...
Kankarollo's user avatar
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1 answer
4k 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 ...
HE9CbITb's user avatar
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832 views

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....
AJ HUNTER's user avatar
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514 views

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 ...
Frank Martin's user avatar
2 votes
0 answers
541 views

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 ...
drunkScientist's user avatar
-1 votes
1 answer
257 views

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, ...
pee2pee's user avatar
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1 answer
883 views

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 ...
xyx's user avatar
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2 votes
1 answer
3k 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 ...
HE9CbITb's user avatar
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1 answer
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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 ...
user1424739's user avatar
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0 answers
303 views

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; ...
PHP Guru's user avatar
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-1 votes
1 answer
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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 ...
Dougie's user avatar
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1 vote
1 answer
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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 - ...
Darshan L's user avatar
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2k 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 ...
Lilya's user avatar
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0 answers
194 views

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 ...
marc's user avatar
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6 votes
0 answers
2k 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 ...
Cherry Wu's user avatar
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1 vote
3 answers
7k 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. ...
Alan Abraham's user avatar
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1 answer
2k 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 ...
govordovsky's user avatar
0 votes
1 answer
625 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 ...
cosmarchy's user avatar
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0 votes
1 answer
96 views

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 ...
danny's user avatar
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0 answers
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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 ...
rapt's user avatar
  • 101
0 votes
1 answer
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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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