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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 to Yandex's smtp port wont work on Google Cloud Plaltform

I'm trying to send mail on my server which on located on vps in Google Cloud. I can telnet to gmail's SMTP both 587/465 but i can't connect via telnet to Yandex. It's stucking on Trying .... # telnet mail.yandex.ru 587 Trying 213.180.193.125... I…
ahmetertem
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Random domain when using telnet on my server's IP

I was preparing a new website on my cloud server and before changing the domain's pointing IP I decided to use telnet to make a quick test. Since each site is a vhost I can use a different domain (which points to the same server) and I get a result…
winck
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Third party trying to test LDAP(s) port on our server

So we've been trying to set up an LDAP sync with an outside vendor. We have a Cisco ASA, which I'm fairly confident is configured correctly as far as NAT/PAT goes. I also opened the ports on the server itself. So here is my question, which may be…
Dan Desroche
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POP3 service is not ready even though the service is running, Telnet does not return POP3 OK status?

I am working on a Windows 2008 R2 server running Exchange 2010 and I am currently trying to troubleshoot a POP3 connectivity issue that is preventing some outside remote accounts from logging into the mail server. The certificates are valid and I…
brndng
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remote host can't send mail using sendmail in ubuntu

I have followed the below steps to configure sendmail apt-get install sendmail add the below content in /etc/mail/auth/client-info AuthInfo: "U:" "I:" "P:" sudo bash -c "cd /etc/mail/auth/ &&…
Bilal Usean
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SSH & Telnet work, then don't

I have a very tiny network in one room, with one Fedora laptop connected to a Dell PowerEdge server with CentOS. They communicate through an unmanaged wired Ethernet switch, which itself is connected to an AC1750 router that acts as a bridge to the…
SomeDude
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Postfix/Amavis 451 4.3.0 : Temporary lookup failure

I am trying to set up a postfix server to prevent spam/malware. The server should reject incoming mail, that is suspicious, otherwise send it on to the actual mailservers which are listed in transport_maps. When i try to test my setup with telnet…
unlulau
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Windows Server 2012 Telnet connection lost port 25

I am new to Windows servers, I have Windows Server 2012 and I am trying to set up and enable mail server (SMTP). I have followed this tutorial to instal and enable SMTP server and completed it successfully. Now I would like to test my server, I…
K.I
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More Management VLANS for a switch

I created a management interface in vlan 99 to telnet the switch (2900 series). I also wanted to configure another management interface for the same switch from the computer belongs to the different vlan 101. I can configure and bring the line state…
Vishal S
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Telnet windows 2008 vs 2003

I have a mail server using powermta on a windows 2003 server (legacy). If I telnet into that server to test smtp connectivity, it works from other 2003 servers and from my dev machine running windows 10. I can issue the ehlo commands/etc. They…
lucuma
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Mailslurper connection timeout after 6 seconds

I'm trying to setup mailslurper for email testing but I keep getting a connection timeout after 6 seconds whether using telnet or netcat. I have left the config as default and mailserver creates the database on startup. connecting with telnet $…
markhorrocks
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Mail subdomain not connecting to Windows Server Virtual SMTP via Telnet Client

I trying to set up subdomain (e.g mail.mydomain.com) for use with a virtual SMTP server running on windows server 2012 SP2. I’ve tried to telnet with the command ‘telnet mail.mydomain.com 25’ but it doesn’t connect. In the properties window of the…
Hevski
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xinetd service is up but not listening on port 23

I am trying to open a telnet connection from a Wheezy VM to a router in GNS3 but even though the ping is successful, I am unable to open a telnet connection from the VM to any of the routers. the connectivity is as such : VM > hub > router1 Note…
surya
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Can't connect to python server on LAN

So I have this python server which just returns the uppercase sentence which came as a input: from socket import * serverPort = 12000 serverSocket = socket(AF_INET, SOCK_DGRAM) serverSocket.bind(('192.168.1.2', serverPort)) print "The server is…
Jarwin
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Is it possible to reset password of Switch CISCO 3500?

With telnet, is it possible to reset password of a CISCO's switch or you have to connect to the console port? Thanks for response..
bAN
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