Connection refused telnet: Unable to connect to remote host What am I doing wrong? How do I have a session like the one shown in the picture? SexyBeast SexyBeast 1 9. Are you sure your mail server is running on port 25? That might be the problem. Also, you can use localhost instead if you want to connect to your own computer.
networking - Mac OS X can't ping/telnet localhost - Super User
That failed as well. See edit. I don't have any mail server running per se. I just fired up my terminal and ran these commands.. Well if you don't have a mail server running on your own machine then how do you expect to connect to it? I'm confused as to what you're trying to do. How do I configure my Mac to run as a mail server?
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I thought that was what the book is going to teach me! I have no idea how Telnet works or what it does, this example was given in the very first chapter itself, so I figured I will try it.. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free. Hi all I'm trying to set up a mail server, and all the guides say to check by connecting to the mail port using telnet.
However, telnet throws back the following: Yep, but trying both with and without the port still returns the same message. Either because the mailserver isn't running or because it's not configured to listen on the ip What does netstat -tna say?
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You will have to open port 25 if it isn't already. Try a nmap scan of localhost to see which ports you have open. Find More Posts by bulliver View Blog. Last edited by neocookie; at I'm not so worried about the MTA, its the localhost connection for telnet. I've never come across this before. Oops, didn't notice that!
While trying to set up the MTA, I tried to "telnet localhost 25", and got the above message. I thought it was the MTA, but as I found, its up and running.
Telnet: Unable to Connect to Remote Host: Connection Refused
So, I tried to do a simple "telnet localhost" to see what was going on, and got refused again. Thats what I'm trying to sort out - why telnet is misbehaving. Any ideas why this could be? Has me stumped! I'm such an idiot at times. Note that tcpdump uses a. If the port is blocked by a firewall and the firewall has been configured to respond with icmp-port-unreachable this will also cause a connection refused message.
Again you can see this with tcpdump or similar. ICMP So now you know what's causing the Connection refused message you should take appropriate action e. For me on Debian 6 squeeze it was as simple as checking the SSH service:.
And finding nothing existed with the message ssh: My Centos Shorewall firewall had run out of disk space. Others like cnn. Clearing some space and restarting the server fixed the issue for me. Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.
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Home Questions Tags Users Unanswered. What causes the 'Connection Refused' message? Ask Question. HBruijn Iain Iain k 13