Why can't I connect to port 23 (telnet)?

Question

I'm having trouble connecting port 23. I run the tests on cmd and it says "Could not open connection to the host, on port 23: Connection failed". I need to open it to be able to use the Program ventrilo.

I have closed every firewall and anti virus. So I'm sure its not because of that.
I try to open it using my router but not too sure how to do it. Every website I've checked gives a different version so please do not link any websites to me.

I tried to open the ports but without success. Mainly because I think I'm doing it wrong. I don't know how to fill in each detail. Which is the public port? Which is the private port? Computer and application names. All baffles me. I really just want to get Ventrilo running once and for all.

I have Microsoft Vista.
My router is Dlink 615.

Help me out but please do not give links out especially from the website portforward. The Dlink 615 Manual they have is not exactly the same as mine with a few differences. Also, most of my problems are where to fill in what detail exactly. Where do I put in 23 (for port 23) and 4662 (the ventrilo port)?

Answer 1

For port 23 to work, what application is listening on that port??? Do you have a Linux server that will respond to telnet? Windows, by default, will not....



Your public port is:

http://www.whatismyip.com/tools/ip-whois-lookup.asp

and in the router, that public port is irrelevant, all you need to do is port forward the ports to your PC running those services (like Vent). Your PC should be at a static LAN IP address, not using DHCP, nor should it's address be in the DHCP pool range, else you may get conflicts.



It's not rocket science. Incoming requests from the internet go to your router, the router sees what port is being requested, then forwards that packet to the PC's IP address defined in the port forwarding section of the router configuration. The application listening on that PC, for that port, gets the packet. That's all there is to it, nothing else....

Answer 2

Port 23

Answer 3

Every internet protocol (method of talking) has 2 parts. A client program and a server program.



The client talks TO a server and makes requests, the server serves (or services) those requests. Most peoples home computers are set up with many client programs and no server programs. (which is good, for security reasons)



Examples of client programs are Explorer or Foxbase or Netscape as browsers, Outlook or Thunderbird as mail client programs, FTP or SFTP as file transfer client programs.



Having Outlook on two machines is not enough to allow sending email between those machines. Both of them are using clients (requesters) without a server. The same seems to be happening to you. You are running a telnet client program to talk to a machine that does not have a telnet server program listening on port 23 to receive the request for connection. Its basically a closed door and what you want is an open door with a doorman standing there.



Im afraid that I dont know what options are available to Vista as far as a telnet server. I use Linux for server things and Windows for client things. But if you google vista, telnet, server, software then you should get something. The telnet server program that I use is called telnetd

Answer 4

This Site Might Help You.



RE:

Why can't I connect to port 23 (telnet)?

I'm having trouble connecting port 23. I run the tests on cmd and it says "Could not open connection to the host, on port 23: Connection failed". I need to open it to be able to use the Program ventrilo.



I have closed every firewall and anti virus. So I'm sure its not because...

Answer 5

What kind of machine are you trying to connect TO ??



Specifically, if you're trying to connect to your Vista machine from some other machine, there might not even be a telnet service available.



Bottom line, the place where you're running telnet (the client) is probably OK (maybe not, but probably). Where you need to troubleshoot is the place you want to telnet into (the server). That's where you need a running telnet service, open firewall, selinux (as applicable) configured properly, etc. etc. etc.

Answer 6

HAH!!!!!!!!!!!!!!!!!!!!



You are on Vista or Win 7 and they don't have Telnet installed!!!!!



Google for instructions to install it!!!!



Learned that day 2 at an ISP Help Desk



Good luck Bud



AAS Computer Networking

Answer 7

that is a typical response when there is no response from the remote device or the connection is delcined. is there a device ready and open to requests on port 23?