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telnet problems: part deux

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8 replies

by myz420

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I had this problem not to long ago and a simple winsock fix for xp worked, but not this time. I am on a domain with a t1 line and my office has a switch with 4 ports. The other 3 machines in the office connect to telnet just fine, but the 1 rebel machine wont. It connects to webpages and messengers just fine, but no telnet. I've ran numerous spyware and virus scans, reinstalled tcp/ip, winsock fix, and reconfigered the ports in my firewall. Any suggestions?

8 replies

by myz420

What would scanning for ports do? There is no firewall on the pc, and the firewall in the domain is already configured correctly. I just reinstalled windows and that did not help my problem.

by zen37

Let's start from the bottom.
Layer one: The machine is connected (of course it is)
Layer two: You have a valid link with the switch.
Layer three: Your IP addresse for that workstation is static or DHCP? Is all the information correct when you do an "ipconfig"
Can you ping the device you are attempting to telnet to?
Layer four: Can you telnet to other devices? If you do a telnet and while you wait you do a netstat -an in a DOS window, do you see you machine attempting a connection with the device on port 23? You are using port 23 on your other devices, right? Are you attempting to telnet to an IP or a name device? If you are attempting to a name, make sure it resolves correctly.

Can you give us the error message you are getting?
Does your device have a limited amount of telnet sessions it allows? Does it have IP restrictions on who can telnet to it?

If none of these can help, let us know and we will see what we can do. ;-)

by myz420

The machine is connected and has a valid link. I am on a domain so we're running static ip's and the information is correct when ipconfig is ran. No I cannot ping anything threw telnet, but i can ping other machines on the network threw cmd, including my unix server. FTP's arent possible either. I have been trying to connect to a game server, and when i found out that it wasn't working I tried to telnet to other things and got nothing. The machine right next to mine on the switch is also running xp sp1 and has no problems with FTP or Telnet. The error message i get is the simple "Cannot connect.." error. No ip restrictions and unlimited telnet sessions aloud. **UPDATE: telnet and ftp work fine on a DHCP network, but still get nothing on dns static ip.**

by zen37

Ok

If understand you correctly, you are attempting to telnet to your Unix server that you can ping within a CMD window. That's good. Your problem is definatly at layer 4 or up. It's not your server because other workstations are able to telnet to your server, so the problem is very probably on your workstation.

Can you give me the IP address, subnetmask, default gateway of you station that does not work, one of the station that works and the Unix server.

Now, your switch, is it a Layer 2 switch or Layer 3 switch. The difference is (in case you don't know) that the layer 2 will be able to talk to all other devices no matter what while the Layer 3 will require configuration to do that, especially if they are on different vlans.

I don't really follow you when you say that it works with DHCP but not static, can you elaborate on that?

Let me know.

by myz420

_Problem machin_
ip: 10.3.216.237
mas: 255.255.254.0
gateway: 10.3.216.199

_working machine_
ip: 10.3.216.243
mas: 255.255.254.0
gateway: 10.3.216.199

we have from 10.3.216.200 up to 10.3.216.255 free'd for workstations on our server. We have a layer 2 type switch. When i take the pc home and plug it into my DSL network(which obtains ip's, subnets, gateway automatically), everything is fine and connects fine. When i bring it to my office where we have static ip's set, it does not.

by zen37

Hummm..

When you connect from your home DSL, you go through a firewall to get to your Unix server. Do you go through your firewall from the inside aswell?

You forgot to write the IP/mask/DG of your Unix server. Are your workstations and your server on the same segment?

by myz420

Nope, no other firewall except for the main one threw my ISP.

Server:
10.3.216.2
255.255.254.0
10.3.216.199

Yep, same segmant. Ive stumped my ISP's IT department with this problem.

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