Windows 8 - Telnet issue on VPN

[DextrousDave]

Good Day

I have 2 PC on my LAN - Windows 7 Pro and a Windows 8 Pro. Now the both of them are on the same network as well as on the same VPN network. Both are successfully connected to the VPN network.

The issue is:
TELNET:
When telnetting from the windows 7 PC to all available addresses on the VPN, it connects. However, with the windows 8 PC, it does not connect at all.

What could the problem be? My telnet client on the Windows 8 PC is enabled...I also disabled all firewalls and antivirus on the Windows 8 machine...no luck

Any help?

 

[ThinkCentre]

It might be your firewall.

 

[Nuro]

Start with the basics:

1. If ICMP is allowed, can you ping the server?
2. Does your routing table look ok?
3. What VPN client? Most don't allow concurrent connections, unless enabled by the VPN admin.

 

[DextrousDave]

It might be your firewall.

Thank you ThinkCentre - I disabled all firewalls and anti-malware software...So it cannot be that

 

[DextrousDave]

Thank you Nuro. - See my response in your quote

Start with the basics:

1. If ICMP is allowed, can you ping the server? - No I cannot ping the server I want to telnet to. If I could ping to it, but not telnet, what would that imply? Port blocked? Something wrong with telnet client on windows 8 machine?
2. Does your routing table look ok? - How do i check for that?
3. What VPN client? Most don't allow concurrent connections, unless enabled by the VPN admin. - Well, on both the windows 7 and 8 machine, I am connected to the VPN. Also, the VPN admin will allow concurrent connections since it is required by our clients...

 

[Nuro]

Use

route print

from command line to see your routing table. You should see certain subnets routed to your vpn interface. You can compare against your Win 7 machine. Depending on your vpn configuration, your default gateway (0.0.0.0) might even be routed to your vpn interface.

If routes are missing, it might be a permissions issue when running the client. You might try running the client as admin. If your routes are there, it might simply be a compatibility issue. What client is it?

 

[Rocket-Boy]

My windows 8 machine is fine for telnet across the vpn. Maybe test by downloading putty or something similar to see if its something to do with the windows telnet client.

 

[DextrousDave]

@Nuro - Thank you.

I will run the tests and will come back to you on the routing table.

I am using a CISCO VPN Client - vpnclient-winx64-msi-5.0.07.0440-k9.exe.

 

[DextrousDave]

@Rocket-Boy.

Thank you. Will try putty and see what happens

 

[InvisibleJim]

My telnet client on the Windows 8 PC is enabled...

Do you have Telnet Server enabled on the Windows 8 or just the client program? It is disabled by default.

 

[DextrousDave]

@InvisibleJim - No only Telnet Client enabled...

 

[eCliPSe]

download and try putty just to be sure it isn't a client issue.

 

[staunchy20]

telnet client only allows you to telnet from a machine. the machine you want to connect to via telnet must have telnet server enabled

 

[Burzum]

telnet client only allows you to telnet from a machine. the machine you want to connect to via telnet must have telnet server enabled

The op stated that the Windows 7 machine connects, so I assume Windows 8 has a setting issue.

To the op: Please post the output on connect in Windows 8 from the shell.

 

[DextrousDave]

Hi All.

Sorry for the late update.

The issue is not with telnet but rather the VPN I wass connected to, it did not allow any connections out...

I just downloaded a different version of the VPN client (Cisco) and the telnet worked again...