n1mm telnet not connecting to anything!

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  • Updated 2 weeks ago
I have been using N1MM for years with no problem but recently I noticed that I wasn't getting any DX spots. I checked the telnet window and it wasn't connecting to the cluster I've been using for some time. So I tried another, and another, and then a WHOLE BUNCH! Including  VE7CC and K3WW. Nothing. No connections. I googled for answers and tried turning off the windows firewalls (Win 7) and opened port forwarding 23 and 7300 on my router. Still nothing. Telnet from the cmd prompt does not work either. 
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Dave KD5FX

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Posted 2 weeks ago

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Michael Walker, Official Rep

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Dave

A few things you can try.

Port forwarding should not be required as those are for inbound packets.  You are doing outbound.

First, let's see if Telnet actually works, so if you haven't download Putty and see if that works.  This will show if it is an N1MM issue or not.  https://www.putty.org/

Configure it like this and hit Open



This is my cluster.  If you see a login: prompt, then you have an N1MM issue you need to solve.

If not, then you have a PC issue you need to solved.  This is likely a firewall issue and you want to make sure you Network card didn't get marked as Public due to some Windows update.

Let us know how you make out.

BTW, for those connecting to my cluster, I have filters running and only show spots that are from stations that spot them in the NE US and Canada.   

Mike va3mw
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K1DBO

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Virus scanner?  Some will block outgoing connections to "unusual" ports.
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Dave KD5FX

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No, nothing running but plain ole MS Security Essentials. It WAS working just fine until a couple of weeks ago.
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K1DBO

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Based on your comment regarding the puTTY session you tried, we already know it's not just N1MM that's having trouble.  This would suggest some sort of filewall issue somewhere.  Did you make any changes on your router before the trouble started?  
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Dave KD5FX

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No, no changes. I even turned off the firewall. Still doesn't work.
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John

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Do you use a wifi connection or hard wire connection. If wifi, then you may have to check that. If hardwired, then perhaps a broken wire ?

73
John
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Andrew O'Brien

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VE7CC worked for me over the weekend.
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Michael Walker, Official Rep

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Dave, I assume that you can actually connect to the internet with this computer with a browser ?

Can you open a cmd prompt and do a:

Ping 8.8.8.8 and paste in the results.

Next, on the command prompt do an:

ipconfig /all

And paste in those results too.
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Dave KD5FX

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It's hardwired, network and internet is working just fine. No other problem, just telnet. 

Windows IP Configuration

   Host Name . . . . . . . . . . . . : BigDog2
   Primary Dns Suffix  . . . . . . . : 
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connection
   Physical Address. . . . . . . . . : 18-03-73-B4-BB-74
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::7d03:3af3:854c:34f7%11(Preferred) 
   IPv4 Address. . . . . . . . . . . : 192.168.0.27(Preferred) 
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Monday, February 12, 2018 7:19:05 AM
   Lease Expires . . . . . . . . . . : Monday, February 12, 2018 8:19:05 AM
   Default Gateway . . . . . . . . . : 192.168.0.1
   DHCP Server . . . . . . . . . . . : 192.168.0.1
   DHCPv6 IAID . . . . . . . . . . . : 236454771
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-21-1E-FF-D7-18-03-73-B4-BB-74
   DNS Servers . . . . . . . . . . . : 2602:306:bd95:fb00::1
                                       24.116.0.53
                                       24.116.2.50
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{5486E567-5249-4CF4-957A-DCD24D3503B6}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:5cf2:8c44:28dc:3e90:3f57:ffe4(Preferred) 
   Link-local IPv6 Address . . . . . : fe80::28dc:3e90:3f57:ffe4%13(Preferred) 
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled
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Michael Walker, Official Rep

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I have seen this once before where the firewall was off, browsing worked, but nothing else did. 

It can be one of the following.

Windows networking
Windows firewall
Router firewall

For the router firewall, do you have another computer that you can test with to see if Putty works on the firewall?  If it fails, then you have a Router Firewall issue.

For Windows, you might want to give this a try.  https://support.microsoft.com/en-us/help/299357/how-to-reset-tcp-ip-by-using-the-netshell-utility

Also, did you do something that might have increased your Browser Security?  It will have an affect on your overall Network.

Mike
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Dave KD5FX

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Michael,
Thanks for your help! I am able to putty to va3mw cluster just fine on my laptop which is on the same network. (Wireless on laptop, wired on the problem PC). 
That should eliminate a problem with the Router firewall. I ran the netshell utility from your link above (twice), rebooted, no joy. I also turned off windows firewall from the control panel. Still nothing.
Interesting, I just discovered that I can't PING any website either from a CMD prompt. I can ping other devices on my local network but nothing outside on the internet. I googled this problem and found several 'solutions', flushing the DNS, this and that. Tried them all, still the same problem. I can't ping or telnet anything. But I can browse with Chrome to any website. I checked my DNS settings, it's set to use the default in my cable modem. I checked those, looks like the standard ones. I tried setting them to 8.8.8.8 & 8.8.4.4 which I've used before but that didn't help. Can't even ping the cableone DNS servers. 
What else can I try?
(Edited)
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John

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I wonder if you have been hacked by any chance ? or someone straddling your IP address ?
(Edited)
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Dave KD5FX

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Everything works OK on two other PCs in the house. I don't think it's the cable company or the modem. Something is messed up in the PC I use to access my Flex.