Destination Host Unreachable
Posted on 2013-06-30
We have a network of about 30 computers.
We have a Server with 3 Virtual Servers. We have a Linksys VPN concentrator,
I do not know if it is a coincidence or not, but following a Windows Update on the Server - This update was performed remotely connecting through our VPN I lost connection and went to the office. The Server was finishing the update and rebooted and everything came up fine on the Server.
However, NO computer on the network can access the Internet and pinging any computer on the network receives a Destination Host Unreachable error from 192.168.1.125 (That is the Gateway address which is the VPN Concentrator).
I can connect remotely to the VPN, but cannot connect to the Server and receive the same error.
No Internet access and none of the computers can ping the server. The Server cannot ping anything but itself (the 3 virtual servers). Nobody can access the Server or the Internet.
I don't see how the Server could be the problem because none of the 30 computers can access the Internet either including the Server.
192.168.1.125 is the gateway address on the VPN Concentrator. Could this be a BAD VPN Concentrator? None of the computers can access the Internet and I don't see how that involves the Server. Again, none of the computers can ping each other - The entire network appears to be broken.
We have 3 network switches that all of the workstations are connected to and the switches are all blinking on and off continuously like collisions are occurring.
Let me also say the Windows Update was occurring remotely on Flash1 which is the Primary Server which contains the 3 Virtual Servers Flash2, 3 and 4. The Domain Controller is Flash2 where the Active Directory is located and DNS. I got disconnected from the network and when I tried to reconnect I connected to the VPN itself, but could not access any of the local servers ( so I went to the office where I discovered that I could no longer access the Internet from the Server or any of the workstations and none of the computers can ping the Server or any other computer on the network.
I have never seen anything like this.
The Primary Server and 3 Virtual Servers via Hyper-V appear to be fine - can ping each other, but nothing else and none of the workstation computers can ping the Servers and the Servers cannot ping anything but itself.
After connecting remotely via the VPN the error :Reply from 192.168.1.125 is OK, but pinging any of the Servers 192.168.1.17, 19, 21 returns Reply from 192.168.1.125 Destination Host Unreachable occurs when trying to ping. They can only be pinged when sitting in front of the Server itself.