I have a Windows Server 2012 Std Edition on a IBM 3550 M2 to a Lab at work. Every couple of days when users try to connect using PPTP to server, the connection hangs on completing connection. at the SAME time the System loses the ability to ping the Server.
This happens with both Windows 7 & 8. I have setup a ping to the server from the workstation to the server ping 172.16.21.203 -t and when the VPN tries to connect the ping times out when @ the same time that connection begins to complete the
connection. All communication to the server hangs from the workstation perspective.
The Ping from the server to the workstation may drop a ping but keeps on working. A ping to the gateway from the server never fails.
The work station can be remote on a separate subnet or from a Home network and the failure symptom is the same. Of course from Home we have a VPN to the intranet as well as a subnet on the home router. The lad Domain controller's and DHCP servers IP is 10.11.1.1/240 Second Nic on the VPN Server.
Example Simple failure
Workstation 172.16.5.200/24 192.16.5.1 <->RRAS Server 172.168.20.203/25 172.16.20.129.
Home to intranet to Lab.
Laptop(192.168.15.23/24 192.168.15.1 <-> ATT Client VPN 172.16.100.200/24 192.16.100.1 <->RRAS Server 172.168.20.203/25 172.16.20.129.
At the time of the Failure Both types of connections fail and Remote Session to the Server quits.
On the Home connection the Ping fails to an ARP and it uses the default IP 192.168.15.23 as the source, not the VPN IP which is in the ARP table.The inconsequential error on server is that the remote client does not support the authentication protocol needed. before the failure the same configuration works fine. I get my static route pushed down just fine.
I If I either kill the request to connect to the VPN Ping starts to work normally. and I can remote into the rras server.
The only workaround that I found through much PD and frustration: Restart rras Service on the server and it works until is quits again.It seemed to happen more often on a Broadcom 5709 Nic, so I moved it to a Intel Pro 1000 Nic and the failure still occurs. .
All Nic Drivers are current.
The failure occurs on Windows 7 or 8 at the same time. The route to from the Server to the Nic does not fail, though the opposite logical path fails.
Please advise......