VPN - Authentication Timeout

[Jamie T]

Server is SBS 2k fully patched.
Today 2 PDA's and a Laptop are unable to connect to the server over
PPTP VPN (via Vodafone GPRS network). They worked fine last night and
nothing on the server or PDA's has changed. 2 remote PC's (win98 and
winxp) can still access PPTP VPN successfuly (over an ADSL
connection). This makes me think its a problem with Vodafones GPRS
network?

Have trawled various posts concerning this error and tried all the
usual suspects but nothing has resolved it.

Event ID: 20049
"The user connected to port VPN3-127 has been disconnected because the
authentication process did not complete within the required amount of
time."

I enabled tracing and the RASTAPI.log file contains the entries below.
Can anyone deciper them and tell me what might be causing the
problem?

Thanks

08] 22:20:12:507: RasTapicallback: linecallstate=0x2
[3908] 22:20:12:507: DwProcessOfferEvent: hcall=0x100dd
[3908] 22:20:12:507: DwProcessOfferEvent: Accepting call on VPN3-127
hcall = 0x100dd
[3908] 22:20:12:507: DwProcessOfferEvent: CurrentDialInClients=0x1
[3908] 22:20:12:507: DwProcessOfferEvent 0x0
[3620] 22:20:12:507: DeviceWork: VPN3-127. State = 2
[3620] 22:20:12:507: DeviceWork: VPN3-127. lineAccept returned 0x100cc
[3908] 22:20:12:507: LINE_REPLY. param1=0x100cc
[3908] 22:20:12:507: RasTapiCallback: Changing Listen State for
VPN3-127 from 2 -> 3
[3620] 22:20:12:507: DeviceWork: VPN3-127. State = 2
[3620] 22:20:12:523: DeviceWork: VPN3-127. lineAnswer returned 0x100bb
[3908] 22:20:12:523: RasTapicallback: linecallstate=0x100
[3908] 22:20:12:523: DwGetConnectInfo
[3908] 22:20:12:523: DwGetIDInformation
[3908] 22:20:12:523: DwGetIDInformation. 0
[3908] 22:20:12:523: SizeRequired for CallID=16
[3908] 22:20:12:523: DwGetIDInformation
[3908] 22:20:12:523: RasTapiCallback: called id info. not avail
[3908] 22:20:12:523: DwGetIDInformation. 0
[3908] 22:20:12:523: DwGetConnectInfo. 0x0
[3908] 22:20:12:523: RasTapiCallback: DwGetConnectInforeturned 0x0
[3908] 22:20:12:523: RasTapiCallback: Connected on VPN3-127
[3908] 22:20:12:523: RasTapiCallback: Incoming Call
[3908] 22:20:12:523: LINE_REPLY. param1=0x100bb
[3620] 22:20:12:523: DeviceWork: VPN3-127. State = 2
[3620] 22:20:12:523: DeviceWork: Changing State for VPN3-127 from 2 ->
3
[4592] 22:20:12:523: PortConnect: VPN3-127
[4592] 22:20:12:523:
[4592] 22:22:12:570: PortDisconnect: VPN3-127
[4592] 22:22:12:570: InitiatePortDisconnection: VPN3-127
[4592] 22:22:12:570: IntiatePortDisconnection: WAN Miniport (PPTP),
CurrenDialedInClients=0x0
[4592] 22:22:12:570: InitiatePortDisconnection: Changing state for
VPN3-127 from 3 -> 5
[4592] 22:22:12:570:
[4592] 22:22:12:570:
[3908] 22:22:13:570: RasTapicallback: linecallstate=0x4000
[3908] 22:22:13:570: RasTapiCallback: LINECALLSTATE - initiating Port
Disconnect
[3908] 22:22:13:570: InitiatePortDisconnection: VPN3-127
[3908] 22:22:13:570: InitiatePortDisconnection: Changing state for
VPN3-127 from 5 -> 5
[3908] 22:22:13:570:
[3908] 22:22:13:570: RasTapicallback: linecallstate=0x1
[3908] 22:22:13:570: LINE_REPLY. param1=0x100aa
[3908] 22:22:13:570: LINE_REPLY. param1=0x10099
[3908] 22:22:13:570: RasTapiCallback: Idle Received for port VPN3-127
[3908] 22:22:13:570: RasTapiCallback: changing state of VPN3-127. 5 ->
1
[3908] 22:22:13:570: RasTapiCallback: lineDeallocateCall for
VPN3-127,hcall = 0x100dd
[3620] 22:22:13:570: PortTestSignalState: DeviceState = 0
[4592] 22:22:13:570: DeviceListen: VPN3-127. State = 1
[4592] 22:22:13:570: DeviceListen: Changing State for VPN3-127 from 1
-> 2
[4592] 22:22:13:570: DeviceListen: Changing Listen State for VPN3-127
from 4 -> 2
[4592] 22:22:13:570:

 

[Jamie T]

Result. After a week, Vodafone finally got their engineers to look at
it and discovered something wrong with the VPN protocols on their
routers. Couldnt tell me exactly what the problem was though. Fix
now in place and all working fine - after I spent the best part of
last week trying to fix it. Grrrrrrr!