#1 IP Overlap
The IP overlap issue happens because our internal network uses 192.168.X.X IPs and when users are on travel, they sometime log on to high speed internet access at hotels where the IP they receive is the same. So the VPN connects but the traffic doesn't go through to our internal network. If we change the IP they received from the hotel to 10.10.X.X then they can access the internal network. All machines are windows XP.
#2
Problem number two is that for some home users that use sympatico DSL, the connection works every time but 50% of the time the DNS resolution doesn't work. We believe that for some unknown reason, it's trying to use NetBIOS instead of DNS. I can ping the IP but not the server name. Windows gives them a 169.x.x.x address and we believe that it might also give them the wrong node type. I don't know much about how this work however once we give users a static IP 10.10.x.x to the ethernet adapter and turn off lmhost lookup and turn off NETBIOS then it works all the time however if we enable Netbios or lmhost lookup or both then it works sometime and doesn't work other times. To recreate the problem I simply need to reboot many times and I get different results with the same settings. We started using lmhost file so that when we have DNS resolution problems, they can still connect to our exchange server however this should not be required. We need to determine why it is that sometimes XP does not use DNS to resolve the name. We've made some changes to the VPN setup and we've seen progress with the DNS resolution however it's still not working all the time. Sometimes we can tdo nslookup but we can't resolve the name. Other times we have to use the fully qualified name.
#3
Out third problem is that we get many blue screens and we suspect it's the VPN client.
This is from one user
Error:
DRIVER_IRQL_NOT_LESS_OR_EQUAL
Stop: 0x000000D1 (0x8240B35E, 0x00000002, 0xF429B626)
CVPNDRV.SYS Address F429B626 base at F4286000 Date stamp 3d515775
or from another machine
This machine is brand new, we have not finished installing all the software yet although the vpn was installed.
IRQL_NOT_LESS_OR_EQUAL
STOP: 0x00000000A (0x0B76AADB,0X000000002,0X00000000,0X804EBF24)
No files names or no other hexadecimal numbers. There was nothing else running except maybe the virus checker which is PC-CILLIN from Trend Micro.The last thing we installed was the wireless mouse. It was not running the VPN at the time However when we install the VPN on an XP machine, we get an error message saying
"Deterministic Network Enhancer Miniport has not passed Windows Logo testing to verify compatibility with windows XP."
Also once the installation of the VPN is done we often get IKERNEL.EXE The instruction at "0x771c741a" referenced memory at "0x00163588". The memory could not be read "read". Click on OK to terminate the program.
Although the VPN was not running I suspect the deterministic service is always running.
Is there any update for windows XP of the VPN software or at least the deterministic network enhancer?
Most of the vpn clients are 3.6 although we are now installing 3.6.3 as of this week. However we get the same error messages when we install it the new version 3.6.3as the old 3.6 version. I uninstalled the previous version first and then installed 3.6.3. All our machines are windows XP with Office XP, adobe acrobat Visio and MS Project.
