Recently, within the last 20 days I have had 3 out of 20 users report that they could not connect to our VPN connection.
They all were at different locations and have connected at these locations without any trouble in the past.
The problem is intermitant.
We think that it is a Zone alarm update that is causing this problem but, we can't prove/disprove the theory.
Here is what I know:
When it won't connect-If you disable zone alarm they can connect no problem-toggled "allow uncommon protocols at high security" in zone alarm, seemed to have no effect.
-opened up in zone alarm ports 1723, 1701, 1426 and added cvpnd.exe to allowed programs.
Nothing would let me in.-On the ISA VPN server, in query mode, you could see nothing trying to access it.
The "data" was never leaving the laptop.
-entire time I was able to connect and disconnect with another laptop no problem.-Both laptops set to use L2TP
-rebooted for good measure and was able to connect on the first try.
-changed all setting back, still was able to connect-Have both Cisco and an ISA server VPN in place.
I know about the install order for Cisco and Zone Alarm, it is being phased out anyway.-The only thing I can conclude is that when Zone Alarm doesn't want you to connect, it won't let you connect no matter what-The same laptops will connect or not connect
to the same networks (this is why the problem is intermitant).
No ryhme or reason that I see yet.
Anyone have any suggestions on things to try?
Oldsod I am going to call you out on this because I read some of your other posts and think you may have a good idea as to what is going on.
Operating System:Windows XP Pro
Software Version:7.1 (Vista)
Product Name:ZoneAlarm Pro