We have a customer who is letting us access thier network in order to support thier sites over their wan. They have provided us with a user name and password for this. When I set up the VPN Network connection from the wiindows control panel and make the connection through a Linksys "home" router it works perfectly. If I change my connection to the Sonicwall TZ190 firmware version SonicOS Enhanced 126.96.36.199-23e all I ever get is failed authentications.
I have to admit that the Sonicwall setup is a bit beyond my comfort zone. I have poked around policies and I beleive that what i need is there but I am not too sure...
I did do two wireshark captures, one with each router connection to try to compare the two. There isn't much difference between them except for the failure response on the one vs the accepted responce to CHAP. There is more in there that I am missing.
I have explored the MTU size solution I found on this site but I believe that our customer would have to adjust thier settings in order to make that a valid test. Is that correct?
Anybody have any ideas as to what to try? Capture files availble on request.