hi all,
A client asked me for a VPN so I installed SME 7.0 on a PC for him and forwarded port 1723 from his netgear router.
It worked occasionally, but other times it would give various error messages.
I suspected a problem with the VPN passthru on the router so I changed the router for a US Robotics model I had kicking around.
When the problem persisted, I decided to use a different PC, I changed from a IBM to a HP PC. The problem persisted so I suggested a new router.
I installed a 3com router which states multiple pptp passthru on the box - the problem persisted. Working sometimes, problems other times. When there was a problem, the error messages varied.
So I decided to install SME 6.02 since I was using that successfuly in other places.
When the problem persisted, I told the customer I thought it was a problem with his ISP.
By this time, he had done some googling and asked me to try a router with built in VPN. I bought a Draytek 2800VG and now it works everytime.
I am as confused as you are - I don't expect you to have the answer but comments would be interesting.
ps. Since we know it is not the ISP, doubtful it is the hardware or the router, I guess you could ask about the state of the network cabling but the server is next to the router which is attached by a patch cable which has been replaced too.
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