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IPSEC/L2TP not working in windows 7
shyaminayesh
Member
in Help
i setup IPSEC/L2TP VPN with Cent OS box and i can connect to it using my android mobile with home network. but unfortunately when i try to connect using windows 7 it prompt me "error 789". if you know how to fix this please let me inform. i try google already 100+ times 
thank you very much for reading. 
Comments
Google says this is a NAT issue. Have you check that?
i can connect using my mobile. so it's confirm Cent OS VPN setup is working. do you have any idea how to troubleshoot NAT issue ?
Do you use SoftEtherVPN?
I'm wondering if this is the issue: http://support.microsoft.com/kb/926179
Fix several different error numbers when I was using L2TP. Why L2TP and not OpenVPN (or Tinc)?
EDIT: Exact issue with solution (read between the lines). (http://social.technet.microsoft.com/Forums/windows/en-US/630488b8-e638-488d-803a-08ef9281e4fb/windows-7-ipsecl2tp-vpn-connection-problem)
The MS KB article should fix it.
I would suggest softether vpn. It has l2tp built in and works flawlessly on my laptop (win 8.1) and Android phone.
i try this. still not working
Have you enabled IPsec Policy Agent, IKE and AuthIP IPsec Keying Modules services?
yep. i enable both services