No they don't (as far as I know). Only straight forward IPsec, no UDP passtrough or transparant IPsec NAT or anything like it.
And no IPsec AH but IPsec ESP.
Why do you want AH? Its authentication and hashing only, no encryption. There are a number of freeware VPN Client to VPN Gateway clients avaible that support IPsec ESP.
This thread was automatically locked due to age.