FreeBSD Firewall + NAT Traversal + IPsec

[John Mok]

Dear Tom,

Thank you for your quick reply.

I would like to know more on the issue. To my understanding, since the 
source address of the IP packet from the client would be modified on the 
NAT, normally it would fail AH check on the IPsec VPN gateway, or the 
FreeBSD NAT has built-in compliance with RFC3947?

Thank you,   John Mok


Tom Skeren wrote:

> John Mok wrote:
>
>> Hi,
>>
>> I'm new to FreeBSD. Is it possible make a FreeBSD box with firewall + 
>> NAT, such that client PC(s) from the NATed internal network could 
>> connect to a VPN gateway on the Internet :-
>>
>>  client PC ----- FreeBSD Firewall + NAT ---- Internet ---- IPsec VPN 
>> gateway
>> 192.168.x.x/16                                              (e.g. 
>> Checkpoint FW-1)
>> (VPN client)
>>
>> I hope someone could help to advise what software is required on the 
>> FreeBSD box to NAT traversal work and where to get the HOWTO(s)?
>
>
> Should be no problem.
>
> <http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-natd.html> 
>
>
>>
>> Thanks a lot.
>>
>> John Mok
>>
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>
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