VPN, Firewall and ipchains

[Olivier Bekoin]

LAN  A -----  FW ----- Internet  -----LAN B
                        |
                        |
                    DMZ

Hi all,

Net A : 192.168.0.x
Mask A : 255.255.255.192
gateway : 192.168.0.1

NetB : 10.0.0.x
Mask B : 255.0.0.0
gateway : 10.0.0.1

NetDMZ : 192.168.0.65
Mask : 255.255.255.192
gateway : 192.168.0.66

FW have 3 lan cards and i will install redhat linux 7.0.
I want to use ipchains to let VPN trafic pass through ?

How can i set up it :

1- to permit remote dial up access to LAN A
2- to do site to site connectivity with LAN B

Thanks

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