Firewall/NAT

I have a problem to get office2 internet access throw monowall. From Office1 internet works perfectly.

Office2 can ping Office1
Office1 can ping Office2

But office2 can not get internet access throw the monowall on the office1. On the monowall firewall log i can see droped traffic from office2 network. I can´t understand why?

I have create a rule that would pass all traffic from office2 host/network.
Do i need to set up special rules in NAT table to get internet access work on office2?
I have not had any luck so far, any help would be appreciated.

Thanks and sorry for my bad english.
/Daniel

Scenario:
Office #1
Network 192.168.90.0/24
Default gateway 192.168.90.254 ( monowall)
Dedicated VPN gateway to Office2 = 192.168.90.253
Monowall - LAN interface = 192.168.90-254
Monowall - WAN interface = dynamic adsl

Office #2
Network 192.168.80.0/24
Default gateway 192.168.80.253
Dedicacted VPN gateway to Office1 = 192.168.80.253

I forgot to name that i have a static route from 192.168.90.0/24 to 192.168.90.253

/Daniel

The default LAN rule only allows traffic sourced from your LAN subnet, sounds like that's your problem.