VPN Tunneling

[Aragon]

I have been reading and studying the digest for quite a while now
and have gained immeasurable insight from it. I am running Free
BSD 4.2 and Bind 8.2.4. I control my own IP  (/29) block forward
and reverse. Everything runs very smooth and well. My name
server is ns1.aragonsworld.net. I run Apache web server and
host several virtual domains. I have 7 Win98 boxes on my internal
net which access the net thru my Tripwire Firewall. Learning to
setup firewall rules was a long hard road. Here is my problem:
I access all my companies stuff thru Nortel Networks RSA Secure
VPN setup. I have a token card w/constantly changing authentication
numbers which I type in whenever I want to connect. As long as
I reconnect my one Win98 box 'outside' of my firewall and set the
IP to one of the other 5, VPN will work just fine. However then I
can't access my internal net. From the internal net, thru the firewall
I cannot connect. I don't know and can't figure out how to tunnel
thru my firewall with VPN. Any and all help would be greatly
appreciated. I have not yet recompiled my kernel w/IPSEC.