🚀 go-pugleaf

I have a bit of a nightmare connection to put in place for a remote
office and was wondering if anyone could advise on a solution:

Internet = Router/Gateway === Linux Server 1
                                +
                                + PPP connection (2 x 56K modems)
                                +
                              Linux Server 2 ===== LAN

The Internet side (Linux Server 1) of the PPP connection has real IP
numbers. (I do have 3 extra IP's spare if needed)
The PPP connection have 192.168.2.x IP numbers.
The LAN side (Linux Server 2) of the PPP connection has 192.168.1.x
private IP numbers.

The PPP connection could be 100%, dial on demand or manual connection
yet to be decided (advice ?).

I need to firewall protect both ends of the PPP connection whilst
allowing FTP, HTTP, News & email traffic through from LAN to Internet.
(I could add an extra box in at either end to achieve this.)

Linux Server 2 and LAN also have HTTP, FTP, and an Oracle server that
sometimes need to be connected to by the Internet side of the
connection. There is also Video Conferencing (CU-SeeMe) used from LAN
out to the Internet.

LAN default gateway route will obviously be the eth0 IP on Linux
Server1, BIG NOTE: I have no control over the Router/Gateway on the 
Internet side so it looks as if IP Masq is required for Linux Server 1 
so that I can sort out any returning traffic from Internet side to LAN
side.

The Linux Servers currently are 586/133's but could easily be upgraded.

Could anyone help ?

Thanks,

Dominic Baines