[pptp-server] Problem Connecting Win98 to pptpd on Linux

[Sean O'Dell]

I'm stuck for what to try next getting Win98 connected to pptpd.  I'll try 
and be brief:

I am trying to establish a VPN between my home office and another office 
downtown.  I followed the PoPToP documentation for installing a server under 
linux and almost have it working.  I installed the Microsoft VPN adapter and 
have it, NDISWAN, TCP/IP and the dial-up adapter all happily connected 
together.

What's wrong: I can connect my home computer to the remote server running 
pptpd, but it accepts ANY username/password (it seems to ignore what's in 
/etc/ppp/chao-secrets), it doesn't change my home computer's IP in any way 
(it retains the local private IP issued on boot-up) and I can't browse any 
shared folders/files on the remote network.

Me:
	DSL
	linux kernel 2.4.2
	iptables-based firewall
	single public ip masquerading private IPs of 192.168.1.0/254
	DHCP issuing dynamic IPs in the private range

Downtown:
	T1
	linux kernel 2.4.2
	iptables-based firewall (port 1723 is open and GRE packets are accepted)
	single public ip masquerading private IPs of 192.168.1.0/254
	DHCP issuing dynamic IPs in the private range

My home computer is behind a gateway/firewall and has a private masq IP of 
192.168.1.2.  The server is running a firewall and has a public internet IP 
and is running pptpd bound to the public IP, although it also masquerades IPs 
for the remote private network.

I'm pretty sure I did EVERYTHING the documentation said to do, so I'm 
guessing I have made some basic, stupid mistake somewhere which is not 
covered in the documentation.

Does anyone have any idea what I should be checking?  What mis-configuration 
I may have done that would cause this?