[pptp-server] Newbie question: routing problem?

[Cowles, Steve]

Since your able to connect to your PPTP server, it sounds like you have
properly configured your SMC firewall and its doing its job. BTW: SMC does
support PPTP/IPSEC protocols. Most of these so called "firewall in a box"
units do. I've installed dozens of them. Checkout:

http://www.smc.com/index.cfm?action=support_tools_list_FAQs&faq_category=5

Anyway, I would think your problem is related to routing at the PPTP server.
Specifically, ip_forwarding. Remember, even though your PPTP server only has
one Ethernet interface, its actually acting as a router so it need
ip_forwarding enabled. i.e. route packets of data to/from eth0<->ppp0. 

Also, make sure eth0 is acting as a proxy for arp requests on behalf of the
PPTP client. i.e. proxyarp.

Steve Cowles