I am connecting wirelessly to my Soekris 4521 wireless OPT1 interface 
from my laptop (Fedora Core 2).

OPT1 10.10.10.1
PPTP 10.10.111.254

I then connect using PPTP [http://pptpclient.sourceforge.net/], I 
configure it to point to my 'external' WAN IP address.  Everything seems 
to work fine.  I know I am going through the PPTP interface because I 
have full external connectivity.  If I just connect to wirelessly 
without using the PPTP client I see only connections that I have allows 
for in the firewall rules for the OPT1 interface.

I don't have another wireless client available at the moment to sniff 
traffic, but I want to be sure traffic is really encrypted over the PPTP 
tunnel, based on the above info, is it?  Am I following the right 
procedure above or can/should I be doing something different or better?

Wireless Client netstat -rn below:
# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt 
Iface
my.ext.ip.here 10.10.10.1      255.255.255.255 UGH       0 0          0 ath0
10.10.111.254   0.0.0.0         255.255.255.255 UH        0 0          0 
ppp0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 
ath0
10.0.0.0        0.0.0.0         255.0.0.0       U         0 0          0 
ath0
0.0.0.0         0.0.0.0         0.0.0.0         U         0 0          0 
ppp0

Louis