[pptp-server] problem with routing table on client

[bao]

Good day everyone,

I'm using RH7.3, kernel 2.4.18-3 with ppp-mppe 2.4.1-6 (rpm version) and 
pptpd 1.1.2-2. Everything works great
except one little problem. Our network is 186.200.127.160-191. When VPN 
is up, I check the client side routing
table and see an entry similar to this:
186.0.0.0    255.0.0.0    186.200.127.187    186.200.127.187    1

I have seen discussions about Microsoft always giving the wrong subnet 
mask (i.e., 255.0.0.0).
But with this huge subnet 186.0.0.0 instead of 186.200.127.0 (desirably 
186.200.127.160 and subnet mask
255.255.255.224), there is possibly a huge amount of traffic going 
to/from this huge network. And all of it
will be blocked by the firewall on the pptp server.

Is there any work-around that anyone has known of?

Thanks for any help