[pptp-server] pppd and subnet mask fun

Eric K. Wong eric at kortex.net
Sat Dec 25 23:13:50 CST 1999


Upon reading the pppd man pages and checking the pppd source a bit, it
appears the "netmask" parameter is solely for setting the server-side
netmask.  It doesn't appear there's a means of sending a netmask to the
client to use.

I find this odd and unbelievable.  Please someone correct me, since I
happen to be one of the unlucky few who have chosen 10.0.0.0/24 subnets
and wish to connect to more than one VPN simultaneously in w2k... needless
to say everything to 10.0.0.0/8 routes out the first PPTP connection
established.

Manually fixing the routes using MS's screwy route command works, but it's
a real hassle for non-networkgeeks.

This site documents similar behaviour when using NT Server as the PPTP
server.

http://www.ntfaq.com/ntfaq/ras19.html#ras19

This must have been thought of during standardization.  It looks like a
hard-coded script on the client side needs to be run after connection for
the time being.

Eric





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