Can anyone tell me how to assign specified
PPP interface when pptpd calls pppd? For our case, we need to reserve ppp0 to
ppp2 for other applications to use, so I have to assign PPP interface starting
from ppp3 for pptpd. How to modify it? It the source code needs to be modified,
would you please tell me which function or source file that I should investigate
or trace? Any help will be appreciated.