The pppdialin module has been introduced in Linuxconf 1.10r26. The
/usr/lib/linuxconf/lib/ppplogin has been enhanced to support
pppparms. This is considered experimental.
Unfortunately, the PPP daemon (pppd) can't accept a new option after a PAP authentication. This makes the pppdialin module much less useful for PAP. Once the pppdialin has gained widespread usage, we intend to modify the pppd daemon so it supports this. For now, use PAP (no login script) for normal setup and ask clients to use a login script for those who need special handling (routing, fixed IP, email queuing, etc.).