Linuxconf should have buttons for each of the ppp options
that can be specified (along with a catchall to support new
options), with help for each option, so you can easily
determine what options to set, without having the NET-3
and/or pppd man page open while running linuxconf.
Glancing at the pppd 2.3.5 man page, options that should be
setable include: passive, bsdcomp, chap-interval,
chap-max-challenge, chap-restart, deflate, demand, domain,
holdoff, idle, ipcp-accept-local, ipcp-accept-remote,
ipcp-max-failure, ipcp-max-terminate, ipcp-restart, ipparm,
all of the ipx options, all of the lcp options, ms-dns,
ms-wins, noipdefault, all of the pap options, persist,
predictor1, vj-max-slots, welcome.
This is really an enhancement request, not a bug.
This has been assigned to a developer for future enhancement requests.
I disagree with this request. We specifically chose the options
that would be useful to the most people to avoid being confusing;
the other options are only useful to people who know what they
want to do anyway. We are willing to consider adding specific
options, but we need a coherent argument why each particular option
would have wide use before adding it.