More specific information for certain ISPs is available from a variety of sources:
Demon Internet
ftp://ftp.demon.co.uk/pub/unix/linux/Demon/slack3.0.help.tgz
Netcom
http://www.netcom.com/bin/webtech/NetCruiser/Operating_Systems/Linux/linux.cfg.html
PowerTech, Telenor Online, Telia
http://www.kvaleberg.com/no-isp.html
Stanford
http://www-leland.stanford.edu/~wkn/Linux/network/network.html
MCI
http://www.kvaleberg.com/linux-mci.html
SISCOM
http://www.siscom.net/support/linux_setup.htm
AOL is not possible since AOL uses a proprietary protocol.
If you can supply ISP specific information not listed here, please get in touch.
The Linux Documentation Project book called Linux Network Administrator's Guide by Olaf Kirch is pretty mandatory for anyone that will set up and maintain anything involving TCP/IP and Internet
ftp://sunsite.unc.edu/pub/Linux/docs/linux-doc-project/network-guide/nag-1.0.ascii.tar.gz
The documentation that follows each software package will normally give you all the detailed information you need, if not always the overview. The man-pages will be the first place to look. Try for instance:
man pppd
You will also find some documentation about certain programs in the /usr/doc tree, although this is not always well structured.
The following HOWTOs will be highly relevant:
Red Hat has a mailing list for PPP issues; to join send an email to
redhat-ppp-list-request
with the subject line
subscribe
Information here is collected from many sources. Thanks to the following that either indirectly or directly have contributed:
Adam Holt <holt@graphics.lcs.mit.edu>
Arne Coucheron <arneco@oslonett.no>
Arne Riiber <riiber@oslonett.no>
Arnt Gulbrandsen <agulbra@troll.no>
Bjorn Steensrud <bjornst@powertech.no>
Gisle Hannemyr <gisle@a.sn.no>
Hans Amund Rosbach <haro@sesam.dnv.no>
Hans Peter Verne <hpv@ulrik.uio.no>
Harald T Alvestrand <Harald.T.Alvestrand@uninett.no>
Harald Terkelsen <Harald.Terkelsen@adm.hioslo.no>
Haavard Engum <hobbes@interlink.no>
James Youngman <JYoungman@vggas.com>
Johan S. Seland <johanss@sn.no>
John Phillips <john@linux.demon.co.uk>
Jorn Lokoy <jorn@oslonett.no>
Kenneth Tjostheim <kenneth.tjostheim@asplanviak.no>
Kjell M. Myksvoll <kjell.myksvoll@fou.telenor.no>
Kjetil T. Homme <kjetilho@math.uio.no>
Michael Meissner <meissner@cygnus.com>
N J Bailey <N.J.Bailey@leeds.ac.uk>
Nicolai Langfeldt <janl@math.uio.no>
Ove Ruben R Olsen <Ove.R.Olsen@ub.uib.no>
R. Bardarson <ronb@powernet.net>
Steinar Fremme <steinar@fremme.no>
Sverre H. Huseby <sverrehu@ifi.uio.no>
Trond Eivind Glomsrod <teg@stud.imf.unit.no>
Tommy Larsen <tommy@mix.hive.no>
Yves Bellefeuille <yan@storm.ca>