documtentation of pppd scripts mess

dambacher · Last edited by dambacher on Wed Jul 16, 2008 5:17 am; edited 1 time in total

Hi there

I just upgraded pppd and rp-pppoe and nothing worked anymore.
the scripts in /etc/ppp look horrible like work in progress with same code snipplets in different files, sometimes commented out, and i did not find any documentation on how and what works and how to insert customized code safely.

I need special routing and firewalling commands for each interface so i hat do deactivate the whole bunch by overwriting ip-up and ip-down completely.

Is there somebody out there who dived into this?

/dambacher

dambacher · Posted: Sun Jul 13, 2008 12:32 pm Post subject:

OK i took some time to figure it all out.

On my Server I found 3 packets wich put files into /etc/ppp
ppp
rp-pppoe
isdn4k-utils

And as this system runs gentoo since 2004, it saw different versions of baselayout and ppp.
I modified some of the files for my extended network setup, too.
And I use per device ip-up / ip-down scripts to setup extended routing tables.
so I have an /etc/ppp/ip-up.ppp0 or /etc/ppp/ip-up.ppp1 or /etc/ppp/ip-down.ppp0
and options.ppp0

The problem is that the new ppp version did not change ip-up if it was changed before,
and therefore etc-update did not show up anything.
So a mix of old and new config files was created.

This is no problen until the new ppp ebuild found a file "/etc/ppp/ip-up.local" and converted it to the new configuration schema (to /etc/ppp/ip-up.d/90-local) by renaming and moving it. Bam - no internet anymore.

This is how it should work now:

* you basically do all your ppp/pppoe configuration in /etc/conf/net
* with one exception: passwords go to /etc/ppp/pap-secrets
* you link net.lo to net.ppp0 etc. and activate them in your runlevel to make use of the configuration.
* the networking scripts of baselayout do the rest of the work and configure and fire up ppp.

* when the link is activated, the /etc/ppp/ip-up script is running. it sources every script in /etc/ppp/ip-up.d in alphanumerical order.
* So if you need further configuration just drop a file to /etc/ppp/ip-up.d or /etc/ppp/ip-down.d to do what you like.
This works same like with /etc/env.d or /etc/modules.d

Upgrade guide for pppd-scripters

before the upgrade:
* backup /etc/ppp for heavens sake!
* stop every ppp service
* put all your script modifications of ip-up and ip-down to /etc/ppp/ip-up.local or ip-down.local
* put all your options into /etc/conf.d/net. Look at /etc/conf.d/net.example on how to do it the gentoo way
(you don't need any "unit" configuration as the gentoo scripts handle this for you now)
* remove /etc/ppp/ip-up and /etc/ppp/ip-down
* you can leave your interface-special files (a relict from former versions) /etc/ppp/ip-up.ppp0 or alike where there are.
you shold have a line like

mrness · Posted: Fri Jul 18, 2008 6:48 am Post subject:

dambacher · Posted: Fri Jul 18, 2008 9:36 am Post subject:

zmedico · Posted: Sat Jul 19, 2008 6:21 am Post subject:

dambacher · Posted: Sat Jul 19, 2008 9:56 pm Post subject:

thanks to zmedico
that were the right tips for me!
/dambacher