Setting up Microsoft compatible encryption and authentication with PoPToP

Grab yourself a clean copy of the PPP deamon version 2.3.8 (ppp-2.3.8). I usually go here for my PPP files.

Grab youself the MSCHAP/MPPE diff file and the RC4 files (see README.MPPE of the diff file).

Follow these instructions: Note: [] are example commands to run

• extract the archive to your local file system [tar zxvf ppp-2.3.8.tgz].
• copy the MSCHAP/MPPE diff file to ppp-2.3.8/
• copy the RC4 files (rc4.h and rc4_enc.c) to ppp-2.3.8/linux/
• [cd ppp-2.3.8]
• extract the diff file [gunzip ppp-2.3.8-mppe-others-norc4_TH7.diff.gz]
• patch the diff [patch -p1 < ppp-2.3.8-mppe-others-norc4_TH7.diff]
• [./configure]
• [cd linux]
• [./kinstall.sh]
• [cd ..]
• [make]
• make a backup of your pppd if your so inclined
• copy the new pppd over the old one [cat pppd/pppd > `which pppd`]
• [cd /usr/src/linux]
• [make modules SUBDIRS=drivers/net]
• [make modules_install]
• [rmmod ppp]
• [insmod ppp]
• [insmod ppp_mppe]

Here is an example PPP options file (/etc/ppp/options):

lock
debug
auth
+chap
+chapms
+chapms-v2
mppe-40
mppe-128
mppe-stateless

Here is an example chap-secrets file (/etc/ppp/chap-secrets)

username * password *

Setup your Windows client to support data encryption. Run PoPToP and connect!