HOWTO: PPtP VPN

See below. I'm trying this on a Duo with 4.1.8-T5 beta firmware. " Package ppp is not configured yet." is the error. Suggestions please.

Thanks.


london:~# apt-get update
Get:1 http://www.readynas.com readynas/ Packages [19.9kB]
Ign http://www.readynas.com readynas/ Release
Get:2 http://archive.debian.org sarge/main Packages [4405kB]
Get:3 http://archive.debian.org sarge/main Release [99B]
Get:4 http://archive.debian.org sarge/contrib Packages [62.7kB]
Get:5 http://archive.debian.org sarge/contrib Release [102B]
Get:6 http://archive.debian.org sarge/non-free Packages [53.2kB]
Get:7 http://archive.debian.org sarge/non-free Release [103B]
Get:8 http://archive.debian.org sarge/main Sources [1323kB]
Get:9 http://archive.debian.org sarge/main Release [100B]
Get:10 http://archive.debian.org sarge/contrib Sources [24.7kB]
Get:11 http://archive.debian.org sarge/contrib Release [103B]
Get:12 http://archive.debian.org sarge/non-free Sources [23.5kB]
Get:13 http://archive.debian.org sarge/non-free Release [104B]
Fetched 5912kB in 40s (147kB/s)
Reading Package Lists... Done
london:~# apt-get install pptp
Reading Package Lists... Done
Building Dependency Tree... Done
E: Couldn't find package pptp
london:~# apt-get install pptpd
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
libpcap0.7 ppp
Suggested packages:
libatm1
The following NEW packages will be installed:
libpcap0.7 ppp pptpd
0 upgraded, 3 newly installed, 0 to remove and 71 not upgraded.
Need to get 460kB of archives.
After unpacking 1528kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.debian.org sarge/main libpcap0.7 0.7.2-7 [70.7kB]
Get:2 http://archive.debian.org sarge/main ppp 2.4.3-20050321+2sarge1 [330kB]
Get:3 http://archive.debian.org sarge/main pptpd 1.2.1-4 [59.3kB]
Fetched 460kB in 5s (82.6kB/s)
Selecting previously deselected package libpcap0.7.
(Reading database ... 12668 files and directories currently installed.)
Unpacking libpcap0.7 (from .../libpcap0.7_0.7.2-7_sparc.deb) ...
Selecting previously deselected package ppp.
Unpacking ppp (from .../ppp_2.4.3-20050321+2sarge1_sparc.deb) ...
Selecting previously deselected package pptpd.
Unpacking pptpd (from .../pptpd_1.2.1-4_sparc.deb) ...
Setting up libpcap0.7 (0.7.2-7) ...
Setting up ppp (2.4.3-20050321+2sarge1) ...
install: invalid group `dip'
dpkg: error processing ppp (--configure):
subprocess post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of pptpd:
pptpd depends on ppp (>= 2.4.3-20041231); however:
Package ppp is not configured yet.
dpkg: error processing pptpd (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
ppp
pptpd
E: Sub-process /usr/bin/dpkg returned an error code (1)
london:~# apt-get install ppp
Reading Package Lists... Done
Building Dependency Tree... Done
ppp is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 71 not upgraded.
2 not fully installed or removed.
Need to get 0B of archives.
After unpacking 0B of additional disk space will be used.
Setting up ppp (2.4.3-20050321+2sarge1) ...
install: invalid group `dip'
dpkg: error processing ppp (--configure):
subprocess post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of pptpd:
pptpd depends on ppp (>= 2.4.3-20041231); however:
Package ppp is not configured yet.
dpkg: error processing pptpd (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
ppp
pptpd
E: Sub-process /usr/bin/dpkg returned an error code (1)