Starting with Mandriva 2009.1 I had been using vpnc, a VPN client for CISCO
concentrator 3000 for several years.

From the beginning, I wondered why the connection always dropped after a maximum
of 8 hours, but assumed that this was done by IT due to order from management.

At the beginning of 2018, I tried to set up a VPN connection also to connect
single-user PCs with a FritzBox-router from AVM, Berlin, since the recent
AVM routers can work as a VPN server and hence they can be used in LAN-to-LAN-
connection mode to combine multiple single local networks.

I created a user for VPN service in the FritzBox and tried to connect from an
intel box, running Mageia 5 together with vpnc version 0.5.3-11 out of MGA5.
This did never work. There always occured an "illegal payload" error.

As a workaround, I installed the necessary libraries and got vpnc version 0.5.3-13
from Mageia 6. I hoped that the issue was solved when I created a new rpm based on
the new version. After installation I had to see, that the "illegal payload"
error still occurs.

So, my first assumption was, that the router was not capable of establishing such
a VPN connection and tried the same on a Raspberry, running Raspbian OS, as well
as SuSE Leap 42.2, and both worked instantly.

So, finally, I got the source RPM from SuSE Leap 42.2, made some minor
modifications to the spec file, re-created the source and the binary RPM and installed it.

You find the newly created files,

- vpnc-0.5.3r550-15.mga5.i586.rpm
- vpnc-0.5.3r550-15.mga5.src.rpm

in the same directory.

This version of vpnc cooperates with AVM routers without any problem, now, and
it does not hang up the connection automatically after 8 hours.

How to install:

1. Download the binary RPM
2. Be root
3. Remove the old vpnc version without interfering with net manager etc.:
   rpm --nodeps -e vpnc
4. Go to the directory where your new version is stored and install it:
   rpm -i vpnc-0.5.3r550-mga5.i586.rpm