Since december 2017, I experience some problems to connect to my University via vpnc, although I used to do it for years under mageia,
and nothing changed in the cisco-vpn config of my University. I could not solve the problem even after downgrading the current vpn version
to the one of mageia 5. The only -and unsatisfactory- turn around I could find was to install by hand old fedora rpm packets :
vpnc-0.5.3-28.svn550.fc26.x86_64.rpm and vpnc-script-20140805-5.gitdf5808b.fc26.noarch.rpm, via the unsafe command line:
rpm -i --nodeps vpnc-0.5.3-28.svn550.fc26.x86_64.rpm vpnc-script-20140805-5.gitdf5808b.fc26.noarch.rpm
Those packets can be found on https://rpmfind.net/
Any better solution using only mageia packets is welcome !