this is possibly due to the lack of IKE rekey as mentioned here https://svn.unix-ag.uni-kl.de/vpnc/trunk/TODO ('implement phase1 rekeying (with or without xauth-reauthentication)')
I've proposed a patch here: http://lists.unix-ag.uni-kl.de/pipermail/vpnc-devel/2015-June/004163.html
this is possibly due to the lack of IKE rekey as mentioned here https:/ /svn.unix- ag.uni- kl.de/vpnc/ trunk/TODO ('implement phase1 rekeying (with or without xauth-reauthent ication) ')
I've proposed a patch here: lists.unix- ag.uni- kl.de/pipermail /vpnc-devel/ 2015-June/ 004163. html
http://