Looks like here is the bug where apparmor support was added for charon-system:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=866327
There does not seem to be any reference to ipt_CLUSTERIP there and from the source it appears the libcharon does appear to try to write to the referenced dir:
./src/libcharon/plugins/ha/ha_kernel.c:#define CLUSTERIP_DIR "/proc/net/ipt_CLUSTERIP"
Looks like here is the bug where apparmor support was added for charon-system:
https:/ /bugs.debian. org/cgi- bin/bugreport. cgi?bug= 866327
There does not seem to be any reference to ipt_CLUSTERIP there and from the source it appears the libcharon does appear to try to write to the referenced dir:
./src/libcharon /plugins/ ha/ha_kernel. c:#define CLUSTERIP_DIR "/proc/ net/ipt_ CLUSTERIP"