Hi, > If I return FALSE from the plugin_cb function Charon segfaults. strongSwan version? Can you provide your custom code? > charon[30403]: segfault at 0 ip (null) sp bfb6f12c error 14 in charon[8048000+3000] " A sane GDB backtrace would help, for example as shown when using "ipsec start --attach-gdb"? Regards Martin