On Fri, 3 Apr 2009, shawnlau wrote: > Apr 3 17:02:43 left pluto[16151]: "ntn" #6: ERROR: netlink response for Add SA comp.6b44 at 192.168.1.7 included errno > 22: Invalid argument > > Apr 3 17:02:43 left pluto[16151]: | add_sa ipcomp failed Looks like the ipcomp module is not loaded or not compiled. Try with compress=no on both sdies. Paul