I modified the port (new port is 8888)
and the error.log:
^[[0;32m[25/Apr/2017:11:17:27][11354.7fa7f3fff700][-driver:nssock_v4:0-] ^[[0m^[[0;39mNotice: nssock_v4:0: listening on [0.0.0.0]:8888^[[0m
^[[0;32m[25/Apr/2017:11:17:27][11354.7fa806011700][-main-] ^[[0m^[[0;39mNotice: nsmain: NaviServer/4.99.15 running^[[0m
now also I m unable to access openacs through browser