[jboss-user] three dynamic tcp ports

Hi, On my jboss-4.2.1.ga server, I always found that there are three dynamic ports are listening, they are bind to all ip addresses, even I start jboss with "-b 127.0.0.1", I can still see those ports: lsof -p 393 | grep LISTE java 393 pnadmin 118u IPv6 285300 TCP localhost:8083 (LISTEN) java 393 pnadmin 120u IPv6 285304 TCP localhost:1099 (LISTEN) java 393 pnadmin 121u IPv6 285302 TCP localhost:1098 (LISTEN) java 393 pnadmin 122u IPv6 285306 TCP *:34929 (LISTEN) java 393 pnadmin 125u IPv6 285308 TCP *:34930 (LISTEN) java 393 pnadmin 126u IPv6 285315 TCP *:34932 (LISTEN) java 393 pnadmin 128u IPv6 285318 TCP localhost:krb524 (LISTEN) java 393 pnadmin 129u IPv6 285320 TCP localhost:4445 (LISTEN) java 393 pnadmin 130u IPv6 285321 TCP localhost:4446 (LISTEN) java 393 pnadmin 135u IPv6 285335 TCP localhost:3873 (LISTEN) java 393 pnadmin 152u IPv6 285454 TCP localhost:webcache (LISTEN) java 393 pnadmin 153u IPv6 285455 TCP localhost:8009 (LISTEN) java 393 pnadmin 155u IPv6 285457 TCP localhost:8443 (LISTEN) java 393 pnadmin 156u IPv6 285458 TCP localhost:8444 (LISTEN) java 393 pnadmin 185u IPv6 285565 TCP localhost:8093 (LISTEN) Does anyone know how to what are these ports (34929,34930,34931)? Is it possible to make it bind to fixed port? Thanks, Donghui