# uname -a
SunOS SUN-2 5.10 Generic_127127-11 sun4u sparc SUNW,Sun-Fire-V240
# svccfg
svc:> select cde-login
svc:/application/graphical-login/cde-login> listprop arg
dtlogin/args astring
svc:/application/graphical-login/cde-login> setprop dtlogin/args=astring:" -udpPort 177"
svc:/application/graphical-login/cde-login> quit
# svcadm restart cde-login
# ps -ef |grep dtlogin
root 25145 23150 0 06:22:50 pts/1 0:00 grep dtlogin
root 24997 1 0 06:22:01 ? 0:00 /usr/dt/bin/dtlogin -daemon -udpPort 177