Cant access my gui page from wan after a while

[hadi57]

hi

i am using 5 pfs boxes, and recently started to face problems with one:

after making connection from wan, and do some work like adding users, modifying users, etc, gui stops, but if i try to pfs box from lan every thing still seems fine, this wasn't happening before, and not happening on other boxes, but i still can access to the console via ssh from wan and reboot then every thing work back fine.

how i can restart the gui page from the console?

any body faced this and fixed it?

i am using 1.2

help appreciated

hadi57