Problems with X11 traffic over ssh in pf.conf

[carlopmart]

Hi all,

 I need to allow X11 services over ssh for my developers on one openbsd box. 
Rule for ssh service works ok, but when I try to start a X11 app (like xterm for 
example on destination host) doesn't works.

 On openbsd side nothing is dropped. Somebody knows how can I debug this?? Do I 
need to open additional ports or protocols??

Many thanks.

--
CL Martinez
carlopmart {at} gmail {d0t} com