# Pastebin kG9uSqaR
# cat /etc/exports
# https://man.freebsd.org/nfsv4
# V4: /usr -sec=sys -ro -mapall:nobody -network=172.16.0.0/16
V4: /usr -sec=sys -ro
/usr/src -ro
/usr/obj -ro
/usr/ports -ro

# permissions
# ls -AFGhld /usr/{src,obj,ports}
drwxr-xr-x   3 dch wheel    3B Feb 28 23:27 /usr/obj/
drwxr-xr-x  70 dch wheel   86B Apr  1 06:55 /usr/ports/
drwxrwxr-x  27 dch wheel   47B Mar 31 13:26 /usr/src/