setsockopt(IPPROTO_IP, IP_FW_X, {SYNC_CENTRE_CONF, count=9999}) = -1
  errno=42 (Protocol not available)

Interpretation:
  ENOPROTOOPT => ipfw3 module not loaded; the SYNC_* cases in
  ip_fw3_ctl() are never reached. (Default kernel state.)
EXIT=0
DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64