Set the debug info level, possible values noen, urgent (default), misc, loud
useful when debugging, use set debug loud or use pfctl:
$sudo pfctl -x loud $ tail -f /var/log/messages Oct 4 11:41:11 skapet /bsd: pf_map_addr: selected address 194.54.107.19 Oct 4 11:41:15 skapet /bsd: pf: loose state match: TCP 194.54.107.19:25 194.54.107.19:25 158.36.191.135:62458 [lo=3178647045 high=3178664421 win=33304 modulator=0 wscale=1] [lo=3111401744 high=3111468309 win=17376 modulator=0 wscale=0] 9:9 R seq=3178647045 (3178647044) ack=3111401744 len=0 ackskew=0 pkts=9:12 Oct 4 11:41:15 skapet /bsd: pf: loose state match: TCP 194.54.107.19:25 194.54.107.19:25 158.36.191.135:62458 [lo=3178647045 high=3178664421 win=33304 modulator=0 wscale=1] [lo=3111401744 high=3111468309 win=17376 modulator=0 wscale=0] 10:10 R seq=3178647045 (3178647044) ack=3111401744 len=0 ackskew=0 pkts=10:12 Oct 4 11:42:24 skapet /bsd: pf_map_addr: selected address 194.54.107.19
Lots of info, enough data for auto-DOS if you're not careful