netstat show there's a raw socket port 255 open

[chinyu0704]

hi, ldx, may i ask why there is a raw socket port 255 open after instantiate the iptc.Table like: filter = iptc.Table('filter') netstat -anp shows: raw 0 0 0.0.0.0:255 0.0.0.0:* 7 112000/python to me, i'm not instantiating the raw table but the filter table, so the raw socket open seems unreasonable to me