/ ip firewall filter
ad ch input pr tcp dst-po 82 act drop comm Worm.NetSky.Y@mm
ad ch input pr tcp dst-po 113 act drop comm W32.Korgo.A/B/C/D/E/F-1
ad ch input pr tcp dst-po 2041 act drop comm W33.Korgo.A/B/C/D/E/F-2