Hi! Been searching for a good packet-filter based firewall, with user-defineable rules. (Software firewall, Windows[2k] platform). Tried many, lost a month-time in search, but still haven't found the best. Any suggestions? Between, any one heard about CheckPoint firewall? Does it allow flexible rules? Basically I want to create rules like: DROP if (sent_bytes > recv_bytes) and (dir == IN) and (dst_port = 466x) and (sent_bytes > 10KB); I want to rule out eDonkey/eMule leechers, automatically. These mules ain't 'what u get is what u give', often. Any idea?? Thx in adv, Alex.