drcom-client is an ISP client for Dr.COM networks, a specialized broadband access and authentication system produced by Doctorcom Corp, which has been used in many universities in China. Compared to the official Windows client, it avoids problems with the prevention of NAT and proxy servers.
A fail2ban lite. IPQ BDB is a netfilter userspace daemon that can block or mark IP packets according to iptables rules that issue the corresponding -j NFQUEUE, as well as a Berkeley database of bad IPv4 addresses. A log parser and a banning utility add entries to the database. An IP has to be caught a configurable number of times before being blocked. Transitions between blocked and non-blocked are faded using probabilities. A halving period governs IP rehabilitation.