The Apache module mod_bwshare throttles HTTP requests to Apache 1 and 2 servers for each client IP address independently.
The mod_bwshare module accepts or rejects HTTP requests from each client IP address based on past downloads by that client IP address.
If the HTTP client's download rate exceeds specified levels, the reponse to the HTTP client is an HTML warning message.
A human browser will see a warning message indicating how long to wait.
Mod_Spambot is an Apache plugin which monitors the data being downloaded from a server. When the number of requests for a client exceeds a preset level no more downloads are allowed for a preset time.
mod_choke is has module for Apache that limits use by greedy customers. It' S two hand functions competitor are to limit the number of connections per IP, and to limit the misses At which apache sends dated to the customer.