可以限速的找到两个，一个是Bandwidth Module，Version 0.5rc1， Bandwidth and Connection control per Virtual Host or Directory， Last Updated January 28th, 2005，http://www.ivn.cl/apache/
另外一个mod_cband，Version 0.9，A virtual host
bandwidth-limiting module provided to solve the problem of limiting
virtualhosts bandwidth usage，Last Updated September 07th, 2005，http://cband.linux.pl/

可以限制连接数的也有两个：

mod_vhost_limit，v0.1，
Restrict the number of simultaneous connections per vhost，
Last Modified : 2004.02.26，http://www.ivn.cl/apache/

mod_limitipconn，Version 0.22，Limit the number of simultaneous connections from a single client IP
address. Contains rudimentary support for detection of proxy clients，Last Updated July 22nd, 2003，http://dominia.org/djao/limitipconn2.html

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