mod_curb mod_curb is a cumulative bandwidth limiting module for Apache.
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Apache module Apache bandwidth limit bandwidth URL redirect limiter

mod_curb Description

mod_curb is a cumulative bandwidth limiting module for Apache. mod_curb is a cumulative bandwidth limiting module for Apache.This module was written to solve the problem of limiting the bandwidth usage of a hosted website.Several small hosting companies will happily give you a co-located box with a set data transfer limit, such as '2Gb of traffic per month'. They will charge you extortionately if you go over this limit... I've looked around and I can't find a simple software solution to limit the data that Apache will serve, so I wrote one.Alternative SolutionsThe obvious solution is to store your files on a FTP server such as ProFTPd, and get Apache to redirect to that using mod_proxy, or something similar.That's the only approach I could think of - things like mod_bandwidth, or mod_throttle just allow you to limit the current connections to prevent saturation - they don't keep track of the cumulative transfer over a given time period. (Yes mod_throttle does have 'Volume' limiting, but its not sufficient for my kind of limiting).OptionsThere are only a few configuration options to play with:· BandWidthExceeded The URL to redirect to if the bandwidth is exceeded.· BandWidthLimit The maximum bandwidth to allow, eg '2Gb', '650Mb'· BandWidthMonitorURL A URL which may be used to monitor in real time the current bandwidth served, eg '/mod_curb/status'.More options should be forthcoming to vary the timeframe for which allocations are possible...BuildingIf you're running Debian, or RedHat Linux and you have got the 'apache-dev' package installed you should be able to build the module with a simple 'make -f Makefile-dev install'.Otherwise rebuild Apache from source with something like this: ./configure --add-module=../mod-curb-1.0/mod_curb.c --enable-shared=curb --enable-shared=status --enable-module=so A minimal configuration will look something like this: # Bandwidth limiting requires mod_status LoadModule status_module libexec/mod_status.so ExtendedStatus on # Load the limiting code. LoadModule mod_curb libexec/mod_curb.so # Go here if the limit is exceeded BandWidthExceeded http://some.other.com/sorry.html BandWidthLimit 750Mb BandWidthMonitorURL /bandwidth-status/Limitations:· This module will only work for complete servers, it will not handle virtual servers at all. Eventually be an Apache 2.x module implementing this functionality for virtual hosts, but I see no reason to tidy/release it prior to more widespread adoption of Apache2.· Once the bandwidth limit has been reached the server will redirect all further requests to a user specified URL. (Usually a static page which says something like 'Bandwidth exhausted, return in an hour').· To reset things you must restart the server. If the bandwidth limit is a few hundred Mb a day then simply setup a cronjob to do the necessary restart.· This module requires the use of mod_status, and 'ExtendedStatus On' to function normally.Common ProblemsIf you visit the status URL you've setup and the bandwidth transferred stays at '0' then you've almost certainly not enabled mod_status, or included 'ExtendedStatus On' in your configuration file...What's New in This Release:· Fixed MIME-types bug· Right-align byte counts on the status page

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