How does Apache limit concurrent connections and download speeds under Linux _linux

Mod_limitipconn, this is an unofficial module of Apache, based on the same source IP for concurrent connection control, Bw_mod, it can be based on the source IP bandwidth constraints, they are Apache Third-party modules.

1. Download:

wget http://dominia.org/djao/limit/mod_limitipconn-0.22.tar.gz

wget http://bwmod.sourceforge.net/files/mod_bw-0.7.tgz

2. Installation

#tar-ZXVF mod_limitipconn-0.22.tar.gz
#cd mod_limitipconn-0.22
#vi Makefile
Modified: APXS = "/usr/local/apache2/bin/apxs" # here is their Apache APXS path, loading module

Or

#/usr/local/apache2/bin/apxs-i-c-a mod_limitipconn.c to load modules
#make
#make Install

#tar-XVF mod_bw-0.7.tgz
#cd MOD_BW
#/usr/local/apache2/bin/apxs-i-c-a/home/kenami/mod_bw/mod_bw.c

Below use VI to open Apache configuration file httpd.conf

The following two lines were found:

LoadModule Limitipconn_module modules/mod_limitipconn.so

LoadModule Bw_module modules/mod_bw.so

3. Configure

<ifmodule mod_limitipconn.c>
<location /home/bo@jb51.net/attachments/month _*> #需要控制的路径
Maxconnperip 3 #限制的线程数
Noiplimit index.htm #对此文件不做限制
</Location>
</IfModule>

Under the virtual host configuration file, add:

Bandwidthmodule on
Forcebandwidthmodule on
Bandwidth all 10000 #限速10K
Minbandwidth ALL-1

Configuration parameters are described as follows:
A. Bandwidthmodule on| Off

Whether to turn on the MOD_BW bandwidth throttling feature.

B. bandwidth [from] [BYTES/S]

Sets the maximum bandwidth for the specified client, 0 means no Limit

Bandwidth u:[user-agent] [BYTES/S]

C. minbandwidth [from] [BYTES/S]

Sets the minimum value for the specified client bandwidth, 0 for each client bandwidth maximum of 256bytes/s, and 1 for the maximum bandwith value

D. largefilelimit [Type] [Minimum Size] [bytes/s]

Sets the maximum bandwidth to access a file that exceeds a certain size, with a file type size of unit Kbytes

E. maxconnection [from] [Max]

Set the maximum number of concurrent connections for a specified client

F. Forcebandwidthmodule [on| OFF]

The default BW module will apply all requests, on to set the filter type

About from, that is, the client source can be divided into the following situations:

IP Specifies a single host

192.168.1.22

Specify network Segment

192.168.1.0/24 or

192.168.1.0/255.255.255.0

Domain Name Single host

Client1.jb51.net

Domain name specified range

. jb51.net

All clients

All

The above configuration can be configured for all clients as well as for a virtual host

Example one:

Bandwidthmodule on

Bandwidth All 307200

Bandwidth 192.168.1.2 102400

Bandwidth "U:^MOZILLA/5 (. *)" 102400

Bandwidth "U:wget" 204800

Forcebandwidthmodule on

Largefilelimit. avi 600 204800

Maxconnection all 100

Maxconnnection 192.168.1.2 5

The above configuration meaning:

Open MOD_BW, restrict all file types also open

All clients have a maximum bandwidth of 300k and a maximum concurrent connection of 100

The maximum bandwidth of the 192.168.1.2 is 100k and the maximum concurrent connection is 5

100k client Maximum bandwidth using Firefox

Maximum bandwidth for clients using wget is 200k

Maximum bandwidth for files exceeding 600k in AVI format is 200kbyte/s

Example two:

<virtualhost *>

Bandwidthmodule on

Forcebandwidthmodule on

Largefilelimit. avi 1 20000

Largefilelimit mpg 1 20000

Servername www.jb51.net

</Virtualhost>

This instance restricts the virtual host, specifying the file type AVI and the MPG maximum bandwidth of 20k,forcebandwidthmodule on must have.

Example three:

<virtualhost *>

Bandwidthmodule on

Addoutputfilterbytype MOD_BW text/html Text/plain

Bandwidth All 5000

Servername www.jb51.net

</Virtualhost>