Use mod_limitipconn

Use mod_limitipconn 2015/10/27

	Use mod_limitipconn to limit concurrent connection per IP address.
[1]	Install mod_limitipconn.

# install from EPEL [root@www ~]#  yum --enablerepo=epel -y install mod_limitipconn

[2]	Configure mod_limitipconn as an example.

[root@www ~]#  vi /etc/httpd/conf.d/limitipconn.conf # set no limitation for default MaxConnPerIP 0 # set for /limit <Location /limit> # limit concurrent connection for 3 MaxConnPerIP 3 # not apply above if MIME type is "text/*" NoIPLimit text/* </Location> # set for /limit2 <Location /limit2> # limit concurrent connection for 2 MaxConnPerIP 2 # apply above if MIME type is "application/x-tar" OnlyIPLimit application/x-tar </Location> [root@www ~]#  systemctl restart httpd

[3]	Verify it work normally with a command "ab" which is included in httpd-tools package like follows.

[root@www html]#  ab -n 10 -c 10 http://localhost/limit/index.html  This is ApacheBench, Version 2.3 <$Revision: 1430300 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient).....done Server Software: Apache/2.4.6 Server Hostname: localhost Server Port: 80 Document Path: /limit/index.html Document Length: 130 bytes Concurrency Level: 10 Time taken for tests: 0.004 seconds Complete requests: 10 Failed requests: 0 Write errors: 0 Total transferred: 3910 bytes HTML transferred: 1300 bytes Requests per second: 2223.21 [#/sec] (mean) Time per request: 4.498 [ms] (mean) Time per request: 0.450 [ms] (mean, across all concurrent requests) Transfer rate: 848.90 [Kbytes/sec] received ..... ..... [root@www html]#  ab -n 10 -c 10 http://localhost/limit/test.gif  This is ApacheBench, Version 2.3 <$Revision: 1430300 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient).....done Server Software: Apache/2.4.6 Server Hostname: localhost Server Port: 80 Document Path: /limit/test.gif Document Length: 228 bytes Concurrency Level: 10 Time taken for tests: 0.005 seconds Complete requests: 10 Failed requests: 7 (Connect: 0, Receive: 0, Length: 7, Exceptions: 0) Write errors: 0 Non-2xx responses: 7 Total transferred: 4838 bytes HTML transferred: 2777 bytes Requests per second: 2182.45 [#/sec] (mean) Time per request: 4.582 [ms] (mean) Time per request: 0.458 [ms] (mean, across all concurrent requests) Transfer rate: 1031.12 [Kbytes/sec] received ..... ..... [root@www ~]#  ab -n 10 -c 10 http://localhost/limit2/test.tar  This is ApacheBench, Version 2.3 <$Revision: 1430300 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient).....done Server Software: Apache/2.4.6 Server Hostname: localhost Server Port: 80 Document Path: /limit2/test.tar Document Length: 10240 bytes Concurrency Level: 10 Time taken for tests: 0.006 seconds Complete requests: 10 Failed requests: 8 (Connect: 0, Receive: 0, Length: 8, Exceptions: 0) Write errors: 0 Non-2xx responses: 8 Total transferred: 24900 bytes HTML transferred: 22872 bytes Requests per second: 1785.40 [#/sec] (mean) Time per request: 5.601 [ms] (mean) Time per request: 0.560 [ms] (mean, across all concurrent requests) Transfer rate: 4341.44 [Kbytes/sec] received ..... .....