How to limit bandwidth in Squid - Part 4

To limit the bandwidth in SQUID

Squid proxy server is used to limit bandwidth usage for each user (or) for a whole network using classes. In this article we will learn how to limit bandwidth using delay class 1 and class 2.

To block with keywords and extensions in Squid visit,
https://www.linuxhelp.com/how-to-block-keywords-and-extensions-in-squid-2/

To configure Squid visit,
https://www.linuxhelp.com/how-to-configure-acl-rule-by-timing-and-browser-in-squid/

To limit bandwidth in Squid visit,
https://www.linuxhelp.com/how-to-limit-bandwidth-squid/

Class 1 type delay

Configuring the limitation of bandwidth using class 1 delay. In this we have to mention the delay pool. Delay pools allows you to limit the traffic for clients.

syntax :

acl test src single_ipaddress (or) network_address
delay_pools total_poolcount
delay_class pool class_type
delay_parameters pool aggregate

Open the config file located in /etc/squid/

[root@linuxhelp~]# vim /etc/squid/squid.config

Add the following lines into it.

acl test src 192.168.5.219 192.168.5.63    192.168.7.219
delay_pools 1
delay_class 1 1
delay_parameters 1 8000/8000
delay_access 1 allow test

Explanations

• Mention the source acl name as “ test” , entered the IP addresses.
• Mention “ delay_pools “ and next 1 indicates,only one pool is to be created.
• Mention “ delay_class” . Here, the first 1 indicates pool count order and the second 1 indicates the class type.
• Mention “ delay_parameters” and next 1 indicates pool count order and next is the maximum allowable bandwidth usage(64kbps) for the IP’ s comes under the acl name test.
• Mention “ delay_access” and 1 is the pool count order and next is “ allow test” .

Calculation to get the aggregate value

For 64kbps = (64/8)*1000 = 8000

Restart the Squid services

[root@linuxhelp ~]# service squid reload

In the below snap, you can see the download takes much time

Class 2 type delay

Now Configure the limitation of bandwidth using class 2 delay.

syntax
acl test src network_address
delay_pools total_poolcount
delay_class pool class_type
delay_parameters pool aggregate individual

Open the config file located in /etc/squid/

[root@linuxhelp~]# vim /etc/squid/squid.config

Add the following lines into the config file.

acl test sec 192.168.5.0/24
delay_pools 1
delay_class 1 2 
delay_parameters 1 256000/256000 64000/64000
delay_access 1 allow test

Explanation

• Mention the source acl name as “ test” , entered the IP addresses.
• Mention the “ delay_pools “ and next 1 indicates,only one pool is to be created.
• Mention the “ delay_class” .Here the first 1 indicates pool count order and the 2 indicates the class type 2.
• Mentioned “ delay_parameters” and next 1 indicates pool count order and next is the maximum allowable overall bandwidth (2Mbps) for the 192.168.5.0/24 network. The next(512kbps) is the maximum allowable bandwidth for individual IP comes under the network.

Restart the Squid services

[root@linuxhelp ~]# service squid reload

Open the browser and start the download. You can see that the download speed is limited as per the rule mentioned.