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This paper introduces the sample code to achieve IP access diversion through Nginx reverse proxy and share it with you. The details are as follows:

It is a common server deployment architecture to achieve shunting through Nginx as a reverse proxy to reduce the load and pressure on the server. This article will share a method of how to divert according to the source IP.

Shunting according to a specific IP

Forward the last segment of the IP address whose last bit is 0 or 2 or 6 to test-01.com for execution, otherwise forward to test-02.com for execution.

Upstream test-01.com {server 192.168.1.100 upstream test-02.com {server 192.168.1.200 upstream test-02.com 8080;} server {listen 80; server_name www.test.com; location / {if ($remote_addr ~ * ^ (. *)\. * [026] $) {proxy_pass break;} proxy_pass http://test-02.com;}}

Forward the first three segments of the IP address 192.168.202.* to test-01.com for execution, otherwise forward to test-02.com for execution.

Upstream test-01.com {server 192.168.1.100 upstream test-02.com {server 192.168.1.200 upstream test-02.com 8080;} server {listen 80; server_name www.test.com; location / {if ($remote_addr ~ * ^ (192)\. (168)\. (202)\. (. *) $) {proxy_pass break;} proxy_pass http://test-02.com;}

Shunting according to the specified range of IP

The last segment of the IP address is forwarded to test-01.com for execution, otherwise it is forwarded to test-02.com for execution.

Upstream test-01.com {server 192.168.1.100 upstream test-02.com {server 192.168.1.200 upstream test-02.com 8080;} server {listen 80; server_name www.test.com; location / {if ($remote_addr ~ * ^ (. *)\. [1100] $) {proxy_pass break;} proxy_pass http://test-02.com;}}

Offload based on forwarded addr

The access at the beginning of the first paragraph of the IP address is forwarded to test-01.com for execution, otherwise forwarded to test-02.com for execution.

Upstream test-01.com {server 192.168.1.100 upstream test-02.com {server 192.168.1.200 upstream test-02.com 8080;} server {listen 80; server_name www.test.com; location / {if ($http_x_forwarded_for ~ * ^ (212)\. (. *) $) {proxy_pass break;} proxy_pass http://test-02.com;}}

The function of if instruction

If instruction: determines whether the value of the expression is true (true), and if so, executes the following curly braces.

Here are some common ways to compare conditional expressions:

Complete comparisons of variables can be done using the = or! = operator partial matching can be expressed using regular expressions of ~ or ~ * to indicate case sensitivity ~ * to indicate case insensitivity (nginx is the same as Nginx)! ~ and! ~ * are inverted operations Check for the existence of a file using the-f or!-f operator to check for the existence of a directory. Use the-d or!-d operator to check for the existence of a file, directory, or symbolic link. Use the-e or!-e operator to check whether a file is executable. Partial matching of regular expressions using the-x or!-x operators can use parentheses, and the matching can be replaced by the $1qq9 variable.

The above is the whole content of this article, I hope it will be helpful to your study, and I also hope that you will support it.

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