.NET/C# verifies that the IP address is within the IP segment

Little scum · Posted on 6/2/2021 9:44:57 AM

When doing gateway current limiting and blacklisting, we may need to directly set IP segment rules to avoid adding them one by one, and we can directly add IP segments from the private network to the whitelist to verify whether the client belongs to the IP segment.

Use Alibaba Cloud load balancing to block IP access to websites
https://www.itsvse.com/thread-4777-1-1.html

#封整个段即从123.0.0.1 to 123.255.255.254
123.0.0.0/8

#封IP段即从123.45.0.1 to 123.45.255.254
124.45.0.0/16

#封IP段即从123.45.6.1 to 123.45.6.254 are commands
123.45.6.0/24

IP address translation, IP network segment translation, CIDR/Netmask translation:The hyperlink login is visible.

It can convert IP from different formats to unified formats, including IP segment conversion, subnet mask format conversion, and CIDR/Netmask format conversion. Support "." IP address conversion in format, decimal, network segment, network mask format

Code:

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[Source] .NET/C# verifies that the IP address is within the IP segment

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