Ah, today I'd like to share with you a super interesting thing, that is to detect whether the ip is a proxy ip (check whether the ip address is legal). We all know that some criminals on the Internet will use proxy ip to do some bad things, so we have to learn how to detect ip is not a proxy ip, so that we can be more secure online ah!

Detect if ip is a proxy ip

First of all, we have to know, proxy ip is like a "door to someone else's house", it will cover the real ip address, so you see is another false address. So, what we have to do is to look out from this "door" to see if it is hiding something.

In fact, it is not difficult to detect whether an ip is a proxy ip or not, as long as we use some simple code can be easily done. For example, we can visit some websites to check the ip address to see if it is labeled as a proxy ip. In addition, we can also use some online tools, such as ip138, ipapi, etc., to query the information of the ip, to see if it is through a proxy.

Verify that the ip address is legitimate

However, it is important to note that when we are detecting an ip address, we also have to make sure that the ip address is legitimate. After all, there are times when we may enter some messy things, resulting in inaccurate detection results. So, we have to check whether the ip address is legal or not before testing whether it is a proxy ip or not.

In fact, it is very simple to verify whether an ip address is legal or not, we just need to use some regular expressions to match the format of the ip address, we can easily determine whether it is legal or not. For example, a legal ipv4 address should be composed of four segments of numbers, each segment of the value of the range of 0 to 255, and separated by a dot. A legal ipv6 address is a bit more complicated, it is composed of 8 hexadecimal numbers separated by colons. As long as we use the correct regular expression, we can easily determine whether the ip address is legal or not.

We have to remember that when we use the code, we should pay attention to protect our private information, do not just use some unknown sources of code, so as not to cause information leakage. In addition, we should also be more careful when detecting ip addresses, do not give the bad guys the opportunity to leave. I hope we can all swim in the Internet safe and happy ah!