Value that occasionally enters HTTP_X_FORWARDED_FOR

Asked 2 months ago, Updated 2 months ago, 2 views

Obtain the client ip address via the AWS load balancer using the following methods:

    $ip =explode(',',',$ips)[0];

This $ip has a 99% chance of getting the correct value, but a little less than 1% chance of getting the following format.

// x is all numeric, (6 digits) half-width space (ip address)

Six digits do not seem to have any particular regularity, some starting with 00... and some starting with 90... (if I may say so, many starting with 0... and others starting with 9...)
Also, the ip address at this time is a private address like

If anyone knows what the situation is like, could you please let me know?
Also, what is this six-digit number?
Can I get the client's ip address at this time?
Thank you for your cooperation.

php aws

2022-09-30 14:01

1 Answers
If X-Forwarded-For is already configured, then X-Forwarded-For has xxxxxxxx because that is the value that precedes the comma delimiter.
It says you can't trust this, so you might want to look at the last value.

2022-09-30 14:01

If you have any answers or tips

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