…ess (nesk)This PR was squashed before being merged into the 2.7 branch (closes#19666).Discussion----------Verify explicitly that the request IP is a valid IPv4 address| Q             | A| ------------- | ---| Branch?       | 2.7| Bug fix?      | yes| New feature?  | no| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets | -| License       | MIT| Doc PR        | -Take the following base code (the array is based on [CloudFlare IP Ranges](https://www.cloudflare.com/ips/)):```phpuse Symfony\Component\HttpFoundation\IpUtils;$ips = [   "103.21.244.0/22",   "103.22.200.0/22",   "103.31.4.0/22",   "104.16.0.0/12",   "108.162.192.0/18",   "131.0.72.0/22",   "141.101.64.0/18",   "162.158.0.0/15",   "172.64.0.0/13",   "173.245.48.0/20",   "188.114.96.0/20",   "190.93.240.0/20",   "197.234.240.0/22",   "198.41.128.0/17",   "199.27.128.0/21",   "2400:cb00::/32",   "2405:8100::/32",   "2405:b500::/32",   "2606:4700::/32",   "2803:f800::/32",   "2c0f:f248::/32",   "2a06:98c0::/29",];```Before this PR, the following code would have returned `true` instead of the expected `false` value:```phpIpUtils::checkIp('blablabla', $ips);```This due to the `ip2long` function returning `false` for an invalid IP address, thus returning `"00000000000000000000000000000000"` with the following code:```phpsprintf('%032b', ip2long('blablabla'));```To fix this I simply check if the `$requestIp` variable contains a valid IP address.Commits-------17e418c Verify explicitly that the request IP is a valid IPv4 address