The IP address is not displayed correctly in the log

[LongCX]

My ferron config:

* {
    protocols "h1" "h2" "h3"
    log_date_format "%Y/%m/%d %H:%M:%S"
    log_format "[{timestamp}] {client_ip} - {header:User-Agent} \"{method} {path_and_query} {version}\" {status_code} {content_length} \"{header:Referer}\""
}
myapp.com {
    root "/var/www/myapp"
    precompressed
    log "/share/logs_ferron/myapp.access.log"
    error_log "/share/logs_ferron/myapp.error.log"
}

But output log access:

The {client_ip} field displays an incorrect value.
Correct:
14.232.208.159
14.232.208.159
213.209.157.58
217.182.64.155

Wrong:
::ffff:14.232.208.159
::ffff:14.232.208.159
::ffff:213.209.157.58
::ffff:217.182.64.155

Please help me check

[DorianNiemiecSVRJS]

What you have in the access logs are IPv4-mapped IPv6 addresses (like ::ffff:127.0.0.1), while it seems like you have expected IPv4 addresses without the ::ffff: prefix (like 127.0.0.1).

And IPv6 is enabled by default in Ferron...

Perhaps you need a placeholder (instead of {client_ip}) that would be replaced with canonicalized IP address (where IPv4-mapped IPv6 address would be turned into IPv4 address), which Ferron doesn't have yet? I can add support for a placeholder, something like {client_ip_canonical} that does that.

[DorianNiemiecSVRJS]

I didn't change anything in the {client_ip} placeholder, but I added another one ({client_ip_canonical}) that is replaced by the client's IP address, canonicalized from IPv4-mapped IPv6 addresses to IPv4 addresses (so without ::ffff: prefix).

I did the same for the server's IP address placeholder.

I did this in the f846ea1 commit, so the next version of Ferron 2 is going to have the new placeholder.

[LongCX]

I think that if it is IPv4, it should be displayed in the standard IPv4 format rather than being shown as IPv6. Displaying it in the ::ffff: format is not user-friendly in access logs. Thank you for fixing the issue so quickly; I’ve used the latest version and it works very well.