IP address format

[ReneH4]

Can anyone tell me what the format type is of this IP address?

It shows blank in who's online

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2001:1c00:2e0a:de00:4d8f:a3f6:ab14:9207

Reason why I ask is because I am investigating a brute force attack to my domain. It has caused it to go down a few times now.

IP's like these show up a lot, but can they be blocked using .htaccess?

[ecartz]

That's an IPv6 (IPv4 is the 123.45.67.89 form).

[ReneH4]

Any idea why IPv6 addresses do not show in who's online? (1079)

[ecartz]

Who's online only uses IPv4. This was a deliberate choice at some time. https://github.com/CE-PhoenixCart/Phoen ... st.php#L40

You can change it to

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        if (filter_var($ip, FILTER_VALIDATE_IP)) {

That would accept either IPv6 or IPv4. The limitation to IPv4 predates the community edition, so I don't know why it was done originally (I did preserve it when updating because it hadn't reported any problems). Possibly simply because IPv6 used to be rarer and is bigger than IPv4, so saving it in the database was problematic. But we raised that restriction such that it should no longer be an issue.