webperson

Thanks Peter, I was able to locate documentation on the WP-Rocket site about this IP address. It’s linked to the “Remove Unused CSS” feature of WP-Rocket:

Basic requirements for the feature to work
…
The following IP has to be allow listed by your server, firewall, or security plugin :
135.125.83.227
…
If you are using Wordfence, activate Learning Mode as described here.

I’m unfamiliar with the particular implementation of Learning Mode, but is it possible this IP became whitelisted through learning mode and now Wordfence simply restores it of its own accord? I’ve reached the point where I’m more interested in who is adding it, not why, to ensure it doesn’t create any potential security issues. Thanks again.

Thanks for your reply, I appreciate it. That completely explains what I’m seeing. I’m guessing a fair number of sites use both, I’m surprised I wasn’t able to google any documentation about it. Now I know!

I’m seeing this as well on my site: 135.125.83.227 cannot be removed, and maps to Paris.