8. WPMU DEV IP Addresses
If you are having difficulty with a WPMU DEV service not working properly for you, it may be that one or more of our IP addresses are being blocked by a firewall at your host, or a firewall feature in a security plugin you may have installed.
To fix that, you can add our IP addresses to an allowed list in your security plugin or your host’s firewall to allow the connection between your server and ours to proceed unimpeded.
Following are the IP addresses we use for all our services. We recommend adding all of them to your allowed list, but you can of course only add those you need.
WPMU DEV site
If you want to add all of the above IP addresses in one go, here’s the full list with no headings so you can just copy/paste it to your allowed list: