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I'm working on a site based on a host with quite strict firewall rules. It won't allow anything running on the site to contact an external server unless its IP address is explicity whitelisted, and I have to send these addresses to the hosting company by email.

Akismet provide a convenient list of their safe IP addresses here, which has allowed me to get that working. However I haven't been able to find an equivalent list of addresses to allow updating of the WordPress core via wp-admin or access to the WordPress plugins directory. (I can still make manual uploads by FTP.)

Does anyone know where to find a whitelist, or can you tell be the IP address(es) of the WordPress core updater and plugin directory?

Thanks

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    With a quick DNS lookup I found 66.155.40.202, 66.155.40.203, 66.155.40.249, 66.155.40.250 not an official source but may be a starting point.
    – gmazzap
    Jul 9, 2015 at 10:36
  • Thanks for those. I've left those with the hosting people, who will make the changes when they see fit. Fingers crossed...
    – Dåve Hall
    Jul 10, 2015 at 9:04
  • Sure would be great to get an official answer from WordPress.org on this. :) Dec 20, 2015 at 5:36

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I would look at finding the IP address of the Wordpress website.

For example, downloading bbpress manually gives me the link https://downloads.wordpress.org/plugin/bbpress.2.5.8.zip which when using ping in command prompt gives me the IP address of

66.155.40.188 (this matches the subdomain of downloads.wordpress.com)

I would whitelist the IPs found by @gmazzap as I found them too, however the download section as a different subdomain could and seems to be a different server.

I expect that when we update through the WP admin, that it essentially sends the link through to this same location.

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