We have web sites (Drupal 7.59) that are also behind a proxy, and no longer receive updates from drupal.org.
Tried all the solutions mentioned by others (example: emptying cash tables etc.) and and couldn’t find a fix.
Our sys admins have done the below changes and still can’t get it to work.
Can someone please let us know what we are missing? What we have found out was, every time we run Drupal updates it goes to new IP addresses as mentioned below.
Firewall = Palo Alto PA820: Security Policy in place for the following IP addresses (these IPs seems to be changing with every request):
Have also added *.drupal.org to the firewall url whitelist.
Web Proxy = Forcepoint Appliance: No SSL Decryption and scanning exceptions are is in place for *.drupal.org
Please let us know what we are missing.