Cannot Update CIS, OpenDNS?

I’ve installed Comodo a 3 different machines inside my network. The network runs through OpenDNS which filters malware/porn/streaming/social-media sites. None of the machines are able to reach the update servers, they all stop at 30%.

I’ve whitelisted comodo.com in the OpenDNS settings. Are there firewall settings I’m missing? Any ideas?

you have to wait at 30% for a while, especially if the server is busy. Let it sit for 10 minutes and see if it is done then.