📄️ Codeforces Firewall Exception
When the firewall is blocking all the internet connectivity, setting an exception to Codeforces would require many exceptions for getting the site to work properly due to the fact that it makes requests to several servers on the internet. Also, allowing Codeforces itself will allow contestants to access in-website blogs, editorials, previous user submissions, etc.
📄️ OmegaUP Firewall Exception
To set up the huronOS firewall to open the web connectivity with the OmegaUP platform, it is required to open several websites for OmegaUP to work correctly. OmegaUP does not have a feature to isolate your contest from the rest of the platform as Codeforces does, so, beware as allowing this platform will let the users to also access their private files, such as previous submissions.