egress-policy: audit Is Blocking Outbound UDP 443

[nibanks]

I am having to remove this from any of my actions that makes outbound UDP 443 (QUIC) connections. When this is enabled I get no connectivity. Related: microsoft/msquic#2534 and nibanks/msh3#28.

[nibanks]

This effectively breaks the QUIC and HTTP/3 protocols (for which we are doing active development). So I have to remove usage of this in any jobs that are making outbound requests.

[varunsh-coder]

Thanks @nibanks for reporting. will address it ASAP.

[varunsh-coder]

@nibanks just tested out the fixed int version of harden-runner on fork of msh3 and msquic.

Looks like the UDP request is going through. Can you please verify if this is what is expected?
https://github.com/varunsh-coder/msh3/runs/5605370590?check_suite_focus=true#step:9:22
https://github.com/varunsh-coder/msquic/runs/5605545963?check_suite_focus=true#step:10:31

If this looks as expected, will continue with the release. Thanks!

[nibanks]

Yep. Both look good to me.