Hello,
I wrote
deb https://packages.graylog2.org/repo/debian/ stable 6.0
in /etc/apt/sources.list.d/graylog.list as the documentation states.
When I run apt update I can see it tries to reach https://graylog-package-repository.s3.eu-west-1.amazonaws.com/ which is blocked in my environment because I only allowed graylog2.org.
W: Failed to fetch https://packages.graylog2.org/repo/debian/dists/stable/InRelease Invalid response from proxy: HTTP/1.1 407 Proxy Authorization Required
Is https://packages.graylog2.org/repo/debian/ still the correct url?