Lighthouse clients as of v4.5.0, are able to to utilize a faster protocol than tcp, a protocol running on udp, called quic that benchmarks better in latency / bandwidth.
To enable this intra-lighthouse feature and gain the advantages you would need to allow port 9001/udp via the ufw rules you have in fpm-package-builder/utils/ethereumonarm-monitoring-extras/sources/usr/lib/ethereumonarm/user.rules
https://lighthouse-blog.sigmaprime.io/Quic.html and https://github.com/sigp/lighthouse/releases/tag/v4.5.0
Lighthouse clients as of v4.5.0, are able to to utilize a faster protocol than tcp, a protocol running on udp, called quic that benchmarks better in latency / bandwidth.
To enable this intra-lighthouse feature and gain the advantages you would need to allow port 9001/udp via the ufw rules you have in fpm-package-builder/utils/ethereumonarm-monitoring-extras/sources/usr/lib/ethereumonarm/user.rules
Cheers =)