I only just now saw this post, the last month i have already been going all out to learn everything that i need for my Security+ (then CySec+) i have a 30hr video course im part way thorugh, and ive set up a few VMs with various servers like OWASP Security Shepherd and Dam Vunurable Web App for some more hands on experience as well as testing on my personal production Nextcloud and Jellyfin servers and ive been having alot of fun with it all, i think im pretty solid with DHCP and subnetting already through my home networking adventures. I will look into each of those other Certs and each thing you mention to learn thank you! Ive been deep into various Linux systems since about 2008 and im hoping to leverage that as much as i can(although its left me with a lack of modern Windows experience).

Thank you so much for all the tips! I feel some good things coming as im getting into this as work.

There are several problem with this including total lack of SSL without the proper cert for that other domain, also Lemmy.ml’s IP seems to be running a reverse proxy so the internal IP that we would want to connect to is not visible to the world this is common for web security, the owners must set allowed domains and ports in their config file.

If none of that was a problem Lemmy itself does not do well with changing domains, as highlighted here: https://lemmy.nrd.li/comment/190200

Well that sounds like my dream job, unfortunately this issue in particular is more of a Lemmy problem, not a DNS problem. See: https://lemmy.nrd.li/comment/190200 for the explanation of why you cant just transfer domains with Lemmy.