Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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Does the IPMI or KVM go on a private network of some sort? Surely you wouldn't want to expose that to the internet.
Usually yes. That's something you might want to discuss with the datacenter what they have to offer that way, some will give you a VPN to be able to reach it. But I don't have experience with that, my current servers came with IPMI and I can download a Java thing from OVH to connect to it.
Usually you define a VLAN dedicated to your IPMI devices, only accessible through an access-controlled way (usually, VPN served by the firewall but don't do that if you're virtualizing the firewall for obvious reasons). The DC might offer a VPN of their own specifically for this purpose, or you can pay them for more space to install a physical firewall but that's a more significant investment.
Ultimately best practices say not to expose the IPMI to the internet, but if you really have no choice and your thing is up to date then you only need to fear 0-days and brute force attacks, the login pages are usually pretty secure since access is equivalent to physical access. You will attract a lot of parasite traffic probing for flaws though.