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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This isn't generally done with security scanners unless you're running hundreds of nodes. Use iptables rules with inclusive rules only to block ports. Keep your software inventoried for the rest, or some sort of basic configuration management.
If you don't have these basics, what good is a scanner going to do for you?
Yeah, I agree. Not knowing what ports might be open on a single egress shouldn't happen.