What you would have to do is setup dynamic DNS on the machines you want to whitelist (you can use duck dns or buy a domain and use cloudflare). From there, it depends how you are whitelisting and if it supports the hostname. For example, if you are using ufw, you can write a bash script that runs every few minutes that grabs the ips by resolving those hostnames and updates the entries.
this post was submitted on 09 Sep 2023
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