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Another way you can limit access to sshd on a GNU/Linux system at the socket level with a built-in (assuming init is systemd 235+ and kernel 4.11+) is by utilizing systemd with cgroup/eBPF access lists Modify the base sshd systemd stanza sudo systemctl edit sshd Append the sshd [Service] stanza to your liking [Service] #requires systemd 235+ and kernel 4.11+...


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