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vatson112 ,

There are also some kernel settings that you may find useful. Currently I am on the mobile and cannot remember the names. Text me if you need help

Network:

Enable rp and arp filter

Disable IP forwarding if you don’t use docker

Disable tcp timestamp

Disable icmp broadcast

Enable syncookies

Enable source route checking

Other:

Enable hard and soft link protection (it is may broke your system, use carefully)

Enable kptr restrict

Disable kexec

Disable sysrq

Enable randomize virtual memory address

Disable JIT for ebpf programms

Disable loading drivers via modprobe in live kernel.

Also check which hardware mitigations is disabled in your kernel. (Spectre, meltdawn) You may enable KASL

Also use selinux or apparmor. I prefer Selinux.

Enable auditd and configure it for auditing actions that your find useful.

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