I'm that person that still uses Tripwire on my personal *nix servers. :D
Don't forget that something this simple can save your a**.
I know it isn't advanced, but hopefully this can help someone that finds themselves in a similar pentest situation.
Breaking Through NAT For Meterpreter - https://synfinner.ru/2019/11/04/Breaking-Through-NAT-For-Meterpreter/
Infosec stuff | Global traveller | Food connoisseur | Recovering APT