Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
I have only my hostname "genius" in my /etc/hostname file - I believe this is correct for ubuntu?
SMTP; 550 Access denied - Invalid HELO name
root@genius:~# hostname genius root@genius:~# hostname --fqdn genius.bowens.co.za.
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