Category: Ubuntu

https://www.linode.com/docs/email/postfix/troubleshooting-problems-with-postfix-dovecot-and-mysql/

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First run To find out where certbot is installed to. Or command -v certbot if you prefer. Then run head /usr/bin/certbot and note what version of Python it’s using: In my case, it was using Python 3. I noticed from my pip output it was trying …

How to install Certbot plugins? Read More »

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Running multiple OpenVPN instances (multi port)

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https://certbot.eff.org/lets-encrypt/ubuntuxenial-apache Generate wildcard certificate

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This is a great guide to iptables: An In-Depth Guide to iptables, the Linux Firewall

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http://www.oreilly.com/openbook/linag2/book/ch11.html

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http://billauer.co.il/ipmasq-html.html

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https://www.howtogeek.com/177621/the-beginners-guide-to-iptables-the-linux-firewall/

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