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Basic DoS Protection
Before We Get Started
You should be doing this at the end of your MPOS install.
Firstly we're going to install some programs to deal with various Authentication Failures, and ban people appropriately. You should research both of these, Because there are a lot of beneficial features.
sudo apt-get update sudo apt-get install denyhosts sudo apt-get install fail2ban
Leave the settings as default unless you've changed your SSH port, Then you need to Google how to configure these programs.
sudo service denyhosts restart sudo service fail2ban restart
Basic DoS Protection With IPTables.
Interactive Firewall Installation: SecureIPTables