Basic rules for securing ubuntu VPS with ufw

ufw_rules.sh

# default rule
sudo ufw default deny

# allow ssh
sudo ufw allow 22/tcp

# enable firewall
sudo ufw enable

# allow https?
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp

# check status
sudo ufw status


# blocking a port
sudo ufw deny port <port number>

# blocking an IP
sudo ufw deny from <ip address>

# blocking a specific ip address and port
sudo ufw deny from <ipaddress> to port <port number>

# blocking an IP range to specifoc port example
sudo ufw deny from 10.0.0.1/24 to any port 22

# remove rule
sudo ufw delete <rule type> from <ip address> to any port <port number>

## https://help.ubuntu.com/community/UFW
## http://www.howtogeek.com/115116/how-to-configure-ubuntus-built-in-firewall/