Catégorie : Security

Install linux firewall

UFW Uncomplicated Firewall

Default policy

ufw default deny incoming
ufw default allow outgoing

Initial rules

ufw allow 53
ufw allow http
ufw allow smtp
ufw allow ssh

Enable logging

ufw logging on

To show the rules with numbers

ufw status numbered verbose

You can delete rule with number

ufw delete <rule_number>

Allow transmission traffic

ufw allow in 9092/tcp

Hodapi deny IPs

sudo ufw deny from 90.80.155.240/28
sudo ufw deny from 80.12.48.0/24
sudo ufw deny from 5.23.42.12/30
sudo ufw deny from 195.5.217.72/29
sudo ufw deny from 81.80.36.231
sudo ufw deny from 81.80.36.232
sudo ufw deny from 81.80.36.233
sudo ufw deny from 81.80.36.234
sudo ufw deny from 194.79.189.240/29