VPS Guide: Your Go-To for VPS, Ubuntu & Command Line Success

Install UFW with Pre-Up Rules on Ubuntu

Category: VPS Setup

Add pre-up rules to UFW on Ubuntu for custom iptables—install with

apt install ufw

then edit /etc/ufw/before rules with

nano /etc/ufw/before.rules

adding before *filter:

*nat\n:PREROUTING ACCEPT [0:0]\n-A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080\nCOMMIT

Allow port 8080 with

ufw allow 8080

enable with

ufw enable

This redirects port 80 to 8080—test with

curl localhost:8080

after starting a service (e g Apache) On Vultr this customizes MySQL or phpMyAdmin access—verify with

iptables -t nat -L

ensuring uptime with flexible port mapping