Need help with cloudflare-ufw?
Click the “chat” button below for chat support from the developer who created it, or find similar developers for support.

About the developer

271 Stars 75 Forks Apache License 2.0 20 Commits 0 Opened issues


Script to update UFW with Cloudflare IPs

Services available


Need anything else?

Contributors list

# 200,362
14 commits
# 524,786
1 commit
# 128,487
1 commit


Script to update UFW with Cloudflare IPs.


Assuming that you already have ufw installed (now a pre-installed package in most linux distros), firstly ensure that ufw is not enabled;

sudo ufw status verbose

If it's not enabled, the response should be

Status: inactive
but if not, let's disable it;

sudo ufw disable

Clear out any existing rules;

sudo ufw reset

and set the default rules to deny incoming and allow outgoing connections;

sudo ufw default deny incoming

sudo ufw default allow outgoing

It's important at this stage to prevent being accidently being locked out of your system by adding 2 rules, before going further.
Add a localhost rule;

sudo ufw allow from

and also allow SSH access;

sudo ufw allow ssh

Provided those rules were succesfully added, time to enable your firewall;

sudo ufw enable

You will receive a warning that says the "command may disrupt existing ssh connections." We have already set up a firewall rule that allows SSH connections so it should be fine to continue. Respond to the prompt with y.
You can run the

sudo ufw status verbose
command to see the rules that are set.

Install the script

Git clone this repo to your system, and run the bash script in the normal manner;

sudo /your/path/cloudflare-ufw/./

The script will then download Cloudflare's current v4 & v6 IP's, and install them into ufw's configuration. Check that the rules have been successfuly added;

sudo ufw status verbose


Everytime the script is run, it will add any new Cloudflare IP addresses, so consider running the script weekly to ensure that it's kept up to date.
The script can run automatically by using cron;

sudo crontab -e

and add the event;

0 0 * * 1 /your/path/cloudflare-ufw/ > /dev/null 2>&1


If using node-red, simply add

sudo /your/path/cloudflare-ufw/./
to an 'exec node' and inject it every week.

Other UFW commands

Delete a single rule

Firstly get a numbered list of all rules

sudo ufw status numbered

and then delete the rule by number

sudo ufw delete 34

This concept was originally developed by Leow Kah Man.

We use cookies. If you continue to browse the site, you agree to the use of cookies. For more information on our use of cookies please see our Privacy Policy.