Do I need a firewall for my fedora 38?
I’m new to Linux, previously been on Windows where I used defender + Windows firewall. Now I’m on fedora which also have its firewall called firewalld. Are those sufficient, or do I need any other solutions for my security?
Uncomplicated Firewall is easy to setup and understand. It blocks traffic and allows it. Install UFW
sudo apt install ufw
My recommended(Chris Titus)
`sudo ufw limit 22/tcp
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw enable`
Is this enough?
This is fedora, I would stick with firewalld.
sudo dnf install firewalld
sudo systemctl enable --now firewalld
sudo firewalld-cmd --add-service --permanent ssh
sudo firewalld-cmd --add-service --permanent https
sudo firewalld-cmd --add-service --permanent http
sudo systemctl restart firewalld
Yes, it is enough. Generally, the default handling of connections on Linux is enough but having
ufwcan’t hurt. Certain developer or server software may not work unless you add UFW exceptions for them. They don’t know how to do this on their own.By default, without a firewall, any program can communicate through any port it wants as long as it can bind that port. Ports that are special or low-numbered (e.g. TCP port 21 is reserved for FTP) require root to be bound. Otherwise, a program can bind any port that isn’t already in use by something else. All incoming connections to a port that isn’t bound will be refused and the information discarded.
Edit: Your router also usually has a firewall that is strong enough for most everyday purposes.