Additional Firewall-Cmd Commands

# Basic firewall-cmd setups

sudo firewall-cmd --zone=public --add-port=22/tcp --permanent
sudo firewall-cmd --zone=public --add-port=80/tcp --permanent
sudo firewall-cmd --zone=public --add-port=443/tcp --permanent
sudo firewall-cmd --zone=public --add-port=8080/tcp --permanent
sudo firewall-cmd --zone=public --add-port=10000/tcp --permanent
sudo firewall-cmd --reload

# Query Firewall Settings

firewall-cmd --list-all
firewall-cmd --list-all-zones
firewall-cmd --get-default-zone
firewall-cmd --get-active-zones
firewall-cmd --list-services
firewall-cmd --list-ports
firewall-cmd --zone=public --list-services
firewall-cmd --zone=internal --list-services

# Add Permanently to Public Zone

sudo firewall-cmd --permanent --zone=public --add-service=http --add-service=https sudo firewall-cmd --reload

# Add Temporarily to Internal Zone

firewall-cmd --zone=internal --add-service=ssh
firewall-cmd --zone=internal --add-source=53.52.51.50/16 --permanent
firewall-cmd --zone=internal --add-source=100.99.98.97/16 --permanent
firewall-cmd --zone=public --remove-service=ssh
firewall-cmd --zone=public --remove-port=22/tcp

# Commit Temporary Changes Permanently

firewall-cmd --runtime-to-permanent

# Remove an IP from Allowed IPs

firewall-cmd --zone=internal --remove-source=100.99.98.97/16

# DOCKER FIREWALLD

# Masquerading allows for docker ingress and egress (this is the juicy bit)

firewall-cmd --zone=public --add-masquerade --permanent

# Specifically allow incoming traffic on port 80/443 (nothing new here)

firewall-cmd --zone=public --add-port=80/tcp

firewall-cmd --zone=public --add-port=443/tcp

# Reload firewall to apply permanent rules

firewall-cmd --reload

# docker firewalld 2

# Check what interface docker is using, e.g. 'docker0'

ip link show

# Check available firewalld zones, e.g. 'public'

sudo firewall-cmd --get-active-zones

# Check what zone the docker interface it bound to, most likely 'no zone' yet

sudo firewall-cmd --get-zone-of-interface=docker0

# So add the 'docker0' interface to the 'public' zone. Changes will be visible only after firewalld reload

sudo nmcli connection modify docker0 connection.zone public

# Masquerading allows for docker ingress and egress (this is the juicy bit)

sudo firewall-cmd --zone=public --add-masquerade --permanent

# Optional open required incomming ports (wasn't required in my tests)

sudo firewall-cmd --zone=public --add-port=443/tcp

# Reload firewalld

sudo firewall-cmd --reload

# Reload dockerd

sudo systemctl restart docker