What are some examples of firewall configurations?

What are some examples of firewall configurations?

There are several types of firewall configurations. For instance, you can set up a basic rule to allow traffic on specific ports, like HTTP (port 80) and HTTPS (port 443). Would you like to see more detailed examples?

Yes, please provide a detailed example for a web server.

For a web server, you might configure your firewall to allow incoming traffic on ports 80 and 443 while blocking all other ports. Additionally, you can set rules to allow SSH access on port 22 only from specific IP addresses.

What about a configuration for a VPN?

For a VPN, you would typically allow traffic on the port used by your VPN protocol, such as UDP 1194 for OpenVPN. You should also ensure that the firewall allows traffic between the VPN clients and the internal network.

Can you give me a sample configuration file?

Sure! Here's a simple example for a Linux iptables configuration:

# Allow HTTP and HTTPS
-A INPUT -p tcp --dport 80 -j ACCEPT
-A INPUT -p tcp --dport 443 -j ACCEPT

# Allow SSH from specific IP
-A INPUT -p tcp -s YOUR_IP_ADDRESS --dport 22 -j ACCEPT

# Allow VPN
-A INPUT -p udp --dport 1194 -j ACCEPT

# Drop all other traffic
-A INPUT -j DROP

Replace YOUR_IP_ADDRESS with the actual IP you want to allow.