pub fn setup_firewall(config: &Config) -> Result<(), Box<dyn Error>>Expand description
Sets up the firewall with basic rules and any custom rules specified in the configuration.
This function configures either UFW (for Ubuntu) or firewalld (for CentOS/Fedora) with default deny incoming, allow outgoing policy, and opens ports for SSH and any custom rules.
§Arguments
config- A reference to theConfigstruct containing firewall configuration and Linux distribution information
§Returns
Returns Ok(()) if the firewall is set up successfully, or an error if setup fails.