CentOS has plenty of TUIs available from the official CentOS repository. For instance, system-config-network-tui helps you configure the CentOS network. This powerful Python script saves you the burden of editing numerous files to modify your network interfaces, routes, and DNS information. Similarly, system-config-firewall-tui helps you configure your firewall. It offers basic options to just allow incoming services, such as DNS and FTP, and more advanced options to fine-tune the iptables rules, such as configuring trusted interfaces and masquerading.