As an experienced Network Administrator with extensive experience in managing Linux servers, I can assist you in configuring your server to block and allow specific API calls effectively. I am proficient in configuring and managing server firewall tools such as iptables, UFW, and Firewalld to secure your server and control access to various API types, including REST, SOAP, and GraphQL. Whether it's setting up custom firewall rules to filter specific API traffic or configuring access controls based on IP, headers, or query parameters, I will ensure that your server’s security is robust and your API calls are properly managed. I also have a strong background in troubleshooting and resolving network issues, ensuring seamless API communication. Let’s discuss your exact needs so I can implement a secure and efficient solution tailored to your infrastructure.