As a Network Security Engineer, my current role revolves around providing comprehensive support in network security, optimizing firewall performance, and ensuring seamless VPN connectivity within the Cisco security environment. With expertise across various Cisco ASA and Firepower platforms, including Firepower 1000, 2100, 4100, and 9300 chassis, I excel in troubleshooting complex issues and managing security profiles such as Application Filtering, URL Filtering, and IPS Policy for Cisco Firepower.My capabilities extend to device maintenance, encompassing software upgrades, device replacements, and resolution of FTD/Firepower device registration issues. Utilizing packet tracer and capturing tools, I analyze packet forwarding issues on ASA and Firepower, employing Wireshark captures for diagnosing connectivity problems. Additionally, I am proficient in configuring ASA and FTD in HA pairs, troubleshooting failover-related issues, and optimizing resource utilization for optimal performance.With a keen eye for system maintenance, I troubleshoot syslog, NTP, and SNMP-related issues, ensuring system stability. My skills also include adeptly migrating different firewalls and troubleshooting site-to-site VPN-related issues. I possess a strong knowledge base in Intrusion Detection Systems (IDS), Intrusion Prevention Systems (IPS), and DDoS attack mitigation techniques.In essence, my role is defined by handling challenges, contributing to providing network security, enhancing firewall performance, and maintaining robust VPN connectivity.