Deep and strong understanding of firewall (Layer-2 and Layer-3), Internet proxy, DNS, SSL VPN, multi-factor authentication and IPS technologies 4. Ability to implement and support complex security architectures involving but not limited to the above listed technologies. Occasionally replacing the security system protocol and architecture Strong knowledge in Firewalls like Palo Alto, Cisco ASA, Checkpoint, & Fortinet firewalls in High-availability mode.