Novel tools and techniques are provided for implementing firewall functionalities, and, more particularly, to methods, systems, and apparatuses for implementing high availability (“HA”) web application firewall (“WAF”) functionalities. In various embodiments, a first computing system might monitor network communications between a client and a server providing access to software applications, and might determine whether latency has been introduced as a result of at least one first WAF container having been launched and whether any introduced latency exceeds a predetermined threshold, each first WAF container being tuned to a corresponding software application and protecting the software application from network attacks. Based on a determination that latency has been introduced and based on a determination that the introduced latency exceeds the predetermined threshold, one or more second WAF containers may be launched, each being tuned to the corresponding software application. Subsequently, any unused or underutilized WAF containers may be decommissioned or deleted.