A firewall is a network security device (virtual or physical) that monitors inbound and outbound network traffic and allow/deny based on predefined security rules
By default firewall blocks traffic (both inbound & outbound)
To allow traffic, we need to explicitly add rules (application rule, network rule, NAT rule)
About Azure Firewall
Azure Firewall is a managed, cloud-based Firewall-as-a-Service (FWaaS)
A cloud native, intelligent network security service
It protects Azure virtual network resources
A next-generation security solution to digital assets
Why To Use Azure Firewall?
Fully stateful Firewall-as-a-Service
Built-in high availability and availability zones support
Unrestricted cloud scalability
Easy to set up and maintain
FQDN tags and FQDN in network rules
Deployment without public IP address in Forced Tunnel Mode
Threat intelligence–based filtering, real-time protection based on threat intelligence
Inspect traffic in real time for malicious activities