Pre-requisite

Before installing App Gateway in your environment/s, there are several requirements that need to be fulfilled before continuing with the installation procedure. Please finds all related information down below

Server Specification

	Guidelines	Example of 3500 users	Remark
Operating System	Ubuntu Server 20.04 Ubuntu Server 22.04 Red Hat Enterprise Linux 8 (Server base Environment)
CPU Cores	4 core as baseline 1 additional core for every 30k users	4
RAM	6 GB as baseline 512 KB per additional user	8
Disk	60 GB	150 GB	For storing recording, an external mounted volume can be use
Network Bandwidth	32 Kbps	109 Mbps

Internet connectivity to these domains & port

*.docker.com (443)
*.docker.io (80 & 443)
*.github.com (80 & 443)
*.safous.com (443)
*.safous.cn (443)
*.githubusercontent.com (443)
sfs.to (80 & 443)
*.ubuntu.com (80 & 443)
*.amazonaws.com (443)
*.bugsnag.com (443)

To ensuring the connectivity to those domains can work properly:

- Enable those domains list on any firewall and WAF or any security service that might block domains
- For the domains with asterisk wildcard (*), please ensure that you have appropriate connectivity to all domains containing it, not just one specific domain.
- Make sure that no proxies that being use to communicate to those domain from the App Gateway, which might leads terminates the TLS connection in between the installed App Gateway server and the destination resource.
- Basically, there shouldn't be any system can manipulate the traffic between the App Gateway and the Safous ZTNA PoP