Windows Failover Cluster Ports Requirements
MS-SQL Add node in DR Site to the DC One
Make Sure DC VIP can be configured on the DR Site
Redis Failover Check
Postgresql Failover Check DC And DR Site
PCS Cluster Check if everything working according to the need of the bmc team COAS Capacity Optimization

Active Directories Dependenices for MS-SQL

Oraganitional Unit : Admin Users & SQL Servers
Service Account in SQL Servers sqladmin (Memeber of Domain Admin)
Assign Windows Failover Cluster Role (WFCS) to third sql node security
Add the third node in computer Containerd
Add the third node in windows failover cluster
Add the third node in ms-sql alaways on availability group

For MS-SQL Database

Points to do on high priority
MS-SQL DC AND DR Ports
Windows Failover Cluster Ports

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Application protocol Protocol Ports
Active Directory Web Services (ADWS) TCP 9389
Active Directory Management Gateway Service TCP 9389
Global Catalog TCP 3269
Global Catalog TCP 3268
ICMP No port number
Lightweight Directory Access Protocol (LDAP) Server TCP 389
LDAP Server UDP 389
LDAP SSL TCP 636
IPsec ISAKMP UDP 500
NAT-T UDP 4500
RPC TCP 135
RPC randomly allocated high TCP ports¹ TCP 1024–5000
49152–6553⁵²
SMB TCP 445

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Assign on IP in DR of BD-DB subnet of DC Subnet 155.1.72.x and put it in DR VM For Cross Check if the ip is allowed or not

For Apache bases yum server
port 80 of yum server 155.1.73.40 to allow on dc and dr subnet

Redis Database Failover Check

TSIS Failover Cluster Windows Different subnet :