SQL Server Always on 可用性组防火墙要求

端口要求

Port	number	Between	Reason
5022	TCP	Nodes	AlwaysOn
1433	TCP	Nodes	SQL
3343	UDP	Nodes	Cluster
137	UDP	Nodes	DNS
135	TCP/UDP	Nodes	and
49152	through	65535	TCP/UDP
445	Nodes	SMB	communication
139	Nodes	NetBIOS	communication
464	Nodes	and	domain
1433	Network	and	VPN
6789	DNN	listener	Port

DNN listener有版本限制要求：

SQL Server starting with either SQL Server 2019 CU8 and later, SQL Server 2017 CU25 and later, or SQL Server 2016 SP3 and later on Windows Server 2016 and later.

VNN

azure VNN 配置要有load balance