How can EC2 Instance in Private Subnet communicate with Gmail SMTP without NAT Gateway on firewall applied environment?

Question

How can EC2 Instance in Private Subnet communicate with Gmail SMTP without NAT Gateway on firewall applied environment?
I can't allow Gmail SMTP Domain's IP Address because the IP is changed.
Also I should construct my environment without NAT Gateway because of NAT Gateway Price.

Answer

You could use an egress-only IPv6 internet gateway (no cost) and connect to Gmail SMTP via IPv6.  A quick google of "gmail smtp ipv6" indicates that IPv6 is supported but has problems in some situations so I'm not sure if this will suit you.

How can EC2 Instance in Private Subnet communicate with Gmail SMTP without NAT Gateway on firewall applied environment?

Conteúdo relevante