I like to open ssh inbound rule only for an ip from another country. I have developer in Vietnam. I like to allow access to my instance for his ip in Vietnam.
His ip is, for example, 192.108.0.14.
So I set inbound rule SSH port 22 for ip address 192.108.0.14/32 But he said can't access.
So now I changed to 0.0.0.0/0. That is not save, I don't like it.
Why I can't allow his ip address to access my EC instance? What is wrong with my inbound rule?