Destination Server failed to connect

[Endurance]

Hello,

I've a problem to setup a Snapshot Replication to an other (external) DS.
The Setup can connect to the other DS, because it asks for MFA Code. Port 5566 is on both Sides open.
What is missing or wrong? (I've also tried it with an other destination, also external, but other location, which has no MFA, same error, and I also tried it with disabled Firewall on Router, same error, and the same if i disable encyption in the Setup)

Connection to DS is working, otherwis I wouldn't get the this:

After 10 sec:

Destination:

Source (I'm not shure if this is needed, but just to be shure)

 

[Endurance]

ah got it:
Server Name bust be the external name or IP...

 

[Gerard]

ah got it:
Server Name bust be the external name or IP...
View attachment 11536

What were you previously using/trying?

 

[Rusty]

Source (I'm not shure if this is needed, but just to be shure)

Yes, it's needed. This is a 2-way operation