Asynchronous Replication (no replies)

Hello,

I want to do some replication:

- I have databases on several plants and I want them to synchonize with one single database which is at my working place so I can see what every plant is doing.
- The plants just have dynamic IPs because they belong to different owners so I cannot contact them.
- At my working place I have a static IP adress for my SQL server.

That means that the databases at the plants have to send their data to my working place independently.

Somehow I have the feeling this is different to the mysql concept of replication because the one that gets the data needs to know the IP address of the master. The typical Master->Slave or Master<->Master scenario is not possible for me because I cannot know the corresponding IP addresses. I rather know the slaves IP address I would say.

Am I right? And has anyone an idea to solve this, please?

At the moment the plants are doing backups automatically which are transfered to a ftp server at my working place. There I have to read the backups manually. So I want to skip reading backups and instead my server should be synchronized automatically.

Best regards,
AJ