I have the following scenario:
I have an ASA that has 2 connections to the Internet (through different ISPs). The ASA has a different public IP address per interface (belonging to each ISP).
I have a Server (on the internal side of the ASA) that receives connections on port 3389.
The ASA is configured so that when internal connections come on each of its public IP addresses, to redirect the connection to the internal server if its received on port 3389.
The problem is the following:
I want that if the primary Internet connection fails, the remote offices can still access the server using the secondary Internet connection (meaning via the other public IP adress) without having to manually have the offices changing the IP address that they must use to reach the server.
Right now, the remote offices are accessing the server by IP address because we wanted to load-balance the traffic and have 4 remote offices to send the traffic via the primary Internet connection and the other 4 remote offices sending the traffic via the secondary Internet connection.
The question is:
How do I accomplish load balancing the traffic that comes from the remote offices and still accomplish to have redundancy in case one link fails to use the other?
I hope someone could help me with this.