How to set Apache access to port 8081

How to set Apache access to port 8081
Units with a network of telecommunications, more out of an IP address to do the server, but ports 80 and 8080 are sealed no way to get 8081 ports. But access to the domain name must be: 8081 to be able to access, want to ask you how to configure Apache forwarding without adding 8081 Direct input domain name can be accessed?
------to solve the idea----------------------
No
Originally access to add the port number, only when the port number is 80 can be the default (you do not write not equal to the network data stream does not write)
Since 80 is not available, it is impossible to go through 80 to 8081.
But you can rent a space on the public Internet and go through that space to your 8081.

Since it is the unit, all the money to let the telecommunications unblock the blockade just. In fact, their overbearing approach is just to make themselves less risky

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