How to replace the destination IP?

Good day!

There is an old program, which lost the source code.
She was breaking through the old IP address of the server (Access it no more :( )
How can I replace the IP destination address?
That is, the program should break at the, and packages should be sent to
Packets go through the TCP
I tried to use Proxy, but the program does not respond to values in the system and WINHTTP
Proxyfer as well to no avail
A router also could not carry out such. It remains only the idea of using OpenWRT and there trying to find a way to implement it
June 26th 19 at 14:18
1 answer
June 26th 19 at 14:20
On the router, create the VLAN, assign it the address of, and then with the router, dstnat port anywhere.

It is possible for the server to throw virtualIP to the network card and then route the workstation to register on this server
You can open the prog in the debugger, find the address and otkorektirovat.

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