Hi IgorG.
Thanks for your advice
I saw that threads. But They aren't my case !
My server had 2 ipv4 : 1.1.1.1 and 2.2.2.2 .
My customer have many domains and subdomains in his subscription. Default his IP is 1.1.1.1
My customer have special domain and he want that domain will listen on 1.1.1.1...