Fortiweb masked subdomain filter

Question

Is there any way to redirect masked subdomains to correct server in Fortiweb? For example, i know that subdomain will be masked like server_name "~^(?<subdomain>[A-Za-z][0-9]{2}([A-Za-z][0-9]){2})\.domain\.com$ and i want to redirect it to correct server. Now we just block this kind of subdomains in WAF.