simple host redirect

[root@ve1023:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   if { [HTTP::host] equals "site.com" }{
      HTTP::redirect "http://site.com/portal"
   }
}
}

[root@ve1023:Active] config  curl -I http://172.28.19.79 -H "Host: site.com"
HTTP/1.0 302 Found
Location: http://site.com/portal
Server: BigIP
Connection: Keep-Alive
Content-Length: 0