AD Authentication For a VS in LTM

The following irule allow you to redirect to home page and insert username as HTTP Header:

when ACCESS_ACL_ALLOWED {
    if { [HTTP::uri] eq "/" } {
        ACCESS::respond 302 noserver Location "/homepage/"
        return
    } elseif {![info exists APMusername]} {
        set APMusername [ACCESS::session data get session.logon.last.username]
    }
    HTTP::header insert "USER" APMusername
}