always remember

Nothing is foolproof to a sufficiently talented fool... Make something
idiot proof, and the world will simply make a bigger idiot.

F5 BigIP LTM – iRule Accept Only UserAgent to Hostname

The following code snippet assumes you have a wildcard virtual host within the F5 LTM device, and that you wish to only allow traffic into that virtual host if a specific user agent string is matched and that the hostname is matched.

    if {{ [class match [HTTP::header "User-Agent"] = "Browser 2.1.0"] } and { ([string tolower [HTTP::host]] starts_with "") }} {
    } else {

It should be modified to suit your specific requirements.

dave / April 14, 2020 / Code, F5 BigIP