How do I scan for GHOST remotely?

I'm talking about CVE-2015-0235.

I figured there's no Metasploit package for this kind of check yet and I also understood that there's a special VM by Qualys for this test.

Do you guys know of any other possibility of testing this vulnerability from outside the network?

Alternatively, can anyone tell me if there's any way to tell if this vulnerability is effective behind load balancer?