I can't comment about the topicality at Network Engineering except to state what its moderator already told you:
> OK. Unfortunately, questions about protocols above OSI layer-4 are off-topic here. You should ask questions about things like DNS and web stuff on Server Fault. – Ron Maupin Feb 19 at 15:51
You're trying to do something at Layer 7, which they simply don't deal with at all.
As for us, questions about Juniper hardware and JunOS are welcome at SF regardless of what OSI layer you are working at.