Hello,

After ZBXNEXT-3523, I have next circumstance:

1. Discovery Rule connections, which discover {#IP}:{#PORT} and some general macros with info to such connection
2. Discovery Rule proxypass, which discover {#PROXYPASS_DSTIP}:{#PROXYPASS_DSTPORT} and very specific proxypass information
3. {#IP}:{#PORT} could be discovered on ProxyPass discovery Rule or in another like Workers discoveryRule

So, I would like to add triggers to ProxyPass / Worker /.... discovery Rules and use net.tcp.port[{#PROXYPASS_DSTIP},{PROXYPASS_DSTPORT}].last(0)=0 as trigger condition. It would match with the item created at Rule Discovery Connections "net.tcp.port[{#IP},{#PORT}]"

But you can't create a prototype trigger without its item prototype. At doc you can read about it is not posible to create a prototype trigger which depends on another prototype trigger outside the discovery rule.

Thank you very much, and merge with ZBXNEXT-3523 if you see appropriate