How to figure out Number of nodes on custom BTC-based Blockchain?

[spannbeton]

Hello,

We have a custom Blockchain based on the original BTC one with some tweaks. Now how can I get the information how many nodes are currently supporting the network?

[achow101]

You can't. The best you can do is to make a crawler to try to figure out what nodes are accepting incoming connections. You can't know about the nodes that only have outbound connections though.

[spannbeton]

Thanks for the reply.

Then how would I set up such a crawler?