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I am seeing a lot of posts that suggest that peer discovery isn't possible on private networks. Here is one:

Automatic peer discovery in a private blockchain

And another (less clear on this point):

Peer discovery not working on private network

So that raises a few questions:

1) Is that actually true?

2) Is it true with Parity as well as geth?

3) If (1) is true, then does anyone know how Expanse, etc. handle peer discovery?

Thank you.

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  • Peer discovery is possible in private networks unless you disable it. Expanse is not a private network.
    – q9f
    May 30, 2017 at 8:51
  • Are you sure? This post (and others) suggest otherwise about peer discovery: ethereum.stackexchange.com/questions/8712/…
    – stone.212
    May 30, 2017 at 18:12
  • Yes, but peer discovery is still possible. However, Expanse is not a private network. Ropsten, Kovan, Rinkeby are also no private networks.
    – q9f
    May 31, 2017 at 7:38
  • You said "Yes, but peer discovery is still possible." Can you explain how? That is precisely my question. Regarding whether Expanse is "private" or not, I can see some debate since there are two known definitions of "private" for an ethereum blockchain, only one of them means "private and not public." And since I want peer discovery it is obvious which one I am using. But anyway that is beside the point of the question. It sounds like you have an answer to my question. Could you share it please?
    – stone.212
    May 31, 2017 at 23:47

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