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I have been hosting my bitcion node in a simple Kuberenetes setup (without istio). I recently learnt about istio https://istio.io/ and want to use it for hosting my bitcoin node.

However, I am not sure about the egress values that need to be configured for the bitcoin node to discover and communicate to other peers. What's the correct way of istio egress configuration for bitcoind? More specifically, what are the hosts that I should allow bitcoind to communicate to?

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To operate, Bitcoin Core needs to:

  1. make DNS queries to a number of public domains in order to find peers to connect to, a full list of these is in chainparams.cpp
  2. make arbitrary outgoing connections on TCP port 8333 on IPv4, IPv6, or both
  3. optionally accept incoming connections on TCP port 8333

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