erigontech / erigontech/erigon

Wrong Use of Fallback IP(127.0.0.1) as fromIP in Ping message of Node Discovery Protocol

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Networking
Dominant language
Go
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Description

Our tool finds that a client `'erigon/v2.53.3-e59704fc/linux-amd64/go1.20.10` sends node discovery `Ping` message whose `fromIP` is `127.0.0.1`. But the second `Ping` of it shows the correct public IP. I guess the it is the NAT or the setupPortMapping that trigger the Problem.
![image](https://github.com/ledgerwatch/erigon/assets/72367122/88b0a892-f5da-46e7-8b29-36ce7c1abcdc)

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