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nwaku/docs/operators/how-to/configure-domain.md

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Configure a domain name

Note: This page describes configuring a domain name that resolves to your node's IP and is unrelated to DNS discovery, by which a node may discover the listening addresses of other peers using DNS.

It is possible to configure an IPv4 DNS domain name that resolves to the node's public IPv4 address.

wakunode2 --dns4-domain-name=mynode.example.com

This allows for the node's publically announced multiaddrs to use the /dns4 scheme. In addition, nodes with domain name and secure websocket configured, will generate a discoverable ENR containing the /wss multiaddr with /dns4 domain name. This is necessary to verify domain certificates when connecting to this node over secure websocket.