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docs/_developers/dns-discovery-setup.md
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@ -3,7 +3,7 @@ title: DNS Discovery Setup Guide
sort_key: C sort_key: C
--- ---
This document explains how to set up an [EIP 1459][dns-eip] node list using the cmd/devp2p This document explains how to set up an [EIP 1459][dns-eip] node list using the devp2p
developer tool. The focus of this guide is creating a public list for the Ethereum mainnet developer tool. The focus of this guide is creating a public list for the Ethereum mainnet
and public testnets, but you may also find this helpful if you want to set up DNS-based and public testnets, but you may also find this helpful if you want to set up DNS-based
discovery for a private network. discovery for a private network.
@ -30,8 +30,8 @@ go get -u github.com/ethereum/go-ethereum/cmd/ethkey
### Crawling the v4 DHT ### Crawling the v4 DHT
Our first step is to compile a list of all reachable nodes. The DHT crawler in cmd/devp2p Our first step is to compile a list of all reachable nodes. The DHT crawler in cmd/devp2p
is a batch process which runs for a set amount of time. You should set up this command to is a batch process which runs for a set amount of time. You should should schedule this command
run at a regular interval. To create a node list, run to run at a regular interval. To create a node list, run
```shell ```shell
devp2p discv4 crawl -timeout 30m all-nodes.json devp2p discv4 crawl -timeout 30m all-nodes.json
@ -68,13 +68,13 @@ The following filter flags are available:
* `-eth-network ( mainnet | ropsten | rinkeby | goerli )` selects an Ethereum network. * `-eth-network ( mainnet | ropsten | rinkeby | goerli )` selects an Ethereum network.
* `-les-server` selects LES server nodes. * `-les-server` selects LES server nodes.
* `-ip <mask>` restricts nodes to the given IP range. * `-ip <mask>` restricts nodes to the given IP range.
* `-min-age <duration>` restricts the result set to nodes which have been live for the * `-min-age <duration>` restricts the result to nodes which have been live for the
given duration. given duration.
### Creating DNS trees ### Creating DNS trees
To turn a node list into a DNS node tree, the list needs to be signed. To do this, you To turn a node list into a DNS node tree, the list needs to be signed. To do this, you
need a key pair. To create the key file in the right format, you can use the cmd/ethkey need a key pair. To create the key file in the correct format, you can use the cmd/ethkey
utility. Please choose a good password to encrypt the key on disk. utility. Please choose a good password to encrypt the key on disk.
```shell ```shell