Stakers.space

Prerequisites for this Ethereum staking

Staking Node for Ethereum staking, see
options and guides for Staking Node
Access to Staking Node Operating System
Interest in staking

Securying Ubuntu OS

In the matter of security, you must think about the way you are going to connect to / access your node - see the guide below.

Upgrade & update on the latest software and security updates.

$ sudo apt -y update && sudo apt -y upgrade
$ sudo apt dist-upgrade && sudo apt autoremove
$ sudo reboot

You can also create a shell script that will do this either on manual request or a schedule, see Update and Restart Ubuntu server Utility.

Configure the Firewall

Install UFW, configurate deny state for incoming and allow state for outgoing traffic

$ sudo apt install ufw
$ sudo ufw default deny incoming
$ sudo ufw default allow outgoing

Temporary till next step - Enable SSH port for remote access (process only if you are connected through the SSH = you are not connected with a keyboard and monitor right to the node)
```
sudo ufw allow 22/tcp
```
Enable Firewall
```
$ sudo ufw enable
```
Check Firewall Ports
```
sudo ufw numbered
```

Managing the SSH access

SSH allows to connect to the server either from the local or remote network.
If you are going to connect your node locally only (= with monitor and keyboard connected right in the node), you do not need to install SSH or you can simply disable it, if is already installed.

Check, whether `SSH` is installed on the server

which sshd

This command should print directory of the SSH service. If it prints an empty response, SSH is not installed on the server and thus connecting to server over SSH is not possible. If required, SSH can be installed with following command:

sudo apt install openssh-server

With allowed SSH access, you must protect SSH access to your server from attackers. Based on your network confifuration, access may be possible from:

From any network (Your server has public IP)
From a local network only (Your server is behind nat)
From a VPN network the node is assigned to

Even if you have enabled access from a local netowk only (your node is behind NAT), you should still protect your SSH access as a potential attacker may use a compromised device in your local network to access your node. The defense consists in increasing the number of obstacles that must be overcome to access your node.

Modify default SSH port
Configurate SSH keys
Configurate 2FA authentization
Configurate Brute-force & DDoS protection
Additional tips

Before configuring security matters and connecting to your node, take note the basic rule to maintain also the security of the computer(s) you are going to use for connecting to your node (stealing the SSH keys) as well as other devices required for connection (stealing 2FA codes) etc.

Modify default 22 SSH port

As port 22 is default port for SSH connections, it's the first port that a potential attacker tests. Change it to a different free port.
1. Choose any number between 21 and 49151
  Choose a port number for SSH:
2. Check whether the selected port for SSH is not already in use
```
sudo ss -tulpn | grep ':22'
```
  - blank response = port is not in used
  - red text response, the port is already in used. Check availability of a different port number in such case.
3. Change SSH port from default 22 to 22 in the SSH config file
  1. Open sshd_config config file
```
sudo nano /etc/ssh/sshd_config
```
  2. Find mark Port, usually Port 22. The mark specifies currently port used for SSH access.
    
    Rewrite the port value for Port
  3. Press CTRL + X then Y then ENTER to save and exit the config file.
4. Enable the Port 1024 for SSH/TCP connection
```
sudo ufw allow 1024/tcp
```
5. Restart the SSH service to reflect the changes.
```
sudo systemctl restart ssh
```
  After the restart, you will not able to connect through the SSH over port 22 anymore. Be sure you are connecting over the 1024 next time.
6. Disable the default 22 port for SSH/TCP connection
```
sudo ufw deny 22/tcp
```
7. Check your port settings if needed
```
sudo ufw status numbered
```
Configure SSH keys

By default, SSH connections can be made using a combo of username and password. As password is usually somewhat "short" and thus susceptible to brute-force attacks, key loggers attacks and so on. This is why SSH keys significantly enhances the security of the login process.
SSH keys step by step guide.
Configuring 2FA authentization

2FA (2 Factor authentization) comes with additional code you must provide to access your node. You may know 2FA from crypto exchanges. In the same way you can protect loging to your node.
2FA Google Authentication activation guide.
Configuring Brute-force & DDoS protection

To defend against Brute Force and DDoS attacks, one can monitor incoming connections and block IP addresses that repeatedly attempt to log in with incorrect credentials. Installing the Fail2Ban package can assist with this.
Guide to activate Fail2Ban.

Securying remote access tips

Staking node is accessible from public IP:
- If you do not need o connect to your node from remote networks, move your node behind the router that prevents accessing the node.
- If you want to keep this feature, you should still consider move the node behind the router, set VPN on the router, and when connecting to the node, firstly connect to the router VPN and then connect the node from "local" network through its local IP.
Staking node is not accessible from public IP:
- If you need connecting your node from remote networks, you must either set a VPN, such as Tailscale (either on the server itself or any other device in your local network), or buy public IP from your ISP and follow the points for server accessible from the public IP.

If you have SSH installed and running on your server, you must either disable ports for SSH traffic, disable SSH or remove it. If SSH is not installed on your machine, you can skip this step - ssh access is not possible already.

Option 1: Stop and disable the ssh service
```
sudo systemctl stop ssh
sudo systemctl disable ssh
```
If preferred, you can remove the SSH server client from the machine
```
sudo apt remove openssh-server
```
Option 2: Disable traffic on SSH port

Check 22/tcp port for enabled traffic with command
```
sudo ufw status numbered
```
Note: default 22 port could be changed, as well as could not be enabled. If there's any tcp traffic enabled, disable it. Code below is for default SSH port 22.
```
sudo ufw deny 22/tcp
```

Consider installing and setting VPN to hide your public IP

VPN allows the server to access the internet through an intermediary in a form of a VPN server. In such case, your server's IP address (and location) is hidden behind the VPN server IP address. The disadvantage is the potential instability of the VPN server, in terms of connection speed and possible crashes into offline state.

Complete guide to install, configurate and activate Mullvad VPN on Ubuntu server.

Note: If you need to have active Mullvad and Tailscale simultaneously, follow a guide for setting rules for netfilter.

Check / set basic config for your node machine

Check, you are not logged in as root. If so, create a new user with sudo, see section Staking on rented hardware
Check a swap space
```
free -h
```
If there's no swap space created on your node, configurate a swap space.
Check timedatectl service for option to synchronize time
Check current state:
```
timedatectl status
```
- NTP service must be active. If not, run sudo timedatectl set-ntp on
- System clock synchronized must be yes. If not, and you have active VPN client, set a split tunnel for timedatectl service.
Create downloads directory in your machine
```
mkdir ~/downloads
```
This folder will be used for downloading clients

Generate Client Authentication Secret for ethereum

Create a new directory for jwtsecret files
```
sudo mkdir -p /var/lib/jwtsecret
```

Generate the JWT file using the openssl cryptography software library.

openssl rand -hex 32 | sudo tee /var/lib/jwtsecret/ethereum.hex > /dev/null

Check the generated authentication secret
```
$ nano /var/lib/jwtsecret/ethereum.hex
```
Press CTRL + X to exit the config file.

Install and configurate preferred execution client

Installing Nethermind client

Nethermind documentation: https://docs.nethermind.io/

Find the latest stable version of Nethermind on Github
- Find latest Nethermind version at https://github.com/NethermindEth/nethermind/releases
- Write latest stable Nethermind version in format such as 1.29.1-dfea5240:

Download Nethermind version `1.29.1-dfea5240` to your node

cd ~/downloads && curl -LO https://github.com/NethermindEth/nethermind/releases/download/1.29.1/nethermind-1.29.1-dfea5240-linux-x64.zip

Install package for unzipping
```
sudo apt-get install -y unzip
```

Unzip the downloaded file

unzip nethermind-1.29.1-dfea5240-linux-x64 -d nethermind

Copy the client to `/usr/local/bin/`

sudo cp -a nethermind /usr/local/bin/nethermind

Remove downloaded files

cd ~/downloads && rm nethermind-1.29.1-dfea5240-linux-x64.zip && rm -r nethermind

Create a system user and data directory for Nethermind service

Create a user

Service/User name:

sudo useradd --system --no-create-home --shell /bin/false eth-nethermind

Create a folder for Nethermind data on Ethereum chain
Service data directory:
```
sudo mkdir -p /var/lib/ethereum/nethermind
```

Set access permission and ownership for the Nethermind data folder

sudo chown -R eth-nethermind:eth-nethermind /var/lib/ethereum/nethermind

Configurate & Run Nethermind service

Choose ports for communication

Change the default ports below if you are going to stake on more chains simultaneously (e.g. Ethereum and Gnosis at once) on the same machine. If you are going to stake ethereum only, you can keep the default ports. If you are changing the default ports, be sure that the newly selected port is not already in used. A port in used may be checked with following code:
```
ss -tuln | grep ':PORT'
```
- If it returns empty response, the port is free and can be used.
Ports selection
- P2P network (TCP, UDP): (Default port: 30303)
- JSON-RPC interface (TCP): (Default port: 8545)
- Execution endpoint (TCP): (Default port: 8551)
If needed, check JSON RPC server and fundamentals in Nethermind documentation.
Enable port for P2P communication (execution client)

To allow execution client synchronization, there's need to enable P2P traffic to TCP (allows the node to connect to peers) and UDP (allows node discovery) port 30303. It may be done with following UFW setup:
```
$ sudo ufw allow 30303
```

Create configuration file for Nethermind service

Open Nethermind configuration file

sudo nano /etc/systemd/system/eth-nethermind.service

Copy the configuration below into the file. If needed, check flags documentation.

[Unit]
Description=Nethermind Execution Client (Ethereum Mainnet)
After=network.target
Wants=network.target

[Service]
User=eth-nethermind
Group=eth-nethermind
Type=simple
Restart=always
RestartSec=5
WorkingDirectory=/var/lib/ethereum/nethermind
Environment="DOTNET_BUNDLE_EXTRACT_BASE_DIR=/var/lib/ethereum/nethermind"
ExecStart=/usr/local/bin/nethermind/nethermind \
  --config mainnet \
  --datadir /var/lib/ethereum/nethermind \
  --Sync.SnapSync true \
  --Sync.AncientBodiesBarrier 11052984 \
  --Sync.AncientReceiptsBarrier 11052984 \
  --JsonRpc.JwtSecretFile /var/lib/jwtsecret/ethereum.hex \
  --Network.P2PPort 30303 \
  --Network.DiscoveryPort 30303 \
  --JsonRpc.EnginePort 8551 \
  --JsonRpc.Port 8545

[Install]
WantedBy=default.target

Press CTRL + X then Y then ENTER to save and exit the config file.

Start the Nethermind service

sudo systemctl daemon-reload
sudo systemctl start eth-nethermind

Check the service
```
systemctl status eth-nethermind
journalctl -fu eth-nethermind
```
If you see message "Waiting for Forkchoice message from Consensus Layer to set fresh pivot block", you can move on a Consensis Client setup.
Start the service automatically on system startup
```
sudo systemctl enable eth-nethermind
```

Installing Erigon client

Erigon documentation: https://erigon.gitbook.io/erigon

Find the latest stable version of Erigon on Github
- Find latest Erigon version at https://github.com/ledgerwatch/erigon/releases. AMD64 v1/v2 links at Microarchitecture levels.
- Write latest stable Erigon version:

Download Erigon version `2.60.10`

cd ~/downloads && curl -LO https://github.com/erigontech/erigon/releases/download/v2.60.10/erigon_v2.60.10_linux_amd64v2.tar.gz

Verify hash of donwnloaded file
Get hash of downloaded file and compare it with official hashes
```
sha256sum erigon_v2.60.10_linux_amd64v2.tar.gz
```
And check it compare to the provided hash for the file from https://github.com/erigontech/erigon/releases/download/v2.60.10/erigon_v2.60.10_checksums.txt (Note: The link links at 2.60.10 version )

Extract the downloaded package

tar xvf erigon_v2.60.10_linux_amd64v2.tar.gz

Copy extracted Erigon library

sudo cp -a erigon_v2.60.10_linux_amd64v2 /usr/local/bin/erigonlib

Remove downloaded files

cd ~/downloads && rm -r erigon_v2.60.10_linux_amd64v2.tar.gz && rm -r erigon_v2.60.10_linux_amd64v2

Create a system user and data directory for Erigon service

Create a user

Service/User name:

sudo useradd --system --no-create-home --shell /bin/false eth-erigon

Create a folder for Erigon data on ethereum network
Service data directory:
```
sudo mkdir -p /var/lib/ethereum/erigon
```

Set access permission and ownership for the Erigon data folder

sudo chown -R eth-erigon:eth-erigon /var/lib/ethereum/erigon

Configurate & Run Erigon Service

Choose ports for communication

Change the default ports below if you are going to stake on more chains simultaneously (e.g. Ethereum and Gnosis at once) on the same machine. If you are going to stake ethereum only, you can keep the default ports. If you are changing the default ports, be sure that the newly selected port is not already in used. A port in used may be checked with following code:
```
ss -tuln | grep ':PORT'
```
- If it returns empty response, the port is free and can be used.
Ports selection
- P2P network (TCP, UDP): (Default port: 30303)
- JSON-RPC interface (TCP): (Default port: 8545)
- Execution endpoint (TCP): (Default port: 8551)
Enable port for P2P communication (execution client)

To allow execution client synchronization, there's need to enable P2P traffic to TCP (allows the node to connect to peers) and UDP (allows node discovery) port 30303. It may be done with following UFW setup:
```
$ sudo ufw allow 30303
```

Create configuration file for Erigon service

Open configuration file

sudo nano /etc/systemd/system/eth-erigon.service

Copy the configuration below into the file

[Unit]
Description=Erigon Execution Client (Ethereum Mainnet)
After=network.target
Wants=network.target
[Service]
User=eth-erigon
Group=eth-erigon
Type=simple
Restart=always
RestartSec=5
ExecStart=/usr/local/bin/erigonlib/erigon \
  --chain=mainnet \
  --datadir=/var/lib/ethereum/erigon \
  --authrpc.jwtsecret=/var/lib/jwtsecret/ethereum.hex \
#  --externalcl \
  --prune=htcr
#  --private.api.addr= \
#  --prune.r.before=11052984 
[Install]
WantedBy=default.target

Press CTRL + X then Y then ENTER to save and exit the config file.

Start the service

sudo systemctl daemon-reload
sudo systemctl start eth-erigon

Check the service

systemctl status eth-erigon
journalctl -fu eth-erigon

Start the service on system startup
```
sudo systemctl enable eth-erigon
```

Soon

Consensus client

Communication ports selection

Each service on the server needs a custom port for communication. Through ports, consensus client communicates with other peers in the network as well as other services running on the server, such as validator clients. There is an IPv4 and IPv6 variant, depending on the ISP support / preference. Each protocol version needs custom port. If you are not sure what to select, continue with default IPv4 port.

Configurate public IPv4 port for P2P communication with other peers
- Choose P2P communication port:
- Verify availability of selected port 9000
```
ss -tuln | grep ':9000'
```
  If it returns empty response, the port 9000 is free and can be used.
- Enable traffic on the port through UFW
```
$ sudo ufw allow 9000
```
- Disable IPv6 traffic on the port
  - List allowed ports
```
sudo ufw status numbered
```
  - Find order number for V6, see 9000 (V6) and remove it with the following line
```
sudo ufw delete <Number>
```
QUIC IPv4 port
- Choose QUIC IPv4 port:
- Verify availability of selected port 9001
```
ss -tuln | grep ':9001'
```
  If it returns empty response, the port 9001 is free and can be used.
Beacon API port for internal communication
- Choose Beacon API port:
- Verify availability of selected port 5052
```
ss -tuln | grep ':5052'
```
  If it returns empty response, the port 5052 is free and can be used.

Configurate public IPv6 port for P2P communication with other peers
- P2P communication port:
- Verify availability of selected port 9090
```
ss -tuln | grep ':9090'
```
  If it returns empty response, the port 9090 is free and can be used.
- Enable traffic on the port through UFW
```
$ sudo ufw allow 9090
```
- Disable IPv6 traffic on the port
  - List allowed ports
```
sudo ufw status numbered
```
  - Find order number for V6, see 9090 and remove it with the following line
```
sudo ufw delete <Number>
```
QUIC IPv6 port
- Choose QUIC IPv4 port:
- Verify availability of selected port 9091
```
ss -tuln | grep ':9091'
```
  If it returns empty response, the port 9091 is free and can be used.

Install Consensus client

Find the latest stable version of Lighthouse on Github
- Find latest Lighthouse version at https://github.com/sigp/lighthouse/releases
- Write latest stable lighthouse version:
  
  This will update the url links in the guide below.

Download Lighthouse version `5.3.0` to your node

cd ~/downloads && curl -LO https://github.com/sigp/lighthouse/releases/download/v5.3.0/lighthouse-v5.3.0-x86_64-unknown-linux-gnu.tar.gz

Extract downloaded file

$ tar xvf lighthouse-v5.3.0-x86_64-unknown-linux-gnu.tar.gz

Replace old Lighthouse client for new

$ sudo cp ~/downloads/lighthouse /usr/local/bin

Remove downloaded files

$ cd ~/downloads && rm lighthouse-v5.3.0-x86_64-unknown-linux-gnu.tar.gz && rm -r lighthouse

Configurate Lighthouse Beacon service

Create a user for lighthouse beacon Service/User name:

$ sudo useradd --system --no-create-home --shell /bin/false eth-lighthousebeacon

Create a directory for data Service data directory:

$ sudo mkdir -p /var/lib/ethereum/lighthouse/beacon

Set permission for accessing the directory

$ sudo chown -R eth-lighthousebeacon:eth-lighthousebeacon /var/lib/ethereum/lighthouse/beacon

Create configuration file for Lighthouse Beacon service

Open Lighthouse Beacon configuration file

$ sudo nano /etc/systemd/system/eth-lighthousebeacon.service

Copy the configuration below into the file. If needed, check flags documentation.

[Unit]
Description=Lighthouse Consensus Client BN (Ethereum Mainnet)
Wants=network-online.target
After=network-online.target

[Service]
User=eth-lighthousebeacon
Group=eth-lighthousebeacon
Type=simple
Restart=always
RestartSec=5
ExecStart=/usr/local/bin/lighthouse bn \
  --network mainnet \
  --datadir /var/lib/ethereum/lighthouse \
  --http \
  --execution-endpoint http://127.0.0.1:8551 \
  --execution-jwt /var/lib/jwtsecret/ethereum.hex \
#  --checkpoint-sync-url https://mainnet.checkpoint.sigp.io \
  --checkpoint-sync-url=https://beaconstate.info \
  --port 9000 \
  --port6 9090 \
#  --discovery-port 9000 \
  --quic-port 9001 \
  --quic-port6 9091 \
  --http-port 5052

[Install]
WantedBy=multi-user.target

Checkpoint sync endpoints

Press CTRL + X then Y then ENTER to save and exit the config file.

Load changes made in config files to the system
```
$ sudo systemctl daemon-reload
```

Start the service

$ sudo systemctl start eth-lighthousebeacon

Check the state

$ systemctl status eth-lighthousebeacon
$ journalctl -fu eth-lighthousebeacon

Activate service to start automatically

$ sudo systemctl enable eth-lighthousebeacon

Installing NodeJS through the Node Version Manager

Node Version Manager (NVM) is a piece of shell code that allows you to easily install and maintain different versions of Node.js and its associated packages.
1. Check latest verision of NVM on GitHub.
2. View code of NVM ver 0.39.4
```
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.4/install.sh
```
3. Install NVM
```
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.4/install.sh | bash
```
  NVM will be installed with permissions of a user that processing that request (you). NVM is installed to user account, specifically to "~/.bashrc" directory.
4. source/reload nvm for an option to use it
```
source ~/.bashrc
```
5. Check available Node.js versions
```
nvm list-remote
```
  Selected version: v
6. Install requested Node.js version
```
nvm install v20.11.0
```
  Node.js is installed with permissions of a user that processing that request (you)
7. Show active Node.js version in use
```
node -v
```
  If o version is selected, use nvm use 20.11.0
Install build-essential tools
```
sudo apt-get install build-essential -y
```

Install Yarn

corepack enable

corepack prepare yarn@stable --activate

yarn help

Build Lodestar

Download latest Lodestar client from GitHub

cd ~/downloads && git clone -b stable https://github.com/chainsafe/lodestar.git

Install yarn
```
cd lodestar && yarn install
```
Build Lodestart client
```
yarn run build
```
Check builded Lodestar version
```
./lodestar -v
```

Copy new production client to /usr/local/bin directory
```
sudo cp -a ~/downloads/lodestar /usr/local/bin
```

Configurate Lodestar Beacon service

Configuring lodestarbeacon service user and data directory

Create a service user

Service/User name:

$ sudo useradd --system --no-create-home --shell /bin/false eth-lodestarbeacon

Enable eth-lodestarbeacon user access NodeJs
User with NodeJs:
```
sudo usermod -aG myserveruser eth-lodestarbeacon
```
Create a directory for Lodestar Beacon data
Service data directory:
```
sudo mkdir -p /var/lib/ethereum/lodestar/beacon
```

Set directory ownership

sudo chown -R eth-lodestarbeacon:eth-lodestarbeacon /var/lib/ethereum/lodestar/beacon

Create configuration file for the Lodestar beacon service

Open the configuration file

sudo nano /etc/systemd/system/eth-lodestarbeacon.service

Copy following configuration to the file

Installed NodeJs version on the server:
This can be get with command $ node version

[Unit]
Description=Lodestar Consensus Beacon Client (Ethereum mainnet)
Wants=network-online.target
After=network-online.target
[Service]
User=eth-lodestarbeacon
Type=simple
Restart=always
RestartSec=5
WorkingDirectory=/usr/local/bin/lodestar
Environment="PATH=/home/myserveruser/.nvm/versions/node/v20.11.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
ExecStart=/usr/local/bin/lodestar/lodestar beacon \
  --network mainnet \
  --dataDir /var/lib/ethereum/lodestar/beacon \
  --execution.urls http://127.0.0.1:8551 \
  --jwt-secret /var/lib/jwtsecret/ethereum.hex \
  --port 9000 \
  --port6 9090
  #--suggestedFeeRecipient 0x.........................
[Install]
WantedBy=multi-user.target

Check all available flags.

Press CTRL + X then Y then ENTER to save and exit the config file.

Reload daemon
```
sudo systemctl daemon-reload
```
Run the service
```
sudo systemctl start eth-lodestarbeacon
```

Monitor the running lodestar Beacon service

systemctl status eth-lodestarbeacon

journalctl -fu eth-lodestarbeacon

Enable auto start on server statup

sudo systemctl enable eth-lodestarbeacon

Install Java

cd ~/downloads && wget https://download.oracle.com/java/21/latest/jdk-21_linux-x64_bin.deb
sudo apt install ./jdk-21_linux-x64_bin.deb

java --version

Find the latest stable version of Teku on Github
Find latest Teku version at Github: https://github.com/Consensys/teku/releases
Write latest stable Teku version:

This will update the url links in the guide below.

Download the latest Teku version

cd ~/downloads && curl -LO https://artifacts.consensys.net/public/teku/raw/names/teku.tar.gz/versions/24.10.3/teku-24.10.3.tar.gz

Unpack the downloaded Teku version
```
$ tar xvf teku-24.10.3.tar.gz
```

Copy the Teku Library

sudo cp -a ~/downloads/teku-24.10.3 /usr/local/bin/teku

Remove downloaded files

cd ~/downloads && rm teku-24.10.3.tar.gz && rm -r teku-24.10.3

Configurate Teku Beacon service

Create a user

Service/User name:

sudo useradd --system --no-create-home --shell /bin/false eth-tekubeacon

Create a folder for Tekubeacon data on Ethereum chain
Service data directory:
```
sudo mkdir -p /var/lib/ethereum/tekubeacon
```

Set access permission and ownership for the Nethermind data folder

sudo chown -R eth-tekubeacon:eth-tekubeacon /var/lib/ethereum/tekubeacon

Configurate & Run Tekubeacon service

Create configuration file for Tekubeacon service

Open Tekubeacon configuration file

sudo nano /etc/systemd/system/eth-tekubeacon.service

Copy configuration

[Unit]
Description=Teku Consensus Client (Ethereum Mainnet)
Wants=network-online.target
After=network-online.target
[Service]
User=eth-tekubeacon
Group=eth-tekubeacon
Type=simple
Restart=always
RestartSec=5
Environment="JAVA_OPTS=-Xmx5g"
Environment="TEKU_OPTS=-XX:-HeapDumpOnOutOfMemoryError"
ExecStart=/usr/local/bin/teku/bin/teku \
  --network=mainnet \
  --data-path=/var/lib/ethereum/tekubeacon \
  --ee-endpoint=http://127.0.0.1:8551 \
  --ee-jwt-secret-file=/var/lib/jwtsecret/ethereum.hex \
  --metrics-enabled=true \
  --rest-api-enabled=true \
  --validators-proposer-default-fee-recipient= 0x... \
  #--checkpoint-sync-url= \
  --initial-state=https://checkpoint.gnosischain.com/eth/v2/debug/beacon/states/finalized
[Install]
WantedBy=multi-user.target

Press CTRL + X then Y then ENTER to save and exit the config file.

Load changes
```
sudo systemctl daemon-reload
```
Start the Beacon chain service
```
sudo systemctl start eth-tekubeacon
```

Check the service

systemctl status eth-tekubeacon
journalctl -fu eth-tekubeacon

Start the service automatically on system startup
```
sudo systemctl enable eth-tekubeacon
```

Interactive Solo Ethereum staking guide for Ubuntu OS

Disclaimer

Prerequisites for this Ethereum staking

Securying Ubuntu OS

Upgrade & update on the latest software and security updates.

Configure the Firewall

Managing the SSH access

Check, whether SSH is installed on the server

Modify default 22 SSH port

Configure SSH keys

Configuring 2FA authentization

Configuring Brute-force & DDoS protection

Securying remote access tips

Option 1: Stop and disable the ssh service

Option 2: Disable traffic on SSH port

Consider installing and setting VPN to hide your public IP

Check / set basic config for your node machine

Generate Client Authentication Secret for ethereum

Install and configurate preferred execution client

Installing Nethermind client

Find the latest stable version of Nethermind on Github

Download Nethermind version 1.29.1-dfea5240 to your node

Install package for unzipping

Unzip the downloaded file

Copy the client to /usr/local/bin/

Remove downloaded files

Create a system user and data directory for Nethermind service

Create a user

Create a folder for Nethermind data on Ethereum chain

Set access permission and ownership for the Nethermind data folder

Configurate & Run Nethermind service

Choose ports for communication

Ports selection

Enable port for P2P communication (execution client)

Create configuration file for Nethermind service

Start the Nethermind service

Check the service

Start the service automatically on system startup

Installing Erigon client

Find the latest stable version of Erigon on Github

Download Erigon version 2.60.10

Verify hash of donwnloaded file

Extract the downloaded package

Copy extracted Erigon library

Remove downloaded files

Create a system user and data directory for Erigon service

Create a user

Create a folder for Erigon data on ethereum network

Set access permission and ownership for the Erigon data folder

Configurate & Run Erigon Service

Choose ports for communication

Ports selection

Enable port for P2P communication (execution client)

Create configuration file for Erigon service

Start the service

Check the service

Start the service on system startup

Consensus client

Install Consensus client

Find the latest stable version of Lighthouse on Github

Download Lighthouse version 5.3.0 to your node

Configurate Lighthouse Beacon service

Create configuration file for Lighthouse Beacon service

Load changes made in config files to the system

Installing NodeJS through the Node Version Manager

View code of NVM ver 0.39.4

Install NVM

source/reload nvm for an option to use it

Check available Node.js versions

Install requested Node.js version

Show active Node.js version in use

Install build-essential tools

Install Yarn

Build Lodestar

Download latest Lodestar client from GitHub

Install yarn

Build Lodestart client

Check builded Lodestar version

Copy new production client to /usr/local/bin directory

Configurate Lodestar Beacon service

Check, whether `SSH` is installed on the server

Modify default `22` SSH port

Download Nethermind version `1.29.1-dfea5240` to your node

Copy the client to `/usr/local/bin/`

Download Erigon version `2.60.10`

Download Lighthouse version `5.3.0` to your node

source/reload `nvm` for an option to use it

Copy new production client to `/usr/local/bin` directory