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How to setup Windows QT Wallet as the Main Wallet and Ubuntu Server 16.04 LTS for the VPS. Read through the guide first. Make sure to copy and paste keys and transactionhash to notepad or paper. For the VPS, I am using Vultr. Shilling the referral link. I plan to host in multiple datacenters to spread the masternodes around. VPS Vultr https://www.vultr.com/?ref=7307426 [2FA] Digital Ocean https://m.do.co/c/6dffa03c3628 [2FA] Linode https://www.linode.com/pricing [2FA] Ramnode https://ramnode.com/vps.php Wholesaleinternet https://www.wholesaleinternet.net/vps/ Kinsufi https://www.kimsufi.com/us/en/vps-ssd.xml Alpharacks https://www.alpharacks.com/ChineseNewYear/ OVH https://www.ovh.com/world/vps/vps-ssd.xml Dedicated Wholesaleinternet https://www.wholesaleinternet.net/dedicated/ Kimsufi https://www.kimsufi.com/us/en/servers.xml BuyVM https://buyvm.net/kvm-dedicated-server-slices Hosthatch https://hosthatch.com/ssd-vps [2FA] Server Discussions Lowendtalk https://lowendtalk.com/categories/offers Setup QT Wallet 1. Make sure your wallet is fully synced before proceeding further. Using the QT wallet, enter the debug console (Help > Debug window). This step will generate a masternode private key, please note this down and this will be required later. Type the following command: masternode genkey 2. Get masternode address for your masternode. Replace masternodename with your desired masternode name. getaccountaddress masternodename 3. Send from your wallet exactly 5,000 DNR to the address you generated from step 2. Ensure you get 20 confirmation before proceeding. 4. Get the outputs of the transaction of the 5,000 DNR send to your masternode address. The long hash is your Transaction Hash and the number after is the Transaction Index. Please note this down and this will be required later. masternode outputs 5. Navigate to your users Roaming folder. Copy and paste %AppData% This should show you the Roaming folder and find Denarius folder. 6. In the denarius folder we will create a denarius.conf file, if it is has not been created already. Copy and paste the configuration below to your denarius.conf file. staking=0 addnodes to the bottom of the denarius.conf above. 7. Create and save another configuration file called masternode.conf in the same location as denarius.conf. <Alias name of your choice> <VPS IP address>:9999 <Private Key from step 1> <TransactionHash from step 4> <Transaction Index from step 4> Example: MNDNR 126.96.36.199:9999 DF92WPpkqbr7s6Si4fdsfssjjapuFzAXwETCrpPJubnrmU6aKzh c8f4965ea57a68d0e6dd384324dfd28cfbe0c801015b973e7331db8ce018716999 1 8. Ensure you close or restart your main wallet. How to use Putty for Windows to login to your VPS https://www.vultr.com/docs/connecting-to-your-server-with-ssh-via-putty-on-windows Ubuntu VPS Masternode Server Setup Change root password For security reasons you should change the root password with a strong and randomly generated password that you store somewhere safe. passwd root Input your new password twice and continue. Add User and Change User Permissions To take additional security measures, we will create a new user under which we will run the masternode. Use the following command to add a user and replace (name) with the name of your choice. adduser <name> Input a password for your user when prompted. Next we need to give this user administrative permissions with the following command: usermod -aG sudo <name> Update Linux and Install Security Features Use the following commands install updates for Ubuntu: apt-get update && apt-get upgrade -y Press “Y” and Enter when prompted to continue. Next we will install a firewall with the following command: apt install ufw python virtualenv git unzip pv make nano Press “Y” and Enter when prompted to continue. SSH Key SSH keys are a safer way to login. If you are not interested in SSH keys, skip to the next part of the tutorial. Use the following Vultr Doc to make an SSH key: How Do I Generate SSH Keys? After you get your public key, login with your new user again. su username mkdir ~/.ssh; nano ~/.ssh/authorized_keys Copy the public key directly from the PuTTY key generator into the terminal Save the file, then change the permissions of that file. sudo chmod 700 -R ~/.ssh && chmod 600 ~/.ssh/authorized_keys Return to the root user. exit SSH configuration Now we will make the SSH daemon more secure. Let's start with the config file: nano /etc/ssh/sshd_config Disable root ssh login This step will disable root login through SSH, it is entirely optional but highly recommended. Find this line: PermitRootLogin yes ... and change it to: PermitRootLogin no Find the line that specifies PasswordAuthentication, uncomment it by deleting the preceding #, then change its value to "no". It should look like this after you have made the change: sshd_config — Disable password authentication PasswordAuthentication no This will make the server more secure against bots that try brute force and/or common passwords with user root and port 22 Restart SSH daemon Now that we made the changes to secure the SSH Login, restart the SSH service: service ssh restart This will restart and reload the server settings Firewall Settings note: port 33339 is P2P port for Denarius ufw allow ssh/tcp ufw allow 9999/tcp ufw allow 33339 ufw allow 19999 ufw logging on ufw enable press "Y" and Enter when prompted to continue Create Swapfile fallocate -l 4G /swapfile chmod 600 /swapfile mkswap /swapfile swapon /swapfile nano /etc/fstab Add the code below at the end of the file, then press “Ctrl + X” to close the editor, then “Y” and Enter to save the file. *Separate the words and numbers with a TAB. /swapfile none swap sw 0 0 Fail2Ban Install Finally we will install an optional security feature called “Fail2Ban”. This feature bans malicious IP addresses by scanning log files for failed login attempts. apt-get install fail2ban Press “Y” and Enter when prompted to continue. If you want to dig into fail2ban some more -> https://linode.com/docs/security/using-fail2ban-for-security/#configure-fail2ban Reboot Server Now we will finalize the updates by rebooting the server. reboot now You will be disconnected and the server will reboot automatically. From this point on, you will login to your server and run the masternode from the user you created previously. Install Masternode Dependencies Log into your VPS as the user you previously created. Terminal: Replace <username> with your username ssh <username>@xxx.xxx.xxx.xxx PuTTY: Follow the steps at the start of this guide to connect to the VPS. When prompted for “login as” use your user name instead of “root” Input the follow commands to install the required dependencies. Enter your password if prompted. sudo apt-get install build-essential libssl-dev libboost-all-dev libminiupnpc-dev libqrencode-dev sudo add-apt-repository ppa:bitcoin/bitcoin sudo apt-get update sudo apt-get -y install libdb4.8++-dev If you get an error above run this first sudo apt-get install software-properties-common Install Denarius Mainnet master Branch: Input the following commands to install the mainnet masternode branch. git clone https://github.com/carsenk/denarius cd denarius git checkout master cd src make -f makefile.unix It will take about 10 minutes while your server processes and installs the masternode files.★ If your VPS gets hung up for an extended period throughout the process you may need to upgrade to a VPSwith more RAM. 2GB is recommended.You will know that the process is complete when you see the following:<username>@<servername>:~/denarius/src$This means the VPS is ready for further commands and that you are currently in the “~/denarius/src” directory.From here we will enter the command that is used to start the Denarius Server Deamon ./denariusd It won’t start up now because we have not configured the denarius.conf file, but we need some information the output provides. Copy the lines (as shown above) that start with code below and save it. rpcuser= rpcpassword= We will then create a denarius.conf file and add these lines to the file. To create and edit the config file use the command below: nano ~/.denarius/denarius.conf Copy in your rpcuser and rpc password at the top, Copy and paste the configuration below to your denarius.conf file. Make sure to replace the values that are unique to your node without “< >”. Ensure that rpcuser and rpcpassword are different than you had specified in the main wallet. rpcuser=<rpc_user> rpcpassword=<rpc_password> rpcallowip=127.0.0.1 daemon=1 staking=0 listen=1 logtimestamps=1 maxconnections=256 port=9999 masternode=1 masternodeprivkey=<private key generated in step 1> Addnodes to the bottom of the above denarius.conf file. Add chaindata cd ~/.denarius rm -rf database txleveldb smsgDB wget https://gitlab.com/denarius/chaindata/raw/master/chaindata.zip unzip chaindata.zip If it asks to overwrite type A for all. Start your Denarius daemon. cd ~/denarius/src ./denariusd Wait for sync to finish. To check if you are fully synced type ./denariusd getinfo And wait for the current block to show up. Start masternode remotely - QT wallet From your main computer, go to the debug console and verify masternode.conf file is setup properly masternode list-conf Make sure the data output here matches the information entered in the masternode.conf file. If not, edit the file and correct the data. You will have to restart the main wallet, if you update the masternode.conf file. If the masternode configuration matches then we can finally start the masternode. Start the masternode by executing the following (wallet needs to be unlocked): masternode start-alias <alias name specified in masternode.conf> If the output says “masternode is stopped” then run the following command: masternode start Verify on VPS masternode - VPS wallet To ensure the masternode is running properly you can use the debug and status commands: ./denariusd masternode debug If there are no issues, there should be a message returned with no problems found. ./denariusd masternode status You should get a status 9 if the masternode is active and there is no issue! How to read debug log on VPS wallet. tail -f ~/.denarius/debug.log You can see if your masternode is listed on the QT wallet - Masternode Icon > Denarius Network tab. If it does not appear straight away, give it 30mins and restart the wallet to check if your masternode shows up on the list If you watch the debug.log while you run masternode start-alias masternodename from the QT wallet, you might be able to catch the screenshot below. Masternode Status Codes MASTERNODE_NOT_PROCESSED: 0 MASTERNODE_IS_CAPABLE: 1 MASTERNODE_NOT_CAPABLE: 2 MASTERNODE_STOPPED: 3 MASTERNODE_INPUT_TOO_NEW: 4 MASTERNODE_PORT_NOT_OPEN: 6 MASTERNODE_PORT_OPEN: 7 MASTERNODE_SYNC_IN_PROCESS: 8 MASTERNODE_REMOTELY_ENABLED: 9 Thanks to @Ragtag for clearly writing how the cold wallet works for testnet.