Security Overview We automatically setup all services with several layers of security activated by default. This includes: Automated SSL / TLS Network Firewall IP Rate Limiter Output Cache Accidental termination protection & Grace period Manage SSH Keys Each of these features are accessible from your Dashboard via the Security tab. Custom domain and automated encryption (SSL/TLS) If you have activated the firewall on your service ensure port 80 is open or else certificate creation/renewal will fail Access the "Manage SSL Domains" option within the "Custom Domain Names" row located in the overview tab of the service dashboard. From there you can manage allowed domains for SSL. If you want to add a new domain, just type it and press enter to add it to the list of authorized domains. You will also need to create a DNS entry to point your domain to the IP address of your service. You can either create an A record or CNAME record to point to your service. CNAME is preferred as it won't change even if your IP change (eg: this can happen if your clone/migrates your service to another provider. Once added, you can verify if your DNS entry is propagated with a tool like https://dnschecker.org/ Once propagated SSL should work instantly on your service. The certificate will be automatically generated and renewed. For some software you will also have to update an env var to indicate the domain to be used. To do that in the overview screen of your service click on UPDATE CONFIG button > Env tab > there update the domain env var with your own domain Cloudflare users If you are using Cloudflare reverse proxy (orange cloud icon) please check detailed instructions about Cloudflare & Elestio here: https://docs.elest.io/books/security/page/using-cloudflare Troubleshooting SSL not generated You can display the nginx log with this command in a terminal: cd /opt/elestio/nginx; docker-compose logs -f; press ctrl+c to stop displaying the live logs Reset SSL_DATA folder In some cases, the /opt/elestio/nginx/ssl_data folder can become corrupted, if this happens, connect to a terminal and try this: cd /opt/elestio/nginx/; docker-compose down; mv ./ssl_data/ ./ssl_data_old/; mkdir ./ssl_data/; chmod 777 ./ssl_data/; docker-compose up -d Once executed just open your custom website url again and your certificate should be generated and your site served over SSL/TLS. Using Cloudflare Cloudflare DNS: If you wish to use Cloudflare for DNS ONLY, you can configure it just like any other DNS provider, and simply follow the steps for adding a custom domain as usual. WARNING: Your domain DNS entry must have a GRAY cloud, not an ORANGE (proxied) cloud next to the entry. Using Cloudflare's proxy for your domain without additional configuration will cause all incoming connections to fail! This is the correct image shown for DNS-only entries. Cloudflare Proxy Even though Elest.io automatically provides SSL and has a firewall, there can be advantages to using Cloudflare for Proxying traffic, notably DDoS attacks and automatic filtering of scripted attacks. Note: Cloudflare only proxies traffic on certain ports. If you want to use this hostname for SSH, FTP, or other services whose ports are not listed in the above link, you must configure Cloudflare to provide DNS only or use Cloudflare's Spectrum offer. Because Elest.io already creates an SSL certificate for your website trusted by a root CA, the recommended configuration is to set Cloudflare to use Strict SSL verification when connecting to your server. Before continuing, ensure you have already configured the domains as per the instructions on the previous page. Option 1: To set up strict SSL verification for your whole domain : Navigate to the SSL/TLS section of your domain's dashboard. Select the "Full (strict)" option. Your changes will be saved automatically. You're done! Option 2: To set up strict SSL verification for a  specific subdomain: In your domain's dashboard, navigate to Rules > Configuration Rules and click Create Rule Name your rule, and configure the incoming request filters.   3. Configure the SSL to Strict 4. Click Save Option 3: Manual configuration (Advanced) If you need a custom implementation, you can disable the creation of an SSL certificate with the following steps. Create a CNAME record for your Cloudflare entry and point to the CNAME provided for that service in the Elestio dashboard. These changes can be overwritten in the future if you modify the list of domains via the Elest.io dashboard. 1) Connect to the VM with SSH and type this: nano /opt/elestio/nginx/.env there remove your domain from the first line and save with CTRL+X then type this command: cd /opt/elestio/nginx; docker-compose down; docker-compose up -d; After that, nginx won't try again to obtain an SSL certificate for your domain. Network Firewall By default, we only open the ports necessary for the application you have deployed.  How can I restrict access to my service by IP address? From the Dashboard, select " Security" , then " Show Settings" on the Firewall row From there you can modify, remove, or add new rules to open a port from your service to the internet (or just to a specific target IP). All services come preconfigured with firewall rules that match the software you are deploying. You have to keep port 80 open to any ipv4/ipv6 or else Letsencrypt won't be able to generate an SSL certificate. Here is a compilation of the ports necessary for Elestio Automation: Mandatory Application Protocol Port  Usage   ✔️ Input  TCP 22 Automation SSH ❌ Input  UDP 4242 Nebula/ Global IP ❌ Input  TCP 18345 VS Code ❌ Input  TCP 18374 Open Terminal ❌ Input  TCP 18346 File Explorer ❌ Input TCP 18445 Tail Logs ❌ Input  TCP 18344 Terminal ❌ => Ports are necessary only if you are utilizing specific tools and activating global private IP functionality. IP rate limiter From the Dashboard, click on Security then Rate Limiter > Show Options. From here, you can easily modify and adjust your service's rate limiter configurations, by amount and per minute or second, per IP address. By default, all services are preconfigured with a rate limiter of 150 requests per minute and per IP address. Rate limiter is used only for web traffic. Output Cache From the Dashboard, navigate to the Security tab and select Show Options under Output Cache. From here, you can modify your output cache configurations. All GET requests are cached for 3 seconds, which is useful in preventing Denial of Service (DOS) attacks. All services come preconfigured with Output cache by default. Output cache is used for web traffic only. Termination protection & grace period You can enable or disable the Termination protection option from your Dashboard Overview , using the toggle on the right-hand side. This setting is disabled by default. It's not possible to change software versions, delete, shut down, power off, reset or reboot your service when Termination protection is enabled. To make these changes, you must first disable Termination protection. Our grace period for storing backups after the deletion of service is 7 days, making it easier for you to restore your service in this window of time for any reason. Manage SSH Keys From the Dashboard, navigate to the Security tab and select the Show Options button to Manage SSH Keys. From here, you can add or remove SSH keys allowed on the server. Add an SSH key Click on the Add key . Simply give your key a title and save! Deleting an SSH key Select the 'trash' icon to the right of the key you wish to delete. We'll always double-check with you before making a deletion, just to be sure! SMTP service All deployed services include a basic preconfigured SMTP service, useful for sending alerts and notifications from your service. This is free, but comes with a few limitations: You can only send transactional emails. Marketing emails are not permitted. Any violation of this will lead to a suspension or termination of your service. You can send up to 300 transactional emails per hour. That's up to 7200 emails per day! All emails must be sent from [domain]@vm.elestio.app where [domain] is the URL of your service. Attempts at sending from any other email address will be rejected. The SMTP service is only available from the global private network IP of your VM. Of course in several cases you will want to change the smtp configuration in the web UI of your software to use another smtp service. It's useful if you want to be able to configure another sender address or to overcome any limitations stated above. Check out our list of recommended SMTP providers: AWS SES SendInBlue Mailgun Sendgrid     Multi-factor authentication By default, Elestio uses Email-based MFA, each time you log in to Elestio we will send you an email with a one-time code to enter into our UI to be able to connect. This protection is in place to enforce security and avoid account hacking. We also have TOTP-based MFA, this is more secure because it's based on an app installed on your phone to generate TOTP codes instead of us sending them by email. So even if your mailbox is compromised your Elestio account will still be safe. We recommend all users use TOTP Generator, you can activate it in a few clicks from our dashboard > user profile > Security tab. The process to activate TOTP MFA on your account Open the account security tab here: https://dash.elest.io/account/security Click on Configure button in Manage Two-Factor Authentication. Select the Authenticator App tab. Download an authenticator app: Authy (recommended) or Google Authenticator or Microsoft Authenticator Open your authenticator app then scan the QR code on the screen Generate a code with your app and enter it on the Elestio screen Click on Validate Done, Strong MFA is now enabled on your account, and will be required to login into your Elestio account You should keep the text version somewhere safe (in orange in the screenshot), this will allow you to recover in case you lose your phone or authenticator app. If you have lost both your authenticator app and text secret, you can contact our support team via email with proof of identity to get MFA removed from your account. The process to Activate Email Based MFA on your account Open the account security tab here: https://dash.elest.io/account/security Click on Configure button in Manage Two-Factor Authentication. Select the Email Based tab. Click on Enable button to activate it. The process to Deactivate MFA on your account Open the account security tab here: https://dash.elest.io/account/security Click on Configure button in Manage Two-Factor Authentication. Select the Disabled tab. To confirm the action, type disable in the confirmation input field on the confirmation modal. Click on Disable button to disable it.