Synology DS218play Synology NAS Users Guide - Based on DSM 7.1 - Page 51
Security, 8.1 Security settings, 8.2 Secure SignIn
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Chapter 8: Security Chapter 8: Security 8.1 Security settings Protect your Synology NAS from unauthorized logins with firewall rules, Auto Block, and Account Protection from the Control Panel. Proper firewall settings let you control which IP addresses or services have access to DSM. The Auto Block and Account Protection features help make sure that your Synology NAS is safe from brute-force attacks. They block IP addresses or DSM accounts with too many failed login attempts within a specified period. When there are attempts to sign in to your NAS or its services from a specific IP with random username/password combinations, Auto Block prevents users of that IP address from gaining access to the NAS. Account Protection works the same way but focuses on individual accounts, blocking users' access to specific accounts. Certificates from Let's Encrypt or other certificate authorities help secure connections to and from DSM. When you connect to DSM through a web browser, certificates encrypt the information sent between DSM and the browser to prevent any possible information interception. Security settings can be configured in Control Panel > Security. To learn more about these settings respectively, refer to the following articles: Firewall, Protection, and Certificate. 8.2 Secure SignIn Secure SignIn Service is aimed at improving the overall security of DSM accounts while offering easy-to-use and flexible login options. With the use of a single-tap prompt (Approve signin) or a hardware security key, you can sign in without the fuss of manually typing in the password. To further safeguard your account, enable the 2-factor authentication option. After entering the password, as the second step of identity verification, select from either onetime verification codes (OTP), Approve sign-in, or hardware security key for a seamless login experience. Synology offers a mobile authenticator app, Synology Secure SignIn, for approving sign-in requests and receiving OTP codes. To learn more about sign-in methods and 2-factor authentication, refer to the articles under Sign-In Methods. 48