
Synology NAS User's Guide
Based on DSM 4.3
15 Chapter 3: Modify System Settings
HTTP Service
Click the HTTP Service tab to change the port number for accessing DSM or configure HTTPS settings. When
the HTTPS connection function is enabled, any connection to Synology NAS via the HTTPS protocol will be
encrypted with the SSL/TLS encrypting mechanism.
More Information
About redirecting to HTTPS connection:
When the option Automatically redirect HTTP connections to HTTPS is checked, you will be redirected to
port 5001 while trying to access the web DSM through port 5000.
Ports used for HTTPS connection:
DSM: The port number is 5001, so you can access the DSM through the secure channel:
https://Synology_Server_IP:5001/
Web Station: The port number is 443, so you can access Web Station through the secure channel:
https://Synology_Server_IP:443/ or https://Synology_Server_Name:443/
Security
Click the Security tab to modify the security settings for each DSM login session. The following options are
available here:
Logout timer: An automatic logout occurs if you are inactive for the time period you specified in the logout
timer.
Enhance browser compatibility by skipping IP checking: If you access Synology NAS through a HTTP
proxy and encounter random logouts, you can skip IP checking. However, skipping IP checking will lower the
security level.
Improve protection against scripting attacks: This option enhances the system’s protection against cross-
site scripting attacks.
Do not allow DSM to be embedded with iFrame: You can restrict other websites from embedding DSM into
other web pages with iFrame, thus preventing certain types of attacks from malicious websites.
Router Port
Click the Router Port tab to configure router port settings. To open files on the Synology NAS with Internet
services (such as Google Docs or Pixlr Editor), please enter the hostname or public static IP address of the
Synology NAS, as well as the public port number. These settings only need to be modified if different port
numbers were specified for the router port (assigned on your router) and the local port (assigned on your
Synology NAS) during setup.
Certificate
A certificate can be used for SSL secured services of the Synology NAS, such as web, mail, or FTP. Having a
certificate allows users to validate the identity of a server and the administrator before sending any confidential
information. Click the Certificate tab to manage and view the status of Synology NAS certificates, allowing you to
create, import/export, or renew certificates. The certificate setup wizard helps create self-signed certificates or
download certificate signing requests (CSR) for registration with certificate authorities (CA).
For more information regarding managing certificates, please see DSM Help.
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