Configuring a Hostname (FQDN) for Device's Web Interface

You can configure a hostname (fully qualified domain name / FQDN) for the device's Web interface. This means that you can access the Web interface using the device's FQDN (e.g., http://mysbc.com) instead of its IP address. You can also enforce (default) access only through the device's FQDN, blocking any access attempts using its IP address.

If you configure an FQDN, you also need to define it on a DNS server. When you try to access the Web interface with the FQDN, a query is first sent to the DNS server to resolve the FQDN into the device's IP address.

If you access the device's Web interface using its FQDN, the toolbar displays the FQDN (first 16 characters only) instead of the device type.

It's recommended to configure an FQDN for accessing the device's Web interface because it helps protect the device against HTTP Host header attacks and DNS rebinding attacks.

➢ To configure an FQDN for Web interface:
1. Open the Web Settings page (Setup menu > Administration tab > Web & CLI folder > Web Settings).
2. In the 'Web Server Name' field [WebHostname], enter an FQDN that complies with standard Domain Name System (DNS) syntax (e.g., www.sbcols1.eastus.12345.com):

3. To enforce access to the device's Web interface only through its FQDN instead of its IP address, select the 'Enforce Web Host Name' check box:

4. Click Apply.

Due to a known issue, the following OVOC features do not function when the 'Enforce Web Host Name' parameter is enabled:

● OVOC Single Sign-On (SSO)
● OVOC Performance Monitoring (PM)
● OVOC Service Availability

If you need to use any of these OVOC features, make sure that the 'Enforce Web Host Name' parameter is disabled.

● If you disable the 'Enforce Web Host Name' parameter, or you leave the ‘Web Server Name’ parameter empty (regardless of the 'Enforce Web Host Name' parameter's setting), the Web interface can be accessed through its FQDN or IP address.
● If you're upgrading the device from version 7.4.500-2 (7.40A.500.775) or later to version 7.4.500-5 or later and have configured the ‘Web Server Name’ parameter and use the device’s IP address to access the Web interface, access to the device through the IP address will be denied. If you want to retain such capability, disable the ‘Enforce Web Host Name’ parameter.
● To configure an FQDN that is used for the CLI prompt name, SNMP interface's SysName object value, and communication with OVOC, see Configuring a Hostname for the Device.