Draytek VIGOR2860 series User Manual page 496

Control
Access List
After finished the above settings, click OK to save the configuration.
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There are several servers provided by the system to allow
you managing the router from Internet. Check the box(es) to
specify.
Disable PING from the Internet - Check the checkbox to
disable all PING packets from the Internet. For security issue,
this function is enabled by default.
You could specify that the system administrator can only
login from a specific host or network defined in the list. A
maximum of three IPs/subnet masks is allowed.
IPv6 Address /Prefix Length- Indicate the IP address(es)
allowed to login to the router.
Vigor2860 Series User's Guide