Blocking a specified domain name on the firewall

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For V100R001 and V5, you can configure a security policy, set the destination address to a domain name group that contains the list of domain names to be blocked, and set the action to block to block these domain names. You can also configure URL filtering to blacklist the domain names to be blocked so as to block them.
For V300R001, you can only configure URL filtering to blacklist the domain names to be blocked so as to block them.

Other related questions:
Method used to view the license center domain name on firewalls
You can view the license center domain name as follows: Run the display license-server domain command.

Blocking a specified interface on a WLAN device using STP
You can use one of the following methods to block a specified interface on a WLAN device: 1. Run the stp priority command to set the device priority. 2. Run the stp cost command to set the path cost of the interface. 3. Run the stp port priority command to set the interface priority.

Whether the L2TP domain name and tunnel key are case-sensitive on the USG2000 and USG5000
On the USG2000 and USG5000, the L2TP domain name is case-insensitive but the tunnel key is case-sensitive.

Blocking IP addresses on the firewall
You can configure a security policy to block the traffic of a specified IP address. In the security policy, specify the source address and destination address as specific IP addresses and set the policy action to block.

Whether the USG2000 and USG5000 series support the NAT based on domain names accessed by intranet users
USG firewalls do not support NAT based on domain names accessed by intranet users. To allow users to access specified websites, you can configure the URL filtering.

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