Configure RDNS Servers and DNS Search List for IPv6 Router Advertisements

1. Enable the firewall to send IPv6 Router Advertisements from an interface.

   1. Select NetworkInterfaces and Ethernet or VLAN.
   2. Select the interface to configure.
   3. On the IPv6 tab, select Enable IPv6 on the interface.
   4. On the Router Advertisement tab, select Enable Router Advertisement.
   5. Click OK.
2. Specify the Recursive DNS Server addresses and DNS Search List the firewall will advertise in ND Router Advertisements from this interface.

   The RDNS servers and DNS Search List are part of the DNS configuration for the DNS client so that the client can resolve IPv6 DNS requests.

   1. Select NetworkInterfaces and Ethernet or VLAN.
   2. Select the interface you are configuring.
   3. Select IPv6DNS Support.
   4. Include DNS information in Router Advertisement to enable the firewall to send IPv6 DNS information.
   5. For DNS Server, Add the IPv6 address of a Recursive DNS Server. Add up to eight Recursive DNS servers. The firewall sends server addresses in an ICMPv6 Router Advertisement in order from top to bottom.
   6. Specify the Lifetime in seconds, which is the maximum length of time the client can use the specific RDNS Server to resolve domain names.

      • The Lifetime range is any value equal to or between the Max Interval (that you configured on the Router Advertisement tab) and two times that Max Interval. For example, if your Max Interval is 600 seconds, the Lifetime range is 600-1,200 seconds.
      • The default Lifetime is 1,200 seconds.
   7. For DNS Suffix, Add a DNS Suffix (domain name of a maximum of 255 bytes). Add up to eight DNS suffixes. The firewall sends suffixes in an ICMPv6 Router Advertisement in order from top to bottom.
   8. Specify the Lifetime in seconds, which is the maximum length of time the client can use the suffix. The Lifetime has the same range and default value as the Server.
   9. Click OK.
3. Commit your changes.

   Click Commit.