Add and configure
one or more domain names (suffixes) for the DNS search list (DNSSL).
The maximum suffix length is 255 bytes. A DNS search list
is a list of domain suffixes that a DNS client router appends (one
at a time) to an unqualified domain name before it enters the name
into a DNS query, thereby using a fully qualified domain name in
the DNS query. For example, if a DNS client tries to submit a DNS
query for the name “quality” without a suffix, the router appends
a period and the first DNS suffix from the DNS search list to the
name and transmits the DNS query. If the first DNS suffix on the
list is “company.com”, the resulting DNS query from the router is
for the fully qualified domain name “quality.company.com”. If
the DNS query fails, the router appends the second DNS suffix from
the list to the unqualified name and transmits a new DNS query.
The router tries DNS suffixes until a DNS lookup is successful (ignores
the remaining suffixes) or until the router has tried all of suffixes
on the list. Configure the firewall with the suffixes you
want to provide to the DNS client router in a Neighbor Discovery
DNSSL option; the DNS client receiving the DNSSL option uses the suffixes
in its unqualified DNS queries. You can configure a maximum
of eight domain names (suffixes) for a DNS search list that the
firewall sends—in order listed from top to bottom—in an NDP router
advertisement to the recipient, which uses them in the same order.
Select a suffix and Move Up or Move Down to
change the order of the suffixes or Delete a
suffix from the list when you no longer need it. |