User guide

Using the Internal DNS Server
224 Check Point Safe@Office User Guide
5. Click OK.
The VLAN is deleted.
Using the Internal DNS Server
The Safe@Office appliance includes an internal DNS server, which can resolve DNS
names for hosts defined as network objects. Each host is assigned a DNS name in the
format <networkobjectname>.<domainsuffix>, where
<networkobjectname> is the name of the network object representing the host, and
<domainsuffix> is the domain name suffix configured for the internal DNS server.
The internal DNS server will reply to all DNS requests for the host's DNS name with the
host's IP address.
In addition to resolving network objects, the internal DNS server also resolves requests for
the current gateway. If a gateway hostname is defined, the DNS server will reply to DNS
requests in the format <hostname>.<domainsuffix> with the gateway’s internal IP
address. For information on configuring the gateway's hostname, see Configuring a
Gateway Hostname on page 724.
Note: The internal DNS server responds to DNS requests from internal network hosts
only. It does not respond to requests from the Internet.
Example
If a computer with the IP address 192.188.22.1 is represented by a network object called
"server1", and the internal DNS server is configured with the domain suffix
"mycompany.com", then the computer's DNS name will be "server1.mycompany.com",
and the internal DNS server will reply to all DNS requests for "server1.mycompany.com"
with the IP address 192.188.22.1.
In addition, if the gateway is configured with the hostname "mygateway", the DNS server
will reply to all DNS requests for "mygateway.mycompany.com" with the gateway’s
internal IP address.