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SonicOS 5.8.1 Administrator Guide
DNS Name Lookup
The SonicWALL security appliance has a DNS lookup tool that returns the IP address of a
domain name. Or, if you enter an IP address, it returns the domain name for that address.
Step 1 Enter the host name or IP address in the Look up name field. Do not add http to the host name.
Step 2 The SonicWALL security appliance queries the DNS Server and displays the result in the
Result section. It also displays the IP address of the DNS Server used to perform the query.
The DNS N
ame Lookup section also displays the IP addresses of the DNS Servers configured
on the SonicWALL security appliance. If there is no IP address or IP addresses in the DNS
Server fields, you must configure them on the Network > Settings page.
Find Network Path
Find Network Path indicates if an IP host is located on the LAN or WAN ports. This can
diagnose a network configuration problem on the SonicWALL security appliance. For example,
if the SonicWALL security appliance indicates that a computer on the Internet is located on the
LAN, then the network or Intranet settings may be misconfigured.
Find Network Path can be used to determine if a target device is located behind a network
router and the Ethernet address of the target device. It also displays the gateway the device is
using and helps isolate configuration problems.
Ping
The Ping test bounces a packet off a machine on the Internet and returns it to the sender. This
test shows if the SonicWALL security appliance is able to contact the remote host. If users on
the LAN are having problems accessing services on the Internet, try pinging the DNS server,
or another machine at the ISP location. If the test is unsuccessful, try pinging devices outside
the ISP. If you can ping devices outside of the ISP, then the problem lies with the ISP
connection.
Step 1 Select Ping from the Diagnostic Tool menu.
Step 2 Enter the IP address or host name of the target device and click Go.
Step 3 In the Interface pulldown menu, select which WAN interface you want to test the ping from.
Selecting ANY allows the appliance to choose among all interfaces—including those not listed
in the pulldown menu.
Step 4 If the test is successful, the SonicWALL security appliance returns a message saying the IP
address is alive and the time to return in milliseconds (ms).