SonicWALL TZ 210 Series Getting Started Manual page 69

TZ_210_GSG.book Page 58 Thursday, November 13, 2008 7:41 PM
4. If there is a NAT device between the two appliances
sending and receiving TCP probes, the Any TCP-SYN to
Port checkbox must be selected, and the same port
number must be configured here and in the Configure
WAN Probe Monitoring window.
5. Click on the Configure button. The Configure WAN
Probe Monitoring window is displayed.
6. In the Primary WAN Probe Settings menu, select one of
the following options:
• Probe succeeds when either Main Target or Alternate
Target responds
• Probe succeeds when both Main Target and
Alternative Target respond
• Probe succeeds when Main Target responds
• Succeeds Always (no probing)
7. Select Ping (ICMP) or TCP from the Probe Target menu.
8. Enter the host name or IP address of the target device in
the Host field.
9. Enter a port number in the Port field.
10. If there is a NAT device between the two devices sending
and receiving TCP probes, the Any TCP-SYN to Port
checkbox must be selected, and the same port number
must be configured here and in the Configure WAN Probe
Monitoring window.
11. Select the SNWL? checkbox if the target device is a
SonicWALL security appliance. Do not select the SNWL?
Page 58 Multiple ISP / WAN Failover and Load Balancing
box for third-party devices, as the TCP probes may not
work consistently.
12. Optionally, you can enter a default target IP address in the
Default Target IP field. In case of a DNS failure when a
host name is specified, the default target IP address is
used.
13. An IP address of 0.0.0.0 or a DNS resolution failure will use
the Default Target IP configured. If 0.0.0.0 is entered and
no default target IP address is configured, the default
gateway on that interface will be used.
14. Configure the Secondary WAN Probe Settings, which
provide the same options as the Primary WAN Probe
Settings.
15. Click OK.