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Using Diagnostic Tools
Cisco RV130/RV130W Wireless Multifunction VPN Router Administration Guide 124
8
Performing a DNS Lookup
You can use the Lookup tool to find out the IP address of host (for example, a Web,
FTP, or Mail server) on the Internet.
To retrieve the IP address of a Web, FTP, Mail or any other server on the Internet,
type the Internet name in the text box and click Lookup. If the host or domain entry
exists, you will see a response with the IP address. An Unknown Host message
indicates that the specified Internet name does not exist.
To use the Lookup tool:
STEP 1 Choose Administration > Diagnostics > Network Tools.
STEP 2 In the Internet Name field, enter the Internet name of the host.
STEP 3 Click Lookup. The nslookup results appear.
Configuring Port Mirroring
Port mirroring monitors network traffic by sending copies of all incoming and
outgoing packets from one port to a monitoring port. You can use port mirroring as
a diagnostic or debugging tool, especially when fending off an attack or viewing
user traffic from LAN to WAN to see if users are accessing information or websites
they are not supposed to.
The LAN host (PC) should use a static IP address to avoid any issues with port
mirroring. DHCP leases can expire for a LAN host and can cause port mirroring to
fail if a static IP address is not configured for the LAN host.
To configure port mirroring:
STEP 1 Choose Administration > Diagnostics > Port Mirroring.
STEP 2 In the Mirror Source field, select the ports to mirror.
STEP 3 From the Mirror Port drop-down menu, choose a mirror port. If you use a port for
mirroring, do not use it for any other traffic.
STEP 4 Click Save.