Cisco SA520-K9 Administration Guide - Page 222

Troubleshooting Pinging to Test LAN Connectivity A Testing the LAN path from your PC to a remote device STEP 1 On your PC, click the Windows Start button, and then click Run. STEP 2 Type ping -n 10 where -n 10 specifies a maximum of 10 tries and is the IP address of a remote device such as your service provider's DNS server. Example: ping -n 10 10.1.1.1. STEP 3 Click OK and then observe the display (see the previous procedure). STEP 4 If the path is not working, do the following: • Check that the PC has the IP address of your firewall is listed as the default gateway. (If the IP configuration of your PC is assigned by DHCP, this information is not visible in your PC's Network Control Panel.) • Verify that the network (subnet) address of your PC is different from the network address of the remote device. • Verify that the cable or DSL modem is connected and functioning. • Call your ISP and go through the questions listed in Symptom: The security appliance still cannot obtain an IP address from the ISP. • Ask your ISP if it rejects the Ethernet MAC addresses of all but one of your PCs. Many broadband ISPs restrict access by allowing traffic from the MAC address of only your broadband modem. Some ISPs additionally restrict access to the MAC address of just a single PC connected to that modem. If this is the case, configure your firewall to clone or spoof the MAC address from the authorized PC. For more information, see Configuring the WAN Connection, page 37. Cisco SA500 Series Security Appliances Administration Guide 222