Using the Network Diagnostic Tools 65Find Network PathUse the Find Network Path tool to show on which port, LAN, WAN orDMZ where appropriate, an IP host is located. This is helpful to determineif the Firewall is properly configured. For example, if the Firewall thinksthat a machine known to be on the Internet is located on the LAN port,then there is a problem with the configuration of the network or intranetsettings. Find Network Path also shows if the target node is behind arouter, and the Ethernet address of the target node or router. FindNetwork Path also shows which router a node is using, which can helpisolate router configuration problems.1 Select Find Network Path from the Choose a diagnostic tool menu.2 Type the IP address of the device and click Go. The test takes a fewseconds to complete.If the network path is incorrect, check the intranet, static route, and DMZsettings.Find Network Path requires an IP address. Use the Firewall’s DNS NameLookup tool to find the IP address of a host.PingThe Ping tool bounces a packet off a machine on the Internet back to thesender. This test shows if the Firewall is able to contact the remote host. Ifusers on the LAN are having problems accessing services on the Internet,try pinging the DNS server, or other machine at the ISP’s location. If thistest is successful, try pinging devices outside the ISP. This shows if theproblem lies with the ISP’s connection.1 Select Ping from the Choose a diagnostic tool menu.2 Type the IP address of the device being pinged and click Go. The testtakes a few seconds to complete.Ping requires an IP address. Use the Firewall’s DNS Name Lookup tool tofind the IP address of a host.Packet TraceUse the Packet Trace tool to track the status of a data packet orcommunications stream as it moves from source to destination. This is auseful tool to determine if a packet or communications stream is beingstopped at the Firewall, or is lost on the Internet.Select Packet Trace from the Choose a diagnostic tool drop-down list.DUA1611-0AAA02.book Page 65 Thursday, August 2, 2001 4:01 PM
