CHAPTER 8: Performing Diagnostic Tests and Restarting the SonicWALL Security Appliance
To 204.71.200.74 / 80 (02:00:cf:58:d3:6a)
The SonicWALL security appliance receives SYN from LAN client.
2TCP sent on WAN [SYN]
From 207.88.211.116 / 1937 (00:40:10:0c:01:4e) To 204.71.200.74 / 80 (02:00:cf:58:d3:6a)
The SonicWALL security appliance forwards SYN from LAN client to remote host.
3TCP received on WAN [SYN,ACK]
From 204.71.200.74 / 80 (02:00:cf:58:d3:6a) To 207.88.211.116 / 1937 (00:40:10:0c:01:4e)
The SonicWALL security appliance receives SYN,ACK from remote host.
4TCP sent on LAN [SYN,ACK]
From 204.71.200.74 / 80 (02:00:cf:58:d3:6a) To 192.168.168.158 / 1282 (00:a0:4b:05:96:4a)
The SonicWALL security appliance forwards SYN,ACK to LAN client.
5TCP received on LAN [ACK]
From 192.168.168.158 / 1282 (00:a0:4b:05:96:4a) To 204.71.200.74 / 80 (02:00:cf:58:d3:6a)
Client sends a final ACK, and waits for start of data transfer.
6TCP sent on WAN [ACK]
From 207.88.211.116 / 1937 (00:40:10:0c:01:4e To 204.71.200.74 / 80 (02:00:cf:58:d3:6a)
The SonicWALL security appliance forwards the client ACK to the remote host and waits for the data transfer to begin.
When using packet traces to isolate network connectivity problems, look for the location where the
Select Packet Trace from the Diagnostic tool menu.
9Tip: Packet Trace requires an IP address. The SonicWALL security appliance DNS Name Lookup tool can be used to find the IP address of a host.
7Enter the IP address of the remote host in the Trace on IP address field, and click Start. You must enter an IP address in the Trace on IP address field; do not enter a host name, such as “www.yahoo.com”. The Trace is off turns from red to green with Trace Active displayed.
8Contact the remote host using an IP application such as Web, FTP, or Telnet.
9Click Refresh and the packet trace information is displayed.
10Click Stop to terminate the packet trace, and Reset to clear the results.
The Captured Packets table displays the packet number and the content of the packet, for instance, ARP Request send on WAN 42 bytes.
Select a packet in the Captured Packets table to display packet details. Packet details include the packet number, time, content, source of the IP address, and the IP address destination.
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