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Designation
Description
TCPDUMP
In order to closely monitor the network traffic, you can use the "TCPDUMP" com-
mand. Some examples of the use of this command are:
You can find detailed TCPDUMP documentation at www.tcpdump.org
Port Check
You can use this function to check the status of a port (open / not open) in connection
with an Internet or IP address.
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• -i eth0 not port 80
Displays all TCP/IP connections to the (-i) LAN (eth0) interface, except (not)
those using Port 80 (port 80) when incoming or outgoing.
• -i eth1 port 23
Displays all TCP/IP connections to the (-i) WAN (eth1) interface using Port 23
(port 23) when incoming or outgoing.
• -vvv -i eth1
Displays all traffic in verbose mode, Level3 (-vvv) on the (-i) WAN (eth1) inter-
face.
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, 2022 |
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