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tcpdump
Dump traffic on a network. More information: https://www.tcpdump.org.
- List available network interfaces:
tcpdump -D
- Capture the traffic of a specific interface:
tcpdump -i {{eth0}}
- Capture all TCP traffic showing contents (ASCII) in console:
tcpdump -A tcp
- Capture the traffic from or to a host:
tcpdump host {{www.example.com}}
- Capture the traffic from a specific interface, source, destination and destination port:
tcpdump -i {{eth0}} src {{192.168.1.1}} and dst {{192.168.1.2}} and dst port {{80}}
- Capture the traffic of a network:
tcpdump net {{192.168.1.0/24}}
- Capture all traffic except traffic over port 22 and save to a dump file:
tcpdump -w {{dumpfile.pcap}} not port {{22}}
- Read from a given dump file:
tcpdump -r {{dumpfile.pcap}}