# tcpdump > Dump traffic on a network - 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 port `tcpdump -i {{eth0}} src {{192.168.1.1}} dest {{192.168.1.2}} and 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`