Jan 4, 2017

Tutorial tcpdump

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tcpdump -i eth0  -s 1500 port not 22
tcpdump -nn -i eth0  -s 1500 port not 22 and port not 53 and not arp
tcpdump -i eth0 port not 22 and host 1.2.3.4
tcpdump -i eth0> -s 65535 -w mycap.pcap  (Older versions of tcpdump truncate packets to 68 or 96 bytes. If this is the case, use -s to capture full-sized packets:)
tcpdump -s 0 port ftp or ssh -i eth0 -w mycap.pcap (-s 0 will set the capture byte to its maximum i.e. 65535, after this capture file will not truncate.)
tcpdump -nn -i eth0 -s 0 port 1900 & => Display IP address instead of name
tcpdump -A -nn -i eth0 -s 0 port 1900 => -A: display the packet data
tcpdump -i eth0 -s 0 port not 22
tcpdump -w mycap.pcap -i eth0 -s 0

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