tcpdump

Question

Hi
Can someone confirm me whether below tcpdump script syntax are error free for 11.5.x LTMs&nbsp;
tcpdump -envi 0.0:nnnp -s0  'host x.x.x.x and host y.y.y.y' -w /var/tmp/dc1.pcap&nbsp;
tcpdump -envi 0.0:nnnp -s0 '(host z.z.z.z or y.y.y.y or k.k.k.k or m.m.m.m) and (host h.h.h.h or i.i.i.i or s.s.s.s or t.t.t.t)' -w /var/tmp/dc2.pcap&nbsp;
Can I get more info or examples about the tcpdump command options on LTM ? &nbsp;

crodriguez · Answer

Check out this article on AskF5.com: K411: Overview of packet tracing with the tcpdump utility&nbsp;

devnullnz · Answer

You can also use dumpcap, which will save your capture in pcapng format.
e.g. rotating capture, limited to 10 x 10M files
dumpcap -i eth0 -s128 -b filesize:10000 -b files:10 -w /shared/tmp/capture.pcap -f "(host 10.1.1.2 and tcp port 80) or (host 10.1.1.10 and tcp port 443) or icmp"&nbsp;

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tcpdump

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