tcpdump docker container
This simple image runs a tcpdump and writes dumps to the volume /data.
It will keep at max 10x 1GB files and overwrite the oldest one.
To capture on the hosts network interfaces, you need to run the
container by using the host networking mode:
$ docker run --net=host corfr/tcpdump
To specify filters or interface, you can use this image as you would
use tcpdump, but this will override default parameters:
$ docker run --net=host corfr/tcpdump -i eth2 port 80
If you want storage to happen on your host:
(the important part is to mount the volume using docker -v, and to write data in that volume using tcpdump -w)
$ docker run --net=host -v $PWD:/data corfr/tcpdump -i any -w /data/dump.pcap "icmp"
To analyze the stream live remotely from wireshark:
(don't forget to filter out traffic on port 22)
$ ssh root@remote-host "docker run --rm --net=host corfr/tcpdump -i any -w - not port 22 2>/dev/null" |wireshark -k -i -