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Forum Discussion

VGF5's avatar
VGF5
Icon for Cumulonimbus rankCumulonimbus
Dec 30, 2016

F5 3DNS

Hi F5 professionals,   I have one quick question, can anybody ans me please ?   I am working on 3dns devices, I want to capture traffic on that device. So can we do tcpdump ?   If we can ple...
application delivery
BIG-IP DNS
Stanislas_Piro2's avatar
Stanislas_Piro2
Icon for Cumulonimbus rankCumulonimbus
Dec 30, 2016

Hi,

do you mean big-ip dns (new name of GTM (from version 9.X to 11.X), which was new name of 3DNS (before version 9.X))

Yes, you can use tcpdump with command:

tcpdump -nni any -s0 -A udp port 53 and host X.X.X.X

this will capture

  • on any interfaces (-i any)
  • without resolving host and port (-nn)
  • full packet and not only headers (-s0)
  • display on terminal out the packet content (-A)
  • with filter 
    udp port 53 and host X.X.X.X