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Old 04-10-2011, 03:00 PM   #1
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What does the flags[DF] in the output of tcpdump stand for...

Here's the output of tcpdump
21:29:38.028294 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84)
I understand that flags are for the 6 tcp control bits. So I could assume that 'F' is for fin? What does the 'D' stand for? Or does it stand for fin? It doesn't make sense this is the first packet out when pinging a domain.
Old 04-10-2011, 03:02 PM   #2
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Oh wait that's an IP packet not a TCP packet, ah ok. Those flags specify fragmentation. DF for Don't fragment. My mistake I was thinking TCP.


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