What is s0 stands for??
Could you please explains it.
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Ethereal and tcpdump
I captured network traffic whic includes SIP protocol in Linux system using tcpdump
tcpdump -i eth0 -w /tmpd/tcpdump.cap
I tried to open in Ethereal by applying SIP in filter.
It is not showing the full message.
It is displaying the folllwoing message
" Packet size limited during capture: sip truncated"
What command I want to execute in tcpdump to view full sip message in ethereal.
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Answers
From the man page:
-s Snarf snaplen bytes of data from each packet rather than the default of 68 (with SunOS's NIT,
the minimum is actually 96). 68 bytes is adequate for IP, ICMP, TCP and UDP but may truncate
protocol information from name server and NFS packets (see below). Packets truncated because
of a limited snapshot are indicated in the output with ``[|proto]'', where proto is the name
of the protocol level at which the truncation has occurred. Note that taking larger snapshots
both increases the amount of time it takes to process packets and, effectively, decreases the
amount of packet buffering. This may cause packets to be lost. You should limit snaplen to
the smallest number that will capture the protocol information you're interested in. Setting
snaplen to 0 means use the required length to catch whole packets.
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by: Tim_UtschigPosted on 2006-01-19 at 21:30:36ID: 15746540
tcpdump -i eth0 -s0 -w /tmpd/tcpdump.cap