Re: Packet Tracing (linux klog patch)

From: Andrzej Bialecki (abialat_private)
Date: Tue Feb 15 2000 - 14:32:08 PST

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    On Sat, 12 Feb 2000, Dragos Ruiu wrote:
    
    > How to use it:
    > -This patch makes the kernel log all ethernet packets to syslog.
    > -The logging happens at the default level.  I.e. normally on.
    > -You can turn logging on and off at the console by using the Magic SysRq key
    >  and a number to change the logging level.
    > -Put the interface into promiscuous mode: ifconfig eth0 promisc
    >
    > Notes:
    > -It makes a neat hotkey sniffer when using the text console too.
    > -It seems to run pretty fast. Any benchmark data welcome(-->drat_private).
    > -try a tail -f /var/log/messages for real time display
    
    I was wondering... Are you sure it doesn't overrun the kernel message
    buffer? I noticed that sometimes, when you produce tons of messages from
    within the kernel, some of them are lost.
    
    I would rather use package as NeTraMet for doing this - it also does very
    nice traffic compression in the form of flows - very fast, extremely
    flexible, uses standard libpcap, doesn't require kernel patching etc...
    
    Andrzej Bialecki
    
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