Re: "broadcast ping" message

John Polstra <[email protected]>
Newsgroups gmane.os.freebsd.devel.mobile
Organization Polstra & Co., Seattle, WA
Message-ID <[email protected]>
In article <[email protected]>,
Kan Cai  <[email protected]> wrote:
> 
> This is a really dumb question. When I say it doesn't work, I mean there
> is no output on the screen as you do point-to-point ping normally.
> 
> Actually it works, it won't show anything just because there is no
> ack for broadcasting. Using tcpdump can easily notice this thing.

To make a FreeBSD system respond to broadcast pings, you have to set
the sysctl variable net.inet.icmp.bmcastecho to 1.

John
-- 
  John Polstra
  John D. Polstra & Co., Inc.                        Seattle, Washington USA
  "Disappointment is a good sign of basic intelligence."  -- Chögyam Trungpa

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