Date: Tue, 13 Apr 2004 17:38:48 +0200 From: Joost Bekkers <joost@jodocus.org> To: Rob <nospam@users.sourceforge.net> Cc: freebsd-questions@freebsd.org Subject: Re: Interpreting ping response? (the POD lives??) Message-ID: <20040413153848.GA84919@bps.jodocus.org> In-Reply-To: <407C0260.3000100@users.sourceforge.net> References: <407BFD3D.6030206@daleco.biz> <407C0260.3000100@users.sourceforge.net>
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On Wed, Apr 14, 2004 at 12:08:16AM +0900, Rob wrote: > > Kevin D. Kinsey, DaleCo, S.P. wrote: > >can you tell me what might be happening? > > > ><kdk@eli> [/home/kdk] [16:25] > >#sudo ping -s 2048 app > >PING app.southuni.com (192.168.0.80): 2048 data bytes > >36 bytes from app.southuni.com (192.168.0.80): Destination Host Unreachable > > This may indicate that the computer is behind a firewall, that blocks > response > to ping. > If so, it wouldn't indicate the response is being blocked, but the request. If the response was being block the icmp message would go to app.southuni.com, which originated the blocked packet. > Vr HL TOS Len ID Flg off TTL Pro cks Src Dst > 4 5 00 05dc 07bd 0 0000 3f 01 1677 192.168.0.2 192.168.0.80 is the ip header of the packet to which the icmp-unreachable message is a response to. (ie your original ping request) -- greetz Joost joost@jodocus.org
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