Date: Wed, 6 May 1998 16:38:57 -0700 (PDT) From: Doug White <dwhite@gdi.uoregon.edu> To: Clod Baldrick <baldrick@rmsq.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Bizarre routing problem Message-ID: <Pine.BSF.3.96.980506163658.6723C-100000@gdi.uoregon.edu> In-Reply-To: <3550C84D.3302EAE@rmsq.com>
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On Wed, 6 May 1998, Clod Baldrick wrote: > Doug White wrote: > > Hm. Try building a kernel with bpfilter and run tcpdump on the afflicted > > machine(s), then ping each other and see what you're getting. > > I can't take down the FreeBSD box to boot a new kernel at the moment (it's > in use), but I ran tcpdump on the Linux box. (I'm taking out the packets > from corsair because that's where I'm logged in from.) > > lancaster# tcpdump -i eth0 host tomcat and not src corsair > tcp > tcpdump: listening on eth0 > > tomcat$ ping lancaster > PING lancaster (130.13.21.91): 56 data bytes > ^C > --- lancaster ping statistics --- > 4 packets transmitted, 0 packets received, 100% packet loss > > And after ^C-ing the tcpdump on lancaster: > 0 packets received by filter > 0 packets dropped by kernel Okay, that helps quite a bit -- we know that the packets aren't getting there. Now the question is if they are being sent and if they are, where are they going?? I *really* need to see this from tomcat's point of view. Try to find a quiet moment and sneak a reboot in. While you're at it check the routing tables and arp tables and make sure nothing silly's happened to the linux box's entries, ie now it points into space. Also check that no one has swiped the linux box's ip address. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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