RE: [cobalt-users] RAQ4R IP issue

["E.B. Dreger" <eddy+public+spam@xxxxxxxxxxxxxxxxx>]

TK> Date: Mon, 6 Jan 2003 14:45:53 +1100
TK> From: Todd Kirk


TK> The netmask is 255.255.255.0

Scary.

1. I'll say it yet again... being on a shared ethernet segment
   opens one up to all sorts of nasty problems.  If other
   customers and/or the ISP have gear in the same subnet, you
   are vulnerable.

2. Try pinging the "broken" IP addresses from a machine in the
   same subnet.  Check the ARP cache to say if ARP resolution is
   working.

I'm tempted to say they're routing you a /28 and told you the
wrong subnet mask.

Here's another test:

* Find a host in the same /24 as your IPs

* Try pinging them from the outside world and your machine.  If
  you can ping from the outside world, AND you can NOT ping from
  your machine, AND you do NOT get ARP resolution from your
  machine, your subnet mask probably is wrong.


Eddy
--
Brotsman & Dreger, Inc. - EverQuick Internet Division
Bandwidth, consulting, e-commerce, hosting, and network building
Phone: +1 (785) 865-5885 Lawrence and [inter]national
Phone: +1 (316) 794-8922 Wichita

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