[c-nsp] Proxy arp weirdness? I'm scared!

Joseph Jackson JJackson at aninetworks.com
Tue Oct 24 17:04:34 EDT 2006


Hey all,

	I was doing a couple scans of some of our subnets today when I
noticed that if I ping a subnet address such as 10.32.0.0 I get a reply.
As shown below,

N:\>ping 10.32.0.0

Pinging 10.32.0.0 with 32 bytes of data:

Reply from 10.224.8.18: bytes=32 time=16ms TTL=253
Reply from 10.224.8.18: bytes=32 time=16ms TTL=253
Reply from 10.224.8.18: bytes=32 time=18ms TTL=253
Reply from 10.224.8.18: bytes=32 time=16ms TTL=253

Ping statistics for 10.32.0.0:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 16ms, Maximum = 18ms, Average = 16ms

N:\>



Now that 10.224.8.18 address is of course the interface on the router
for the 10.32/16 subnet.  What is really weird is that the pings only
work from certain machines.  My machine it works but a coworkers sitting
next to me doesn't.  Any ideas? 




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