All-
Please see attached link from DSL reports. It raises some very interesting questions. The first question I have is how do I block all private addressing from going out to the internet from my UTM? The following ranges would need to be blocked:
10.0.0.0/8
172.16.0.0/12
192.168.0.0/16
Currently I have a dnat rule to drop some CIDR's that was using 10.0.0.1 as a black hole so I thought. However is appears it may be going out to the internet.Oddly enough I get a response from the internet using not only 10.0.0.0/8 but on random private addresses in the 198 and 172 range. It appears some of the 10.0.0.0/8 may actually be some of verizon cisco routers.
https://secure.dslreports.com/forum/r28973061-Networking-Is-10.0.0.0-8-not-blackholed-
Thanks,
Jim
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