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Helping out a friend today, I noticed his home network is using the
192.162.x.x IP range. (The router's address is 192.162.1.0.)
I understand that IANA RFC 1918 spec defined a few blocks of IP addresses
that could be used for private networks, including 192.168.nnn.nnn.
But I'm not clear on what the implications are of using of 192.162.x.x for
a home network. THE BIG QUESTION: Is he any more vulnerable to attack for
using 192.162.nnn.nnn than 192.168.nnn.nnn?
Diving deeper:
From the spec, it appears that one can use *any* IP block. Per the
statement, "[A]ny enterprise that needs globally unique address space is
required to obtain such addresses from an Internet registry." From that, I
infer my friend's use of 192.162.x.x does not expose him to attacks.
I note from the RFC:
[Non-private] hosts will be public and will use globally unique address
space assigned by an Internet Registry. Public hosts can communicate with
other hosts inside the enterprise both public and private and can have IP
connectivity to public hosts outside the enterprise. Public hosts do not
have connectivity to private hosts of other enterprises.
Trying to understand the context of the last statement. Who/what
"enforces" this statement?
- Dan
midrange.com
