full-disclosure - Re: My ISP is routing traffic to private addresses...

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Date: Fri, 17 May 2013 19:12:52 +0000
From: mezgani ali <handrix@...il.com>
To: kyle kemmerer <krkemmerer@...il.com>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: My ISP is routing traffic to private
	addresses...

There are many ISP that route IP traffic through networks with private
addresses, my ISP to do the same thing and has 10.0.0.0 class A addresses
routable.
May be it is a miss of IP addresses or may be a NAT that was published due
to some network need.

regards,


On Fri, May 17, 2013 at 8:08 PM, kyle kemmerer <krkemmerer@...il.com> wrote:

> So today when trying to access a device on my network (172.30.x.x range) I
> was taken to the web interface of a completely different device.  This
> baffled me at first, but after a bit of poking around, I determined that my
> ISP was actually routing traffic to these addresses.  See the trace below
>
>
> Tracing route to 172.30.4.18 over a maximum of 30 hops
>
>   1    11 ms    18 ms    19 ms  XXXXXXXXX
>   2    30 ms   178 ms   212 ms  vl4.aggr1.phdl.pa.rcn.net [208.59.252.1]
>   3    13 ms    18 ms    13 ms  tge0-1-0-0.core1.phdl.pa.rcn.net[207.172.15.50]
>
>   4    37 ms    39 ms    57 ms  tge0-0-0-2.core1.lnh.md.rcn.net[207.172.19.227]
>
>   5    35 ms    34 ms    32 ms  tge0-1-0-1.core1.chgo.il.rcn.net[207.172.19.235
> ]
>   6    42 ms    38 ms    39 ms  port-chan13.aggr2.chgo.il.rcn.net[207.172.15.20
> 1]
>   7    37 ms    39 ms    39 ms
> port-chan1.mart-ubr1.chi-mart.il.cable.rcn.net [
> 207.229.191.132]
>   8    57 ms    61 ms    53 ms  172.30.4.18
>
> Trace complete.
>
>
> So I break out nmap and do a quick scan, and find that there are thousands
> of these devices across this IP range.  Has anybody ever seen anything like
> this?  Surely this must be a mistake, right? If anybody else is using RCN
> as an ISP, can you access these addresses as well?
>
>
>
>
>
> _______________________________________________
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>



-- 
Ali MEZGANI
*N*etwork *E*ngineering/*S*ecurity
http://www.nativelabs.org/

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