If they use the 10.0.0.0/8 there's no harm, if they use a DOD range or another 'public' routable range, there is definitely a risk.
Gary B Gary Baribault Courriel: g...@baribault.net GPG Key: 0x685430d1 Fingerprint: 9E4D 1B7C CB9F 9239 11D9 71C3 6C35 C6B7 6854 30D1 On 05/17/2013 03:22 PM, Julius Kivimäki wrote: > Many ISPs do this, usually they hijack DoD ranges. It shouldn't cause > any issues. > > > 2013/5/17 kyle kemmerer <krkemme...@gmail.com > <mailto:krkemme...@gmail.com>> > > 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 > <http://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 > <http://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 > <http://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 > <http://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 > <http://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 > <http://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? > > > > > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ > > > > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/
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