[wellylug] Routing the unroutable, aka 10.0.0.0/8

Peter Lambrechtsen plambrechtsen at gmail.com
Thu Sep 25 18:23:44 NZST 2014


So Vodafone run a 10/8 network in their internodal network between the bng
and before it goes out to the imterwebs.

No major surprises there as real ips address space is expensive and no one
wants to waste any of it.. hence why .0 .1 .254 and .255 can be used more
and more over ppp links.

It doesn't surprise me at all.
On 25/09/2014 6:04 PM, "Christian Gagneraud" <chgans at gna.org> wrote:

> Hi there,
>
> I was having network problems on our local network, while troubleshooting
> I realise that from here I can access lot of address belonging to the
> (theoretically not routed) private network 10.0.0.0/8
>
> And I even found that such an address was on my route to my preferred
> French site:
>
> $ traceroute linuxfr.org
> traceroute to linuxfr.org (88.191.250.176), 30 hops max, 60 byte packets
>  1  10.64.40.2 (10.64.40.2)  0.758 ms  1.031 ms  1.295 ms
>                 ^^^^^^^^^^<-local network
>  2  smtp.canplay.org.nz (203.173.160.254)  23.084 ms  24.017 ms  24.948 ms
>  3  gi0-2-0-3.ppnzwtc01.wlg.vf.net.nz.180.109.203.in-addr.arpa
> (203.109.180.210)  26.467 ms  27.429 ms  28.389 ms
>  4  gi0-2-0-3.ppnzwtc02.wlg.vf.net.nz (203.109.180.209)  31.280 ms 31.286
> ms  31.855 ms
>  5  10.123.80.13 (10.123.80.13)  165.885 ms  166.496 ms  167.686 ms
>                   ^^^^^^^^^^^^<- ?!?
>  6  ten-0-2-0.bdr02.sjc01.ca.VOCUS.net (114.31.199.137)  168.607 ms
> 156.560 ms  216.389 ms
>  7  pos-1-0-0.bdr01.sjc01.ca.VOCUS.net.au (114.31.199.122)  216.381 ms
> 216.371 ms  216.361 ms
>
> If you look at the hostnames and the latencies, you will see that
> 10.123.80.13 is the first IP address on this path that is located in
> Australia: it's between vf.net.nz at 32ms (vodafone) and VOCUS.net at 168ms
> (Vocus Australia).
>
> If I scan 10.0.0.0/8 (using masscan [1]), says on port 80, I got a huge
> amount of "Port 80: open". These port are really open but they are not from
> an HTTP server
>
> Now if i scan the same subnet several time in a row, i don't get the same
> result, weird!
>
> The only relevant result while googling for "10.123.80.13" are from
> Vodafone forums where users complain about connection issues (typically
> reporting a traceroute).
>
> Any comments?
>
> Chris
>
> [1] https://github.com/robertdavidgraham/masscan
>
>
> --
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>
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