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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Maybe I'm misreading this but...
Doesn't this break MTU path discovery though? ------- John Fraizer (tvo) | __ _ The System Administrator | / / (_)__ __ ____ __ | The choice mailto:[email protected] | / /__/ / _ \/ // /\ \/ / | of a GNU http://www.EnterZone.Net/ | /____/_/_//_/\_,_/ /_/\_\ | Generation A 486 is a terrible thing to waste... On Wed, 14 Oct 1998, I Am Not An Isp wrote: > At 05:11 PM 10/14/98 -0400, Barry Shein wrote: > > > >The following traceroute seems to indicate, according to ARIN, that > >someone is running routers for spammers in the IANA Reserved netspace? > > [SNIP] > > >> 8 bs-jackson-gw.customer.alter.net (157.130.65.226) 107 ms 132 ms 96 ms > >> 9 172.17.80.46 (172.17.80.46) 59 ms 53 ms 44 ms > >>10 172.21.210.18 (172.21.210.18) 122 ms 96 ms 49 ms > >>11 209.149.111.17 (209.149.111.17) 53 ms (ttl=118!) 58 ms (ttl=118!) > 150 ms (ttl=118!) > > >What's going on here? > > Barry, 172.16.0.0/12 is part of RFC1918 space. There is no prohibition of > addressing routers with these addresses, and in fact I do not know of a > router that will route RFC1918 space differently than any other IP address. > (Of course, you can put in filters, and many people do, but you can filter > any addresses exactly the same way.) This is a perfectly legitimate use of > RFC1918 space, as long as those hosts expect no connectivity outside their > own network. Many people use RFC1918 on WAN links and whatnot to preserve > their ARIN allocations for "real" hosts. Read the RFC for more info. > > > -Barry Shein > > TTFN, > patrick > > I Am Not An Isp > www.ianai.net > "Think of it as evolution in action." - Niven & Pournelle >
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