[atlas] Fwd: Issues encountered with assigning .0 and .255 as usable addresses?
Vesna Manojlovic BECHA at ripe.net
Wed Oct 24 16:59:59 CEST 2012
Hi Tore, thanks, that's an interesting idea, we'll look into it and investigate how best to set up an experiment. Regards, Vesna On 10/23/12 10:02 PM, Tore Anderson wrote: > Here's a suggestion for an Atlas experiment and subsequent RIPE Labs > article. Do a ping measurement from all the probes to the .0 and .255 > address of the same /24, plus to another control address in the same > /24, and compare success rates. > > It's particularly interesting for me as my own personal home page is > accessible at 18.104.22.168 at the moment.., > > Might also be worth checking it out for IPv6 at the same time (at least > the case where the last 64 bits are all zeroes). > > Tore > > -------- Opprinnelig melding -------- > Emne: Issues encountered with assigning .0 and .255 as usable addresses? > Dato: Mon, 22 Oct 2012 22:07:50 +0000 > Fra: Paul Zugnoni <paul.zugnoni at jivesoftware.com> > Til: nanog at nanog.org <nanog at nanog.org> > > Curious whether it's commonplace to find systems that automatically > regard .0 and .255 IP addresses (ipv4) as src/dst in packets as traffic > that should be considered invalid. When you have a pool of assignable > addresses, you should expect to see x.x.x.0 and x.x.x.255 in passing > traffic (ie. VIP or NAT pool, or subnets larger than /24). Yet I've run > into a commercial IP mgmt product and getting reports of M$ ISA proxy > that is specifically blocking traffic for an IP ending in .0 or .255. > > Any experience or recommendations? Besides replace the ISA proxy…. Since > it's not mine to replace. Also curious whether there's an RFC > recommending against the use of .0 or .255 addresses for this reason. > > > >