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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: traffic filtering
On Tue, 22 Jan 2002 at 12:34pm Joe Abley wrote: > > On Mon, Jan 21, 2002 at 05:53:16PM -0500, Stephen Griffin wrote: > > I'm curious about how many networks completely filter all traffic to > > any ip address ending in either ".0" or ".255". > > I heard recently that Windows 2000 will refuse to send packets > to addresses with the least-significant octet 255, if the most- > significant octet indicates the address lies in a pre-CIDR class > C. So, for example, 192.168.0.255 would be unreachable from a > windows 2000 machine, regardless of the fact that it might be > a legitimate host numbered within 192.168.0.0/23. Not true. M$ is guilty of many evil things, but not this one. -- Joseph F. Noonan Rigaku/MSC Inc. [email protected] ------------------------------------------- Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp. C:\>tracert o2 Tracing route to o2.msc.com [12.110.0.218] over a maximum of 30 hops: 1 <10 ms <10 ms <10 ms netb.msc.com [192.246.38.10] 2 <10 ms <10 ms <10 ms 172.16.16.2 3 <10 ms 10 ms <10 ms 12.124.26.249 4 <10 ms 10 ms <10 ms gbr2-p51.hs1tx.ip.att.net [12.123.134.18] 5 <10 ms <10 ms 10 ms gbr3-p40.dlstx.ip.att.net [12.122.2.97] 6 10 ms 10 ms 10 ms gbr4-p60.dlstx.ip.att.net [12.122.1.138] 7 30 ms 30 ms 30 ms gbr4-p50.dvmco.ip.att.net [12.122.2.102] 8 30 ms 30 ms 30 ms gbr1-p20.dvmco.ip.att.net [12.122.5.22] 9 40 ms 40 ms 40 ms ar1-p3110.slkut.ip.att.net [12.123.207.5] 10 40 ms 40 ms 40 ms 12.127.107.26 11 50 ms 40 ms 60 ms fw-utah.msc.com [12.110.0.130] 12 40 ms 40 ms 60 ms o2.msc.com [12.110.0.218] Trace complete. C:\>
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