North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: UUNet Routing SNAFU
On Wed, Oct 08, 1997 at 07:39:52PM -0700, David Carmean wrote: > > I installed the ACL Sean posted back in December of '95, updated by > changes he posted in June of '96. Is that list still reasonable? I'm pretty sure that is the version that filters >=207 at /19 (instead of /18 which is where he initially put the filter). However, keep in mind that the registries have been allocating space out of old class A space, which all versions of his filter I've seen _will_ block. So, depending on your policy you would want to add: access-list xxx permit ip 62.0.0.0 0.255.255.255 0.0.0.0 255.255.255.0 Do that for 24/8, 62/8 and any other blocks that the IANA has released to a registry (I think Dorian mentioned 63/8 and 64/8 as well). Of course, if you want to filter on /19 then your mask will be a little different. Of course, one can just do what Randy suggested and filter all class A space at /19 and be done with it. Alec -- +------------------------------------+--------------------------------------+ |Alec Peterson - [email protected] | Erols Internet Services, INC. | |Network Engineer | Springfield, VA. | +------------------------------------+--------------------------------------+
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