nanog mailing list archives
Re: ISPs Blocking Private Addresses?
From: "Jay R. Ashworth" <jra () scfn thpl lib fl us>
Date: Mon, 9 Feb 1998 19:11:42 -0500
On Mon, Feb 09, 1998 at 02:42:19PM -0600, Joe Shaw wrote:
Most people use what's commonly refered to as Martian filters to filter out private address spacing. It allows those ISPs to use private address space internally and not have to worry about advertising them via external routing protocols and also keeps them from accepting bogus route announcements from other providers who haven't used the filters.
There's an important distinction to be made, Joe, betwen filtering _packets_ and filtering _announcements_. Martian filters usually filter packets. What you announce, and what you send, need not have anything to do with one another.
Do the "default-less" ISPs filter private addresses or do they let routing/forwarding do the work?Default-less?
Yes: backbones whose routers have no default place to send packets not handled by some explicit route. Cheers, -- jra -- Jay R. Ashworth jra () baylink com Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "Two words: Darth Doogie." -- Jason Colby, Tampa Bay, Florida on alt.fan.heinlein +1 813 790 7592 Managing Editor, Top Of The Key sports e-zine ------------ http://www.totk.com
Current thread:
- ISPs Blocking Private Addresses? Peter Ford (Feb 08)
- Re: ISPs Blocking Private Addresses? Bradley Reynolds (Feb 08)
- Re: ISPs Blocking Private Addresses? Marc Slemko (Feb 08)
- Re: ISPs Blocking Private Addresses? Richard Yoo (Feb 08)
- Re: ISPs Blocking Private Addresses? Eric M. Carroll (Feb 09)
- Re: ISPs Blocking Private Addresses? Joe Shaw (Feb 09)
- Message not available
- Re: ISPs Blocking Private Addresses? Jay R. Ashworth (Feb 09)
- Message not available