nanog mailing list archives
Re: Who does source address validation? (was Re: what's that smell?)
From: Iljitsch van Beijnum <iljitsch () muada com>
Date: Sat, 12 Oct 2002 12:46:46 +0200 (CEST)
On Thu, 10 Oct 2002, Jared Mauch wrote: [People using RFC 1918 addresses for routers that terminate tunnels which breaks path MTU discovery when RFC 1918 source addresses are filtered elsewere.]
People number out of 1918 space primarily for a few reasons, be them good or not:
1) Internal use 2) Cost involved.. nobody else needs to telnet to my p2p links but me, and i don't want to pay {regional_rir} for my internal use to reduce costs
So use IP unnumbered.
3) "security" of not being a "publicly" accessible network.
Well then they get more security than they bargained for if their network becomes inaccessible...
With the past scare of "we'll be out of ip addresses by 199x" still fresh in some peoples memories, they in their good consience decided to also conserve ips via this method.
Current thread:
- Re: Broken PMTU (was: Who does source address validation? (was Re:what's that smell?)), (continued)
- Re: Broken PMTU (was: Who does source address validation? (was Re:what's that smell?)) Valdis . Kletnieks (Oct 09)
- Re: Broken PMTU (was: Who does source address validation? (was Re:what's that smell?)) Stephen J. Wilcox (Oct 10)
- Re: Broken PMTU (was: Who does source address validation? (was Re:what's that smell?)) Tony Rall (Oct 10)
- Re: Who does source address validation? (was Re: what's that smell?) Valdis . Kletnieks (Oct 09)
- Re: Who does source address validation? (was Re: what's that smel l?) Steve Francis (Oct 09)
- Re: Who does source address validation? (was Re: what's that smel l?) Valdis . Kletnieks (Oct 09)
- Re: Who does source address validation? (was Re: what's that smel l?) Hank Nussbacher (Oct 10)
- Re: Who does source address validation? (was Re: what's that smell?) Richard A Steenbergen (Oct 10)
- Re: Who does source address validation? (was Re: what's that smell?) Iljitsch van Beijnum (Oct 10)
- Re: Who does source address validation? (was Re: what's that smell?) Jared Mauch (Oct 10)
- Re: Who does source address validation? (was Re: what's that smell?) Iljitsch van Beijnum (Oct 12)