nanog mailing list archives
Re: Lazy Engineers and Viable Excuses
From: Iljitsch van Beijnum <iljitsch () muada com>
Date: Tue, 26 Aug 2003 17:39:28 +0200
On dinsdag, aug 26, 2003, at 17:03 Europe/Amsterdam, Leo Bicknell wrote:
Now, the customer, over their two T1 transit circuits does the following:
as-path access-list 1 deny .*
neighbor verio filter-list 1 in
ip route 0.0.0.0 0.0.0.0 sprint
Should the customer have to register a route with Sprint to make this work? How does UUNet, who only received a route from Verio, know incoming packets from Sprint aren't spoofed?
You're not saying anything about outgoing route advertisements here so these questions are unanswerable.
My position is that if you want to use certain source addresses, you should announce and register the route that goes with those addresses. Expecting the whole world to forego uRPF just because that makes your life easier isn't realistic.
However, maybe we're spending too much effort on the whole source address spoofing issue, as stopping this doesn't really solve the core problem, which is how to shut up undesired incoming traffic.
Looking up the unspoofed source address in a registry and then email or phone the listed contact isn't exactly a sure fire way to do this.
<mime-attachment>
Why???
Current thread:
- Re: Lazy Engineers and Viable Excuses, (continued)
- Re: Lazy Engineers and Viable Excuses Leo Bicknell (Aug 26)
- Re: Lazy Engineers and Viable Excuses Jared Mauch (Aug 26)
- Re: Lazy Engineers and Viable Excuses Leo Bicknell (Aug 26)
- Re: Lazy Engineers and Viable Excuses Stephen J. Wilcox (Aug 26)
- Re: Lazy Engineers and Viable Excuses Matt Levine (Aug 26)
- Max TNT ping thing Geo. (Aug 26)
- Re: Max TNT ping thing Andy Johnson (Aug 26)
- Re: Max TNT ping thing Chris Adams (Aug 26)
- Re: Max TNT ping thing Andy Walden (Aug 27)
- Re: Lazy Engineers and Viable Excuses Jared Mauch (Aug 26)
- Re: Lazy Engineers and Viable Excuses Iljitsch van Beijnum (Aug 26)
- RE: Lazy Engineers and Viable Excuses Mark Borchers (Aug 26)
- Re: Lazy Engineers and Viable Excuses Haesu (Aug 26)
- Re: Lazy Engineers and Viable Excuses Richard A Steenbergen (Aug 26)
- Re: Lazy Engineers and Viable Excuses Steve Carter (Aug 26)
- Re: Lazy Engineers and Viable Excuses John Payne (Aug 26)
- Re: Lazy Engineers and Viable Excuses Leo Bicknell (Aug 27)
- Re: Lazy Engineers and Viable Excuses John Payne (Aug 27)
- Re: Lazy Engineers and Viable Excuses Stephen J. Wilcox (Aug 27)
- Re: Lazy Engineers and Viable Excuses william (Aug 28)
- Re: Lazy Engineers and Viable Excuses Joe Abley (Aug 26)