Full Disclosure mailing list archives
Re: Odd packet?
From: Steffen Schumacher <ssch () wheel dk>
Date: Wed, 26 May 2004 19:57:01 +0200
On 26.05.2004 13:16:52 +0000, Jeff Kell wrote:
Valdis.Kletnieks () vt edu wrote:3) An amazing number of ISPs do *not* do proper ingress/egress filtering.Well, when you're cranking gigabits sometimes those little checks can become a bottleneck.
Very few customers have gig lines, and those which do, have most likely paid enough money for it that antispoofing checks is affordable for the ISP. Please remember that antispoofing is only done at the edge of the ISP net.. inside it every thing is the way it should be of course.. So I have to disagree - doing antispoofing checks doesn't cost that much in router performance vs. for instance increased routes in you routing table..
Besides, safe routing begins at home. If end-users (or endpoints) would do ingress/egress filtering, there wouldn't be a problem. I'm not so certain we should place the blame on the core backbone for passing the packets it is sent without alteration.
Sure end-users are more then welcome to help, but ISP's still have to protect customers from themselves, and from other evil customers.. But no - the core has no fault, but the ISP edge routers do if they don't do anitspoofing checks.. /Steffen
Jeff _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
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Current thread:
- Odd packet? Gregh (May 25)
- Re: Odd packet? Ron DuFresne (May 25)
- Re: Odd packet? Maarten (May 25)
- Re: Odd packet? Steffen Schumacher (May 25)
- Re: Odd packet? Maarten (May 25)
- Re: Odd packet? Valdis . Kletnieks (May 26)
- Re: Odd packet? Steffen Schumacher (May 26)
- Re: Odd packet? Jeff Kell (May 26)
- Re: Odd packet? Valdis . Kletnieks (May 26)
- Re: Odd packet? Steffen Schumacher (May 26)
- RE: Odd packet? Aditya, ALD [Aditya Lalit Deshmukh] (May 26)
- Re: Odd packet? Steffen Schumacher (May 27)
- Re: Odd packet? Steffen Schumacher (May 25)
- Re: Odd packet? Valentino Squilloni - Ouz (May 26)
- Re: Odd packet? Steffen Schumacher (May 26)
- Re: Odd packet? Mike Klinke (May 26)
- Message not available
- Re: Odd packet? Valentino Squilloni - Ouz (May 27)
- Re: Odd packet? Valentino Squilloni - Ouz (May 25)
- Re: Odd packet? Maarten (May 25)
- Message not available
- Re: Odd packet? Valentino Squilloni - Ouz (May 26)
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- RE: Odd packet? full-disclosure (May 25)