Re: NSPs and filters

[Paul Ferguson <pferguso () cisco com>]

FYI, this type of ingress filtering has been documented in
draft-ferguson-ingress-filtering-02.txt.

- paul

At 09:44 PM 07/11/97 -0400, Jon Lewis wrote:

> Why is it that the NSPs I've encountered refuse to do any sort of sanity
> filtering on their customer connections?  i.e. If UUNet knows that FDT has
> only 205.229.48/20 and 208.215.0/20, why should they let me send traffic
> through their network with random source addresses?
>
> FDT has been the target of forged source address UDP attacks for the past
> 2 days.  It's all being stopped at our router that takes our UUNet T1, but
> the extra T1 traffic is causing UUNet's usually unreliable network to be
> even less reliable, and we've lost connectivity to UUNet several times
> this evening.
>
>  5 minute input rate 1326000 bits/sec, 318 packets/sec
>  5 minute output rate 469000 bits/sec, 286 packets/sec
>
> PUNet suppost says there's nothing they can do, and that I should talk to
> their security people about buying a firewall for FDT on monday...like a
> firewall on our side of the T1 is going to do us a lot of good....
>
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