nanog mailing list archives
Re: Re[2]: SYN floods (was: does history repeat itself?)
From: Alexis Rosen <alexis () panix com>
Date: Tue, 10 Sep 1996 14:07:03 -0400 (EDT)
Alec H. Peterson writes:
Pat Calhoun writes:This is actually quite simple to implement on Dial Access Routers, and obviously this is the best place to add the filtering.Sure, that's a place to start. Except for a few problems: 1) The people doing this are not necessarily using a dialup IP connection.
True. That's why you need to filter upstream of public-access unix boxes (like our own).
2) Many of us don't have dial access routers that can handle this.
Also true. As I said before, I don't know about the Ascends, but I do know that the Xylogics boxes we use have the capability but probably not the capacity. When all ports are connected at 28.8, CPU usage can hover in the high 80% range. Adding filters would probably be a bad idea. That's why I was talking about filtering at a router just upstream from the dial-access box. FWIW, even with a thousand very busy modems, I'm pretty sure that even a small cisco is up to the job. They just don't generate all that much traffic. /a - - - - - - - - - - - - - - - - -
Current thread:
- Re[2]: SYN floods (was: does history repeat itself?) Pat Calhoun (Sep 09)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alec H. Peterson (Sep 10)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alexis Rosen (Sep 10)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alec H. Peterson (Sep 10)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alexis Rosen (Sep 10)
- Message not available
- Re: Re[2]: SYN floods (was: does history repeat itself?) Sharif Torpis (Sep 10)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alec H. Peterson (Sep 10)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alexis Rosen (Sep 10)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alec H. Peterson (Sep 10)
- Re: Re[2]: SYN floods (was: does history repeat itself?) John G. Scudder (Sep 12)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Joel Gallun (Sep 12)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Michael Dillon (Sep 12)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Alex.Bligh (Sep 12)
- Re: Re[2]: SYN floods (was: does history repeat itself?) Neil J. McRae (Sep 13)