D/DoS mitigation hardware/software needed.

Roger Marquis marquis at roble.com
Sat Jan 9 21:05:07 CST 2010


Dobbins, Roland wrote:
>> Firewalls are not designed to mitigate large scale DDoS, unlike
>> Arbors, but they do a damn good job of mitigating small scale
>> attacks of all kinds including DDoS.
> 
> Not been my experience at all - quite the opposite.

Ok, I'll bite.  What firewalls are you referring to?

>> Their CAM tables, realtime ASICs and low latencies are very
>> much unlike the CPU-driven, interrupt-bound hardware and
>> kernel-locking, multi-tasking software on a typical web server.
>> IME it is a rare firewall that doesn't fail long, long after
>> (that's after, not before) the hosts behind them would have
>> otherwise gone belly-up.
> 
> Completely incorrect on all counts.

So then you're talking about CPU-driven firewalls, without ASICs e.g.,
consumer-level gear?  Well, that would explain why you think they fail
before the servers behind them.

>I've been a sysadmin

Have you noticed how easily Drupal servers go down with corrupt MyISAM
tables?  How would S/RTBH and/or flow-spec protect against that?

Roger Marquis




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