about udp 80,8080,0

Truman Boyes truman at suspicious.org
Wed Feb 10 05:45:03 CST 2010


On 10/02/2010, at 5:01 AM, Jeffrey Lyon wrote:

> If you don't need UDP, disallow it to your entire network or to the
> /xx where such is applicable. We have basic filters like this with our
> carriers upstream and have prevented several Gbps of traffic from ever
> hitting our filters as a result.
> 
> Jeff

While this may be suitable in small networks, this type of heavy handed control will simply cause you more problems in the long run. There are just too many applications that use UDP to restrict it to exceptions. UDP isn't the problem, it's just a method of the attack. 

Truman


> 
> 2010/2/9 Michael Holstein <michael.holstein at csuohio.edu>:
>> 
>>>    What does application use 8.8080,0 port for the proper purpose?
>>> 
>>> 
>> 
>> I've seen newer BitTorrent clients do this (UDP is supported, and the
>> port can be arbitrary).
>> 
>> 
>> Cheers,
>> 
>> Michael Holstein
>> Cleveland State University
>> 
>> 
> 
> 
> 
> -- 
> Jeffrey Lyon, Leadership Team
> jeffrey.lyon at blacklotus.net | http://www.blacklotus.net
> Black Lotus Communications of The IRC Company, Inc.
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