netdev - Re: Traceroute and "ping" sockets: some questions

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Date:	Fri, 19 Aug 2011 17:56:26 +0400
From:	Dmitry Butskoy <buc@...sz.so-cdu.ru>
To:	netdev@...r.kernel.org
Subject: Re: Traceroute and "ping" sockets: some questions

David Miller wrote:
>>> Why limit?  He can spam with UDP socket just as easily at any rate
>>> he pleases,
>>>        
>> Yes, but most cases such UDP is "one-way" spam (until services like
>> "echo 7/udp" are enabled).
>> For icmp echo, we normally receive icmp replies, hence it is
>> bidirectional crap. Which was not present before.
>>      
> Well, replace UDP with TCP syn flood.
>    

Well.

Why then there is "net/ipv4/ping_group_range" restrictions, with default 
values (low=1, high=0) which denies this way even for root?


Regards,
Dmitry
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