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

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Message-ID: <4E4E558E.5050905@odu.neva.ru>
Date:	Fri, 19 Aug 2011 16:22:38 +0400
From:	Dmitry Butskoy <buc@...sz.so-cdu.ru>
To:	unlisted-recipients:; (no To-header on input)
CC:	netdev@...r.kernel.org
Subject: Re: Traceroute and "ping" sockets: some questions

David Miller wrote:
>> - Are there any plans to implement some "rate control" (maybe
>> - sysctl-configurable too), to restrict unprivileged users to send icmp
>> - echoes too fast (ie. faster than 200 ms -- the current ping(8)
>> - restriction)?
>>      
> 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 ping, we normally receive icmp replies, hence it is 
bidirectional crap. Which was not present before.

Besides that ping(8) is normally present in the system even if C 
development is not installed (ie. user cannot build its spam software at 
the host etc...)

Regards,
Dmitry
http://www.fedoraproject.org/wiki/DmitryButskoy
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