[LINK] DNS outage?

Stilgherrian stil at stilgherrian.com
Wed Jul 29 09:33:48 AEST 2009

On 29/07/2009, at 9:19 AM, Jan Whitaker wrote:
> I went back to the link that started this discussion, what, 2 days
> ago?, and did another traceroute just now. It still ends up at
> Telstra Brisbane. Does that mean that domain is still blocked?

No, it just means ping is bocked. Traceroute uses ping. Pings don't  
always get allowed through any more. Indeed, many networks actively  
block such attempts to do reconnaissance like that, for security  
reasons, as someone said earlier. Telstra is, in general, one of them.

Indeed, I tend to agree with that sort of network decision. On the  
Internet, you're only responsible for the operation of your own  
network and how it connects to your peers. What happens inside someone  
else's network -- which includes the backbone links -- is not your  
problem and none of your business.


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