How common is it for authoritative DNS servers to not respond to queries for zones they are not authoritative for (instead of returning REFUSED)?
How common is it? Do you have any figures? Or do you know of servers serving popular zones exhibiting this behavior?
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Like German Telekom does it with their "you have reached nxdomain, use our browser search" interception?
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I was referring to authoritative servers, not lying resolvers.
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After a test of Alexa Top 100, it seems: * timeout for lame delegations seem common in China (tianya.cn, http://weibo.com , 360.cn) * the most common answer (besides REFUSED) is returning SERVFAIL for lame delegations (UltraDNS does it)
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