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Hmmm. I think this depends on your DNS provider. This link is broken for me: I think my ISP does not like hostnames starting with underscores.
by nzmsv 17y ago
Hmmm. I think this depends on your DNS provider. This link is broken for me: I think my ISP does not like hostnames starting with underscores.
- telemachos 17y agoInteresting. If it helps or anyone else is curious, I'm using OpenDNS.
- nzmsv 17y agoThis is really strange. None of the browsers on my machine can access this URL. But dig _why.usesthis.com returns the correct info. According to Wikipedia, the use of underscores in hostnames is illegal, but many implementations ignore this. Anyway, the interview is mirrored here: http://viewsourcecode.org/why/#7 http://viewsourcecode.org/why/#7
- vsync 17y agohttp://www.apps.ietf.org/rfc/rfc1123.html#sec-6.1.3.5 http://www.apps.ietf.org/rfc/rfc1123.html#sec-6.1.3.5 Looks like underscores are valid in /domain names/ but not in /host names/. You'll see underscores used many times for SPF records and in Microsoft's Active Directory. Also, when you use dig I'm pretty sure it manually recurses the name server hierarchy while an application will just connect to your local name server which might have its own policies.