Date: Wed, 13 Sep 2017 14:20:30 +0100 From: Arthur Chance <freebsd@qeng-ho.org> To: Ernie Luzar <luzar722@gmail.com>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: what is max size of unbound local-zone domain name Message-ID: <2de990e0-78a1-a05f-8d28-42fd1aef5744@qeng-ho.org> In-Reply-To: <59B92F4B.8020400@gmail.com> References: <59B92F4B.8020400@gmail.com>
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On 13/09/2017 14:14, Ernie Luzar wrote: > Hello list; > > unbound has option to read in a file containing local-zone: records of > this format. > > local-zone: domain-name static > > What is the max domain-name size? > > Is 130 positions to large? >From RFC 1035 2.3.4. Size limits Various objects and parameters in the DNS have size limits. They are listed below. Some could be easily changed, others are more fundamental. labels 63 octets or less names 255 octets or less I.e. each part of a domain name (label) must be <= 63 bytes, the overall domain length must be <= 254 bytes. There are also character set restrictions for domain name components. -- An amusing coincidence: log2(58) = 5.858 (to 0.0003% accuracy).
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