RFC 1034:DOMAIN NAMES - CONCEPTS AND FACILITIES
RFC-Ref

CNAME


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... CNAME ...
... CNAME ...
... domain system provides such a feature using the canonical name (CNAME) RR. A CNAME RR ...
... (CNAME) RR. A CNAME RR identifies its owner name as an alias, and ...
... name in the RDATA section of the RR. If a CNAME RR is present at a node, no other data should be ...
... canonical name and its aliases cannot be different. This rule also insures that a cached CNAME can be used without checking with an authoritative server for other RR types. ...
... CNAME RRs cause special action in DNS software. When a name server ...
... fails to find a desired RR in the resource set associated with the domain name, it checks to see if the resource set consists of a CNAME record with a matching class. If so, the name server ...
... record with a matching class. If so, the name server includes the CNAME record in the response and restarts the query ...
... domain name specified in the data field of the CNAME record. The one exception to this rule is that queries which match the CNAME ...
... CNAME record. The one exception to this rule is that queries which match the CNAME type are not restarted. ...
... USC-ISIC.ARPA IN CNAME C.ISI.EDU C.ISI.EDU IN ...
... RRs would be returned in the response to the type A query, while a type CNAME or * query should return just the CNAME. ...
... while a type CNAME or * query should return just the CNAME. ...
... ARPA. Of course, by the robustness principle, domain software should not fail when presented with CNAME chains or loops; CNAME chains should be followed and CNAME ...
... domain software should not fail when presented with CNAME chains or loops; CNAME chains should be followed and CNAME loops signalled as an error. ...
... CNAME chains or loops; CNAME chains should be followed and CNAME loops signalled as an error. ...


... The answer to the query, possibly preface by one or more CNAME RRs that specify aliases ...
... A name error indicating that the name does not exist. This may include CNAME RRs that indicate that the original query ...
... If the data at the node is a CNAME, and QTYPE doesn't match CNAME, copy the CNAME ...
... node is a CNAME, and QTYPE doesn't match CNAME, copy the CNAME RR into the answer section ...
... CNAME, and QTYPE doesn't match CNAME, copy the CNAME RR into the answer section of the response, change QNAME to the canonical ...
... of the response, change QNAME to the canonical name in the CNAME RR, and go back to step 1. ...
... we are looking for is the original QNAME in the query or a name we have followed due to a CNAME. If the name is original, set an authoritative name error in the ...
... resolver section of this memo) to answer the query. Store the results, including any intermediate CNAMEs, in the answer section of the response. ...


... to address translation is an alias when it finds the CNAME RR. If possible, the alias condition ...
... restarts the query at the new name when it encounters a CNAME. However, when performing the general function, the resolver should not pursue aliases when the CNAME ...
... CNAME. However, when performing the general function, the resolver should not pursue aliases when the CNAME RR matches the query type. This allows ...
... alias is present. For example, if the query type is CNAME, the user is interested in the CNAME RR itself, and not the ...
... For example, if the query type is CNAME, the user is interested in the CNAME RR itself, and not the RRs at the name it points to. ...
... step 2. c. if the response shows a CNAME and that is not the answer itself, cache the CNAME ...
... CNAME and that is not the answer itself, cache the CNAME, change the SNAME to the canonical name in the CNAME ...
... CNAME, change the SNAME to the canonical name in the CNAME RR and go to step 1. ...
... search is restarted. If the response contains a CNAME, the search is restarted at the CNAME ...
... If the response contains a CNAME, the search is restarted at the CNAME unless the response has the data for the canonical name or if the CNAME ...
... CNAME unless the response has the data for the canonical name or if the CNAME is the answer itself. ...


... USC-ISIC.ARPA. CNAME C.ISI.EDU. 73.0.0.26.IN-ADDR.ARPA ...
... Answer | USC-ISIC.ARPA. 86400 IN CNAME C.ISI.EDU. | | C.ISI.EDU. 86400 IN A 10.0.0.52 | ...
... Answer | USC-ISIC.ARPA. 86400 IN CNAME C.ISI.EDU. | +---------------------------------------------------+ Authority ...
... QNAME=USC-ISIC.ARPA, QTYPE=CNAME ...
... Answer | USC-ISIC.ARPA. 86400 IN CNAME C.ISI.EDU. | +---------------------------------------------------+ Authority ...
... Because QTYPE=CNAME, the CNAME RR itself answers the query ...
... Because QTYPE=CNAME, the CNAME RR itself answers the query, and the name server ...



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