Create CNAME records for a subdomain

September 21, 2020

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A canonical name record (CNAME record) is an alias for a DNS name. These records are useful when multiple services query the DNS server. The host that has an address (A) record cannot have a CNAME record.

In some cases, a Citrix ADC appliance in proxy mode requests an address record from the cache instead of the server.

Add a CNAME record by using the CLI

At the command prompt, type the following commands to create a CNAME record and verify the configuration:

- add dns cnameRec   [-TTL ] - show dns cnameRec

Example:

              > add dns cnameRec www.example.com www.examplenw.com Done > show dns cnameRec www.example.com Alias Name Canonical Name TTL 1) www.example.com www.examplenw.com 5 secs Done 
             

To remove a CNAME record for a given domain, type therm dns cnameReccommand and the alias of the domain name.

Add a CNAME record by using the GUI

Navigate to Traffic Management > DNS > Records > Canonical Records and create a CNAME record.

Cache CNAME records

Citrix ADC when deployed in a proxy mode does not always send the query for an address record to the back-end server. This happens when for a answer to a query for an address record, a partial CNAME chain is present in the cache. There are few conditions in which the ADC caches the partial CNAME record and serves the query from the cache. Following are the conditions:

Citrix ADC should be deployed in a proxy mode
后端服务器的响应a CNAME chain, for which the record type of last entry in the answer section must be a CNAME and the question type not a CNAME
The response from the back-end server cannot be a No-data or NX-Domain
The response from the back-end server has to be a authoritative response

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Create CNAME records for a subdomain

September 21, 2020

Contributed by:

September 21, 2020

Contributed by:

Create CNAME records for a subdomain

Add a CNAME record by using the CLI

Add a CNAME record by using the GUI

Cache CNAME records

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