From RFC 1034 – Domain names – concepts and facilities:
Domain names in RRs which point at another name should always point at
the primary name and not the alias. This avoids extra indirections in
accessing information. For example, the address to name RR for the
above host should be:52.0.0.10.IN-ADDR.ARPA IN PTR C.ISI.EDUrather than pointing at USC-ISIC.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 loops
signalled as an error.
So yes, it is allowed and properly written software will handle it just OK. CNAME chains aren’t however considered good practice and impose an overhead on the infrastructure.
Related Posts:
- Is a wildcard CNAME DNS record valid?
- Why can’t a CNAME record be used at the apex (aka root) of a domain?
- Should CNAME Be Used For Subdomains?
- List all DNS records in a domain using dig?
- How to include multiple domains in an spf TXT Record
- What is a glue record?
- Why is DNS failover not recommended?
- Top level domain/domain suffix for private network?
- DNS – NSLOOKUP what is the meaning of the non-authoritative answer?
- What’s the meaning of ‘@’ in a DNS zone file?
- How can I see Time-To-Live (TTL) for a DNS record?
- What type of DNS record is needed to make a subdomain?
- Why can’t MX records point to an IP address?
- Should we host our own nameservers?
- How does ServerName and ServerAlias work?
- Vagrant / VirtualBox DNS 10.0.2.3 not working
- Multiple data centers and HTTP traffic: DNS Round Robin is the ONLY way to assure instant fail-over?
- Multiple TXT fields for same subdomain
- Do SPF Records For Primary Domain apply to subdomains?
- Private IP address in public DNS
- Using prevNext Modx Addon
- :wq! command in vim
- how to set the background color of the status bar during the launching phase [duplicate]
- api-ms-win-crt-runtime-l1-1-0.dll is missing when opening Microsoft Office file [closed]
- When is K 1024 and when is it 1000?
- What is a MIME type?
- Logitech/LGHUB Lua – Loop with break
- are there dictionaries in javascript like python?
- How can I convert MP3 file to a Base64 encoded string? [closed]
- Understanding The Modulus Operator %
- Understanding the main method of python [duplicate]
- Dial pad to get phone number (with Android button images)
- TypeError: only integer scalar arrays can be converted to a scalar index with 1D numpy indices array
- How is the AND/OR operator represented as in Regular Expressions?
- TypeError: only integer scalar arrays can be converted to a scalar index with 1D numpy indices array
- Istio Ingress resulting in “no healthy upstream”
- Why is it not possible to fake an IP address?
- How to open a “-” dashed filename using terminal?
- Substring in excel
- What is a LAMP stack?
- What is a sanity test/check
- What is the difference between POST and PUT in HTTP?
- What is the difference between POST and PUT in HTTP?
- How to find Google’s IP address?
- What exactly is a VBO in OpenGL?
- What and where are the stack and heap?
- ping response “Request timed out.” vs “Destination Host unreachable”
- Authentication versus Authorization
- What is a reverse shell?
- How does npm start work? What all processes are happening in the background?
- What is an instance variable in Java?
- What is the := operator?
- What is tail recursion?
- Discord music bot not working
- What does “:=” mean in Pseudocode? [closed]
- Why am I getting error for apple-touch-icon-precomposed.png
- No results found on kibana -> discover
- What is Xpenology? Is it Linux related thing?
- Why do we need virtual functions in C++?
- What is a CSRF token? What is its importance and how does it work?
- Create blank image in Imagemagick
- Official definition of CSCI (Computer Software Configuration Item)
- How could I ping @here in Discord.py?
- Python Math – TypeError: ‘NoneType’ object is not subscriptable
- What does %>% mean in R [duplicate]
- super() in Java
- Visual List of iOS Fonts?
- What is useState() in React?
- TCP vs UDP – What is a TCP connection? [duplicate]
- How do I copy folder with files to another folder in Unix/Linux? [closed]
- ssh : Permission denied (publickey,gssapi-with-mic)
- Eclipse IDE for Java – Full Dark Theme
- Amazon Linux: apt-get: command not found
- Google Calendar API event insert always return 404 “not found” error
- ssh connect Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password)
- What’s the syntax for mod in java
- What does the Java assert keyword do, and when should it be used?
- How to get rid of the “No bootable medium found!” error in Virtual Box? [closed]
- How do I fix a “Expected Primary-expression before ‘)’ token” error?
- Using getline() with file input in C++
- STDERR? What is it? What are its common uses?
- UML Sequence diagram auto-numbering in Visual Paradigm
- Error in “MLSD” command While Connecting FTP to Server [closed]
- Java default constructor
- How do I make a delay in Java?
- Casting variables in Java
- Handling file renames in Git
- PermissionError: [Errno 13] in Python
- Why are there two ways to unstage a file in Git?
- ‘git’ is not recognized as an internal or external command
- did you specify the right host or port? error on Kubernetes
- Compiler Error “void value not ignored as it ought to be” in C programming [duplicate]
- How does Java’s PriorityQueue differ from a min-heap?
- What is archive mode in rsync?
- How to get Twitch watchtime (like streamelements)
- What is the difference between functional and non-functional requirements?
- how to use cookie-free domains (yslow)
- How to accept space in regex?
- Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException Error
- What is a Memory Heap?