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What does @ mean in a hostname in DNS configuration?

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14

3

I'm creating new DNS records in our DC (Windows Server 2016) and I bump into zones where there are a lot of records that do not have a regular hostname, only an "@".

We are using scopes and policies, new Windows Server 2016 features for DNS configuration.

I know that one can use "*" for wildcards in hostnames, but I don't know the meaning of "@".

domain-name-system windows-server-2016

share|improve this question

edited 14 mins ago

Dave M

4,34982428

asked Feb 21 at 15:07

jaskjask

86111

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "registers"? Is that a valid term or would entries or records be better? We're talking about resource records (RRs)...
  
  – Matthew Elvey
  Feb 23 at 2:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @MatthewElvey I think you are right, entries or records sounds better than "registers".
  
  – jask
  Feb 24 at 12:28
  

  
  
  
  

add a comment | 

14

3

I'm creating new DNS records in our DC (Windows Server 2016) and I bump into zones where there are a lot of records that do not have a regular hostname, only an "@".

We are using scopes and policies, new Windows Server 2016 features for DNS configuration.

I know that one can use "*" for wildcards in hostnames, but I don't know the meaning of "@".

domain-name-system windows-server-2016

share|improve this question

edited 14 mins ago

Dave M

4,34982428

asked Feb 21 at 15:07

jaskjask

86111

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "registers"? Is that a valid term or would entries or records be better? We're talking about resource records (RRs)...
  
  – Matthew Elvey
  Feb 23 at 2:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @MatthewElvey I think you are right, entries or records sounds better than "registers".
  
  – jask
  Feb 24 at 12:28
  

  
  
  
  

add a comment | 

I'm creating new DNS records in our DC (Windows Server 2016) and I bump into zones where there are a lot of records that do not have a regular hostname, only an "@".

We are using scopes and policies, new Windows Server 2016 features for DNS configuration.

I know that one can use "*" for wildcards in hostnames, but I don't know the meaning of "@".

domain-name-system windows-server-2016

share|improve this question

edited 14 mins ago

Dave M

4,34982428

asked Feb 21 at 15:07

jaskjask

86111

share|improve this question

edited 14 mins ago

Dave M

4,34982428

asked Feb 21 at 15:07

jaskjask

86111

share|improve this question

edited 14 mins ago

Dave M

4,34982428

asked Feb 21 at 15:07

jaskjask

86111

edited 14 mins ago

Dave M

4,34982428

edited 14 mins ago

Dave M

4,34982428

asked Feb 21 at 15:07

jaskjask

86111

asked Feb 21 at 15:07

jaskjask

86111

2 Answers
2

active

oldest

votes

28

If the name for a domain (or zone) is "example.com.", then an @ record indicates that the name for the DNS record is also "example.com."

In the GUI for a Microsoft Windows Server DNS Service, this is (or at least has been for a long time) called "Same as parent folder".

Normally the name used for a DNS record indicates everything before the name of the zone (commonly called the "domain name"). So if you enter a record named "server01" in a DNS zone called "example.com.", then the full record is "server01.example.com." If you want to enter a record where the full record is just "example.com" (which is necessary for a lot of things, like MX records), then you enter an @ in many DNS systems to tell the DNS server to respond to requests for "example.com." with the data you add to the record in question.

share|improve this answer

edited Feb 21 at 15:46

answered Feb 21 at 15:13

Todd WilcoxTodd Wilcox

2,42621428

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  The example.com is actually shortened example.com. – in DNS server configuration example.com becomes example.com.example.com., because without the tailing dot it's relative to the $ORIGIN, which could be referred with the @.
  
  – Esa Jokinen
  Feb 21 at 15:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks a lot!! Now I understand better how it works.
  
  – jask
  Feb 21 at 21:24
  

  
  
  
  

add a comment | 

17

For what I could find in the RFC, it stands for

@               A free standing @ is used to denote the current origin.

Source: https://tools.ietf.org/html/rfc1035

Hope it helps

share|improve this answer

answered Feb 21 at 15:20

Fran GimenezFran Gimenez

1735

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for the reference.
  
  – jask
  Feb 21 at 21:25
  

  
  
  
  

add a comment | 

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28

If the name for a domain (or zone) is "example.com.", then an @ record indicates that the name for the DNS record is also "example.com."

In the GUI for a Microsoft Windows Server DNS Service, this is (or at least has been for a long time) called "Same as parent folder".

Normally the name used for a DNS record indicates everything before the name of the zone (commonly called the "domain name"). So if you enter a record named "server01" in a DNS zone called "example.com.", then the full record is "server01.example.com." If you want to enter a record where the full record is just "example.com" (which is necessary for a lot of things, like MX records), then you enter an @ in many DNS systems to tell the DNS server to respond to requests for "example.com." with the data you add to the record in question.

share|improve this answer

edited Feb 21 at 15:46

answered Feb 21 at 15:13

Todd WilcoxTodd Wilcox

2,42621428

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  The example.com is actually shortened example.com. – in DNS server configuration example.com becomes example.com.example.com., because without the tailing dot it's relative to the $ORIGIN, which could be referred with the @.
  
  – Esa Jokinen
  Feb 21 at 15:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks a lot!! Now I understand better how it works.
  
  – jask
  Feb 21 at 21:24
  

  
  
  
  

add a comment | 

28

If the name for a domain (or zone) is "example.com.", then an @ record indicates that the name for the DNS record is also "example.com."

In the GUI for a Microsoft Windows Server DNS Service, this is (or at least has been for a long time) called "Same as parent folder".

Normally the name used for a DNS record indicates everything before the name of the zone (commonly called the "domain name"). So if you enter a record named "server01" in a DNS zone called "example.com.", then the full record is "server01.example.com." If you want to enter a record where the full record is just "example.com" (which is necessary for a lot of things, like MX records), then you enter an @ in many DNS systems to tell the DNS server to respond to requests for "example.com." with the data you add to the record in question.

share|improve this answer

edited Feb 21 at 15:46

answered Feb 21 at 15:13

Todd WilcoxTodd Wilcox

2,42621428

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  The example.com is actually shortened example.com. – in DNS server configuration example.com becomes example.com.example.com., because without the tailing dot it's relative to the $ORIGIN, which could be referred with the @.
  
  – Esa Jokinen
  Feb 21 at 15:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks a lot!! Now I understand better how it works.
  
  – jask
  Feb 21 at 21:24
  

  
  
  
  

add a comment | 

If the name for a domain (or zone) is "example.com.", then an @ record indicates that the name for the DNS record is also "example.com."

In the GUI for a Microsoft Windows Server DNS Service, this is (or at least has been for a long time) called "Same as parent folder".

Normally the name used for a DNS record indicates everything before the name of the zone (commonly called the "domain name"). So if you enter a record named "server01" in a DNS zone called "example.com.", then the full record is "server01.example.com." If you want to enter a record where the full record is just "example.com" (which is necessary for a lot of things, like MX records), then you enter an @ in many DNS systems to tell the DNS server to respond to requests for "example.com." with the data you add to the record in question.

share|improve this answer

edited Feb 21 at 15:46

answered Feb 21 at 15:13

Todd WilcoxTodd Wilcox

2,42621428

share|improve this answer

edited Feb 21 at 15:46

answered Feb 21 at 15:13

Todd WilcoxTodd Wilcox

2,42621428

answered Feb 21 at 15:13

Todd WilcoxTodd Wilcox

2,42621428

answered Feb 21 at 15:13

Todd WilcoxTodd Wilcox

2,42621428

17

For what I could find in the RFC, it stands for

@               A free standing @ is used to denote the current origin.

Source: https://tools.ietf.org/html/rfc1035

Hope it helps

share|improve this answer

answered Feb 21 at 15:20

Fran GimenezFran Gimenez

1735

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for the reference.
  
  – jask
  Feb 21 at 21:25
  

  
  
  
  

add a comment | 

17

For what I could find in the RFC, it stands for

@               A free standing @ is used to denote the current origin.

Source: https://tools.ietf.org/html/rfc1035

Hope it helps

share|improve this answer

answered Feb 21 at 15:20

Fran GimenezFran Gimenez

1735

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for the reference.
  
  – jask
  Feb 21 at 21:25
  

  
  
  
  

add a comment | 

For what I could find in the RFC, it stands for

@               A free standing @ is used to denote the current origin.

Source: https://tools.ietf.org/html/rfc1035

Hope it helps

share|improve this answer

answered Feb 21 at 15:20

Fran GimenezFran Gimenez

1735

@               A free standing @ is used to denote the current origin.

share|improve this answer

answered Feb 21 at 15:20

Fran GimenezFran Gimenez

1735

answered Feb 21 at 15:20

Fran GimenezFran Gimenez

1735

answered Feb 21 at 15:20

Fran GimenezFran Gimenez

1735