Get remote server's DNS aliases

[gsprague]

Anyone know the terminal command to get a remote server's DNS aliases?

Thanks! ;)

[tlarkin]

you can try:

scutil --dns

do you know the IP/DNS of these remote servers?

[gsprague]

Hi tlarkin,

Thank you for the reply! Yes, I know the IP addresses and or the server names. But I'm trying to get the aliases of those servers via the terminal.

Thanks!

[SirDice]

You mean the CNAME records? That's something you can't get from an IP address. You can only find the corresponding PTR record.

For example:


molly A 192.168.1.190
something CNAME molly

And

190 PTR molly


Now you can resolve both 'molly' and 'something' to 192.168.1.190. However, a reverse lookup on 192.168.1.190 will only return 'molly', not the CNAME 'something'.

The tools used to check dns are 'nslookup' and 'dig'. The latter is preferred.

dig @your_dns_server some.web.address.org
dig @your_dns_server -x 1.2.3.4

[gsprague]

I'm trying to get the server aliases not the cname. Maybe this isn't possible with the cname or IP address?

Thanks!

[SirDice]

What exactly do you mean by "server alias"?

[gsprague]

Some of our servers have other aliases or secondary names.

Basically we have a server and I'm trying to determine which servers are connecting to it. My IS team gave me a log of IPs that are connecting but I have no idea what these servers are unless I get all of the alias names.

Even with the main server names which is just a mix of letters and numbers I still have no idea what it is so I need to try and get the alias names or the secondary server names.

Thanks very much for your help it is greatly appreciated! ;)

[SirDice]

Some of our servers have other aliases or secondary names.
Those are CNAMEs.

[gsprague]

OK, so there is no way to get the secondary cname from a cname or IP?

Thanks!

[SirDice]

OK, so there is no way to get the secondary cname from a cname or IP?
Nope, sorry.