To Validate FQDN using nslookup

[shaik siddik]

I have a requirement like i need to validate fqdn field on the catalog form which is string type.

EX: www.google.com - need to show true

www.sqrfgtt.com - need to show false

I thought of using sn_dns.DNSResolver class but it is not working. 

Can we use any method or command to get nslookup results or any other way guide me please.

Thanks in advance!!

[Selva Arun]

Hi Shaik,

If I were you, I would use an on Change client script to validate the input using the regular expression.

Here’s a Basic regular expression that can be used to validate an FQDN:

^(?!-)[A-Za-z0-9-]{1,63}(?<!-)\.(?!-)[A-Za-z0-9-]{1,63}(?<!-)\.(?!-)[A-Za-z0-9-]{2,63}(?<!-)$

Please check https://regexr.com/ website for more information.

If you believe the solution provided has adequately addressed your query, could you please **mark it as 'Helpful'** and **'Accept it as a Solution'**? This will help other community members who might have the same question find the answer more easily.

Thank you for your consideration.

 Selva

[shaik siddik]

Validating the format of fqdn like it contains '.com' i have done. But they are asking to check is it valid IP or not.

if we give 'google.com' since it is a valid one it won't be issue but user will enter whatever he wants in place of google which is not valid one.