Looker domain allowlist does not show user password

[s_mehar]

Hi,

I try to access to sql server behind public ip

I created a user attribute to hide the password, when I put the domain allowlist as the ip of my sql server . I get error

Host/port x.x.x.x:1433 not allowed for password attribute "test" with domain whitelist "x.x.x.x:1433" Field: password.

the password works without the user attribute. it is only when the looker tries to retrieve it from the user attribute, I get the error.

Is it because the ip is not in the right format? I don't have a domain name , I have only Ip.

Why does this happen? 

Is it because the ip is not with the right format? I dont have domain name , I have only Ip.

Why this happen?