Portal access error

Hi DC experts,

 

I am having error when I am accessing portal access using external network.

 

On my nslookup I came up with this.

 

nslookup 4runner.mundipharma.ph Server: 10.140.0.10 Address: 10.140.0.1053

 

Name: 4runner.mundipharma.ph Address: 10.140.0.45

 

On the other portal access it is working fine.

 

May I know your suggestion regarding on this.

 

THank you.

 

-Nathaneil