Hello Sujoy,
Thank you for your message.
From the documentation, I came to know that for the Internet ID connection to work, at least one combination of port numbers must be open/allowed in the firewall'soutbound rules on the Viewer side.
That is correct.
In order to allow access, our company firewall will also require the IP address (along with the port number) that the software uses to connect.
Use the DNS name server.rutils.com and/or the IP address it resolves to 70.38.38.43.
Hope that helps.