Django iis deployment postgres

I have deployed a django app on an iis server. I'm using postgres as the database. However while connecting with the application remotely, I'm getting they following error -

Operational error..

An error has occurred: could not connect to server: No buffer space available (0x00002747/10055) is the server running on "localhost" (::1) and accepting TCP/IP connections on port 5432? could not connect to server : no buffer space avalaible (0x00002747/10055) is the server running on "localhost" (::1) and accepting TCP/IP connections on port 5432?

What could be the possible scenario: 1. Should i ask the server team to unblock port 5432 for remote access? 2. Is any other configurations required at server end?