Map makers and modders often use defaultcfg.cfg as a template for creating custom configuration scripts. They can append commands to it to enforce specific server-side settings.
The defaultcfg.cfg file is a plaintext configuration script used by the IW engine (the proprietary engine developed by Infinity Ward and used by Treyarch for Black Ops 2 ). Its primary purpose is to store the for the game. defaultcfg call of duty black ops 2