Here we find Satan presenting himself before God and being directed to consider the righteous man Job. Indeed Job and his family were under God's special protection, and Satan could not harm them, because God himself had erected a wall against those devices Satan might use to attack them. Surely we are meant to see a connection between Job's faithful daily prayers for his loved ones and the Lord's hedge of protection. Let's look at some of the biblical data. From the standpoint of the one intent on doing evil the hedge acts as a barrier to prevent his progress.
Hedges block the progress of evil.
The agency of God's protecting hedge is often the work of angelic ministers. In praying for a hedge of protection we must remember that it is God doing the protecting, not our prayers. I am uncomfortable with the approach of those who directly challenge and rebuke demonic spirits. It seems safer to use the approach of the archangel Michael in his dispute with the devil. Another danger in this matter of praying a hedge is that we will come to see it as some kind of magical incantation.