ERROR: IP 10.XX.ZZZ.YYY is blocked due to too many failed logon attempts!

I recently experienced this error while configuring  HCM and FSCM on People Tools 8.56. While configuring PeopleSoft Nodes of participating applications in HCM system (People Tools ->Integration Broker ->Gateways ->Gateway Setup properties), I was getting error on Ping Node – “PeopleSoftTargetConnector - The app server may be down. Check App server URL or Domain Password …