I applied online.After 2 days received a phone screening call, passed the round 1. HR scheduled for round 2 (technical round)- I passed it. HR scheduled for round 3 (The hiring manager)- kinda passed it. he acknowledged it in the interview. 2 days later I received a rejection email. Even though, this position's 90% responsibility is handling firewall devices. that's it. my security background is different from it. so, its reasons for rejection.