I have an weird issue. I have two redash servers in AWS, second redash server uses and connects to the first redash server DB URL within some changes in the env variable and I am using same security group for both the redash servers and I have modified my SG that it allows all the traffic ingress within the security group only, But after sometime Second redash server was unable to connect to the master and redash was down. So I have to open the postgresql port explicitly with the second server ip as a inbound rule and eveyrthing works well. I wonder I am already allowing all traffic within the security group and why it doesnt work until unless I create a new inbound rule opening the posgresql port with the second server IP ..? Any idea ..?