问题 I am trying to connect AWS RDS PostgreSql from PgAdmin 3. I followed the below link http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ConnectToPostgreSQLInstance.html In Security Group, I also added PostgreSQL and All traffic as below The "publicly accessible" flag was enabled (updated after Mark B's comment) I got the error from PGAdmin3 Very appreciate for any suggestion ******UPDATE******* I can connect pgAdminIII to AWS RDS successfully using home wifi, but cannot connect using