We are trying to add a new member in a replica set that are on different location and different data-center. For EG: We are having 3 member replica set on US region and we need to add a member and arbiter on aws. We will be having 5 node with PSSSA. There is no any issue with connectivity we are able to ping and telnet all 5 server from US region to aws and vice-versa. When we try to add the member it is showing as "startup" instead of "startup2" and data is also not syncing from US region data center to aws server.
MongoDB Version: 4.0.14
Check your AWS node firewall! ;-)
You need to open a port for that node's own external IP address. This because node tries to connect itself, using that external address and if rules don't allow connection from that IP address to that same IP address, node cannot make the required connection.