RSC is accessible on the Server's hostname, but it still not accessible over rconnect.companyName.com
I've added the A record to point to the Servers IP.
This is a fantastic question. When you think about how network traffic travels, you will have a couple of pieces to iron out issues on:
User's browser types DNS name
DNS name resolves to an IP address
IP address is accessible to the user
User visits a particular port on the server (http = 80, https = 443, RSC default = 3939, etc.)
Port is accessible to the user (firewall, etc.)
Traffic reaches the Connect server and RStudio Connect responds
My suspicion off-hand is that the DNS name is having trouble or you need to visit the 3939 port (by default). That port can be changed via the Http section of the configuration, etc.
For testing from a command line (where you can get a bit more diagnostics), I would use things like:
If firewalls or proxies are blocking your traffic, oftentimes you will end up with a timeout from the user connecting to the service.
I hope that helps!! If you continue to have issues here, definitely reach out to our support team at support@rstudio.com! We are happy to help you get Connect up and running in your environment!