External Access to Boxes and Ports¶
When a new project is created in Codio, a unique subdomain name is generated:
word1-word2.codio.io
where word1 and word2 are randomly generated words resulting in a unique domain name.
Recommended method for referencing box on specific port¶
It is strongly recommended that you reference a Codio box running on a specific port using the unique domain name and port number:
word1-word2.codio.io
If your PC is behind a firewall, access to external ports are often restricted. Using the unique domain name and port number allows the request to be made over port 80 so it’s not blocked by the firewall.
Using this approach allows both HTTP and HTTPS access over the full range of ports, 1024 to 9999.
Standard method for referencing box on specific port¶
You can also reference a Codio box using word1-word2-<port>.codio.io but you should be aware of the following restrictions to avoid wasting valuable time diagnosing why your browser cannot talk to the Codio box:
Port ranges are restricted to 1024 to 9499 for HTTP access.
Port ranges are restricted to 9500 to 9999 for HTTPS access.
If your PC is behind a firewall, access over non-standard ports is blocked and will fail if using
word1-word2-3000.codio.ioto reference a Codio box.
Original request header¶
The X_FORWARDED_PROTO header contains original request schema, should you need it.