port forwarding is an unconventional setup, and inconvenient 1. you should configure a public address.
https://clear.ml/docs/latest/docs/deploying_clearml/clearml_server_aws_ec2_ami has some info and links.

for a more secure option I'd follow this guide to create a user/password environment https://clear.ml/docs/latest/docs/deploying_clearml/clearml_server_config/#web-login-authentication
and use AWS ELB to securely expose the 3 services though it.
you can then configure your client with the exposed address
web_server: "http://[expossed web address]:8080" api_server: "http://[expossed API address]:8008" files_server: "http://[expossed file address]localhost:8081"

another simple option would be our hosted SAAS at https://app.clear.ml