Blocking all outgoing connections

[mooktakim]

Single server deploy. Postgres is installed on the main OS (ubuntu). Rails app deployed with kamal, web and worker.
App working correctly and connecting to the database server.
The app requires connecting to external services. This does not seem to work. Times out.
I thought maybe firewall issue with the hosting provider, or on the server itself. But I am able to curl successfully when I SSH into the server. Only inside the docker it blocks all outgoing connections.

Any ideas?

❯ kamal app exec -i --reuse -r web bash
rairailsroot@148:/rails# rails c
Loading production environment (Rails 7.0.7.2)
irb(main):001:0> res = HTTParty.get "https://www.google.com"
/usr/local/lib/ruby/3.2.0/net/http.rb:1271:in `initialize': Failed to open TCP connection to www.google.com:443 (execution expired) (Net::OpenTimeout)