Any idea why requests to external IPs on weird port numbers are timing out?

Hi,

Any idea why requests to external IPs are timing out?

I am trying to proxy http requests hitting a linode compute node on which an nginx reverse proxy is installed.

The requests are incoming on ports 80/443 and are supposed to be proxied to an on premise server listening on ports 1080/10443.

The problem is that nginx connection are timeing out, when trying to call my on premise server.

Note that by calling directly my server on the 2 mentioned ports, I get a response instantly, when the url is opened in a browser windows.

When I tried to opened the same URL from the linode instance using wget, I've got the same behavior nginx was showing:

wget: can't connect to remote host (#.#.#.#): Operation timed out

Playing with the firewall outbound configurations: opening all ports or just the relevant ones, didn't helped either.

Any idea what is going on here? Something seems to be blocking those outbound requests at linode instance level.

Note that I haven't done much changes on this node, other than installing nginx.

Thanks