I can't connect to the S3 bucket

[Jose Manuel Valseca Echevarria]

Good afternoon. I have a barebones copying service that dumps the copies onto an S3. For security reasons this machine cannot go out to the internet so the connection is made through an aws endpoint.
I have already read in the documentation that the plugins droplet does not work with this kind of configuration so in the /etc/host I have taken over the domain and the ip but I still get this failure:

Jmsg Job=*System* type=4 level=1646127158 bareos-sd-file: ERROR in backends/droplet_device.cc:111 error: src/conn.c:316: do_connect: Timed out connecting to server 52.218.56.216:80 after 5 seconds

If you see it keeps resolving the public ip of s3.amazonaws.com but as much as I look I have no idea why it does it since all the files are well configured and the /etc/hosts is well set.

Can you think of a solution?

thanks