Dokku, ufw and ipv6

I would like to install Dokku in my Ubuntu 16.04 LTS Linode.

There is little documentation about installing and configuring Dokku at Linode. I found some related to DigitalOcean.

I am wondering whether the reported issues with IPv6 on Digital Ocean and Docker are also on Linode: http://dokku.viewdocs.io/dokku/getting- … italocean/">http://dokku.viewdocs.io/dokku/getting-started/install/digitalocean/

One of the first things I would do once created a Linode is configuring a firewall, as suggested by Linode documentation:

https://www.linode.com/docs/security/se … our-server">https://www.linode.com/docs/security/securing-your-server

https://www.linode.com/docs/security/fi … l-with-ufw">https://www.linode.com/docs/security/firewalls/configure-firewall-with-ufw

However Connection Timeout issues have been reported while using Dokku in conjunction with ufw: http://dokku.viewdocs.io/dokku/getting- … eshooting/">http://dokku.viewdocs.io/dokku/getting-started/troubleshooting/

See the very last Symptom and suggested solution.

The appalling suggested solution is to completely disable ufw.

What instead would you suggest to do?