How to setup and use the snap version UFW in 16.04 LTS?

Question

Checking my UFW version I see its 0.35. However, I installed the Snap UFW and it is version 0.36pre-16.2.

So how do I use the snap version of UFW? Do I have to uninstall UFW 0.35 first?

I also uninstalled ufw (0.35) and then ran ufw version and got the following:

Could not use iptables. Please run:
  'sudo snap connect ufw:firewall-control ubuntu-core:firewall-control'

I tried running that but then got:

error: the required argument <snap>:<slot> was not provided.

Any ideas?

Here is output of snap interfaces:

I ran the first command and it errored. However I ran the second command without issue. Then running snap interfaces i see UFW for firewall control so that seemed to work. However when still running ufw version I get 0.35. If i uninstall ufw version 0.35 how to get the ufw snap to run? — TBoss, Jun 21, 2016 at 0:15
I just keep this link to the related bug report bugs.launchpad.net/ubuntu/+source/snap/+bug/1594644 . and deleted the answer (it is not complete) — user.dz, Jul 9, 2016 at 16:09

F1Linux · Accepted Answer · 2019-05-08 13:09:05Z

I installed UFW- no previous version was present- on Ubuntu Core 16.04 as below without issues:

sudo snap install ufw

and sudo snap interfaces confirms it's recognized:

:firewall-control                    network-manager,ufw,wifi-ap

UFW version I'm using:

sudo snap list ufw
    Name  Version  Rev  Tracking  Publisher   Notes
    ufw   0.36     296  stable    canonical✓  -

It's been a few years since you posted your issue, so maybe you ran into a bug. But as of 20190508 installing UFW installs without issue.

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