On 02/12/2018 07:12 PM, Ivan Mitev wrote:

On 02/12/2018 06:47 PM, Unman wrote:
On Mon, Feb 12, 2018 at 06:41:49PM +0200, Ivan Mitev wrote:

On 02/12/2018 06:26 PM, Unman wrote:
On Mon, Feb 12, 2018 at 12:03:46PM +0200, Ivan Mitev wrote:

On 02/12/2018 11:42 AM, Yuraeitha wrote:
On Monday, February 12, 2018 at 8:21:12 AM UTC+1, Ivan Mitev wrote:

In an effort to decrease R4's memory consumption I'm replacing the
default fedora-26 template with a customized one based on the official
minimal fedora-26 template.

I installed additional RPMs according to the documentation [1] and
everything seems to be working well, with a noticeable decrease of
memory usage. However I get the following error when opening a VM's
firewall settings gui:

"The 'work' qube is network connected to 'sys-firewall', which does not
support firewall!
You may edit the 'work' qube firewall rules, but these will not take any
effect until you connect it to a working Firewall qube."

But again, everything seems to work fine: the firewall rules are
properly enforced, there's no problem with net connectivity, the update
proxy is working, ...

There's no error message when sys-firewall is based on the default
fedora-26 template so I'm likely missing something but I don't see what. I compared the qubes rpms installed in both templates but didn't notice
anything striking. Maybe there's a flag/preference or something that
needs to be set but I don't see where.

Any ideas ?


[1] https://www.qubes-os.org/doc/templates/fedora-minimal/

It sounds odd, it usually should work changing the template. My initial thought-line on this issue goes like this, maybe it can be of use.

Is the iptable firewall package installed in the minimal template?

I'm thinking it may be iptables that is missing, since minimal templates can be used for offline purposes too, then iptables is probably not included like most other things that has been removed.

iptables is installed (that's one of the first thing I checked after I saw
the error msg).


- If Qubes tools are installed, networking works etc, and you got iptables installed already, then my thoughts are that it's likely missing system-config-*'s and the unavoidable full array of dependencies going with it.

Hmm, what are those system-config-*s you're talking about ?

- Try clone the template and essentially go berserk and not holding back, install the entire system-config- array of packages, see if networking works. If not, then either something is still missing, or firewalling has nothing to do with the system-config packages.

- If it works, then try narrow down which packages that are used for firewalling, perhaps you can reduce the amount of dependency packages being pulled if you install just the package that firewall is using.

If there aren't hardcoded changes or manual configurations made in the
default fedora-26 template then yes, installing the exact same of rpms would
in theory fix the problem. But before spending significant time on
installing a bunch of rpms and then dissecting I thought I'd ask fellow users first... Maybe the cause is obvious and I'm overlooking something.

I just want to check - you say that the firewall rules are properly
enforced, and that everything works properly EXCEPT that you get a


BTW qvm-firewall works and doesn't output any error message...

Yes, thought so - it's probably a bug in the gui code that checks
connected  netvm status. Does it happen with every connected qube?

Yes, it happens to all the vms connected to sys-firewall.

I just reverted sys-firewall's template to the default f26 and there was no more error message, so it doesn't look like a bug in the gui, something is likely missing in my customized template. Just have to find what :)

figured it out quickly this morning: in qubes-manager/settings.py the error message is displayed when the template doesn't have the 'qubes-firewall' feature.


qvm-features fedora-26-minimal qubes-firewall 1

out of curiosity I tried to find where/when this feature is set for the default fedora-26 template: there's a comment in qubes/ext/core_features.py that says '[this feature] can be freely enabled or disabled by template' but I don't understand what it's supposed to mean - whether the template automatically sets it somehow (but then how ?) or if it can be set for each template. It's probably the latter; in that case maybe the feature is set by the template's rpm postscripts (but then I couldn't find any mention of "qvm-features" in the qubes-builder-fedora repo).

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