Login screen users - hide - ?

[lejeczek via users]

Hi guys.

Is it possible to hide somehow a user from Login screen, so 
such user/account would not show up in that list of users?


many thanks, L.
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Re: Login screen users - hide - ?

[Tom Horsley]

On Fri, 8 Jul 2022 12:26:58 +0100
lejeczek via users wrote:

> Is it possible to hide somehow a user from Login screen, so 
> such user/account would not show up in that list of users?

Probably depends on the login manager. I use sddm and have
this in /etc/sddm.conf

# Comma-separated list of users that should not be listed
HideUsers=backup

In my case "backup" is a rsync only user I have for doing backups.

I'd guess other login managers have similar features, though perhaps
configured entirely differently.
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Re: Dual booting

[Michael Hennebry]

I'm going to put off dealing with the "new"
computer until I get another VGA cable.
This computer also requires a VGA cable,
which makes using the "new" one a bit of a bother.

--
Michael   henne...@web.cs.ndsu.nodak.edu
"Sorry but your password must contain an uppercase letter, a number,
a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
 --  someeecards
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Re: F36: removing systemd-resolved breaks chrony

[Petr Menšík]

On 6/5/22 17:18, stan via users wrote:

On Sat, 4 Jun 2022 16:07:12 -0400
Tom Horsley  wrote:
  

Try editing /etc/NetworkManager/NetworkManager.conf and putting
dns=none after the [main] section entry.

I have to do this in order to use dns servers other than those the ISP
provides with knot-resolver.


Not really. You can also edit your connection and add ipv4.dns IP to the 
connection. Then it would use your IP first.


nmcli c edit enp0s31f6

print ipv4.dns
set ipv4.dns 127.0.0.1
save
activate
quit

You can also set ipv4.ignore-auto-dns true to avoid autoconfigured 
addresses on that connection. It makes it possible to change it only 
per-connection.

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scale or change monitor resolution on high dpi

[Anil Felipe Duggirala]

Hello,
I have a laptop with a high dpi monitor, 4k on a 15" screen. 'Im on F36, Gnome.
I'm wondering whats the better alternative, change the resolution of the 
display or use scaling? (performance and usability)
Is there any update on fractional scaling? It didn't work last time I tried it 
(just really weird behavior, on Wayland at least).

thanks,

Anil F
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firewalld problems

[D. Hugh Redelmeier]

I updated from Fedora 34 to 36 on my gateway machine.

Computers on the LAN could no longer access the POP3 server.
Somehow some service settings got lost.

What else got lost in the transition?

NAT/forwarding no longer works.  This didn't matter because there is a
second gateway with a much faster internet connection.  Except it
mattered today because Rogers Communications internet and phone
service went out, across their service area in Canada.  When I tried
to use the gateway with F36, it would not work.

Just as a simple example, from the LAN
ping external-site
generated a "Packet filtered" response returned by the gateway.
On the other hand this worked fine:
ping gw-LAN-address
and so did
ping gw-public-address

This looks like a problem with forwarding.

googling got me this:


It proposed this:

firewall-cmd --permanent --new-policy policy_int_to_ext
firewall-cmd --permanent --policy policy_int_to_ext --add-ingress-zone 
public
firewall-cmd --permanent --policy policy_int_to_ext --add-egress-zone 
external
firewall-cmd --permanent --policy policy_int_to_ext --set-priority 100
firewall-cmd --permanent --policy policy_int_to_ext --set-target ACCEPT
firewall-cmd --permanent --zone=external --add-masquerade
systemctl restart firewalld
firewall-cmd --info-policy policy_int_to_ext
I tried this (replacing "public" with the right zone for my setup).

This isn't quite working.  tcpdumping the gateways external port, I
can see the ICMP Echo Request makes it out and an ICMP Echo Reply
comes back, but it never make it into the LAN.

Ditto for ssh.

Can anyone see what I've missed?

Where can I see "policy" stuff in the firewall GUI?  I haven't found
it.

Another oddity.  After I did the proposed firewall changes listed
above, I dumped the netfilter rules "nft -l" and compared them with
the previous dump.  There seemed to be a certain amount of
refactoring: there were separate functions for  virbr0.  Why?

I no longer have confidence in the migrated firewall config.
Is there a way to start over, as if this were a fresh installation of
Fedora 36.

I think the "policy" feature is just what I need for other problems, so it 
is great to see this addition.  It seems too sparsely documented for me to 
completely understand it.  Boy is "policly" an overused term in 
networking.
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Re: firewalld problems

[Michael D. Setzer II via users]

Had a similar issue other day. Didn't happen with Fedora 
34, but with Fedora 35 had issue.
Have a 50M connection thru my cable modem, and 
brother has a 15M connection with his TV connection. 
Have a machine that connects to Cable modem via wired 
network and to the TV network via Wifi. In past if cable 
went down, the system would use the other connection.
Usually route shows the cable connection with 100, and 
TV with 600. Power outage in area took out access to 
Cable so, it changed to 2100 metric. ping and traceroute 
would work, but browser and email would not work. Had 
to physically unplug the wired connection to get wifi to 
work. Later the cable came back up, and it was back to 
the 100 metric, but system would not use it, seemed to be 
stuck on wifi?? Rebooted machine, and it was fine.

So, 34 and before seemed to work fine with the two 
connections, and handled if either went down. 35 seems 
to have issues?? Haven't setup a 36 machine yet. Have 5 
now with 35. Route seems to show he correct metrics, so 
it should switch to using other network, but didn't. 
Notebook is only machine connected to both networks 
directly, and it has squid setup to allow machine 
connected to TV network use the faster cable modem. 
Was only down for about 2 hours, so didn't do much 
testing.



On 8 Jul 2022 at 23:38, D. Hugh Redelmeier wrote:

Date sent:  Fri, 8 Jul 2022 23:38:48 -0400 (EDT)
From:   "D. Hugh Redelmeier" 

To: users@lists.fedoraproject.org
Subject:firewalld problems
Send reply to:  "D. Hugh Redelmeier" 
, Community support for Fedora 
users 

> I updated from Fedora 34 to 36 on my gateway machine.
> 
> Computers on the LAN could no longer access the POP3 server.
> Somehow some service settings got lost.
> 
> What else got lost in the transition?
> 
> NAT/forwarding no longer works.  This didn't matter because there is a
> second gateway with a much faster internet connection.  Except it
> mattered today because Rogers Communications internet and phone
> service went out, across their service area in Canada.  When I tried
> to use the gateway with F36, it would not work.
> 
> Just as a simple example, from the LAN
>   ping external-site
> generated a "Packet filtered" response returned by the gateway.
> On the other hand this worked fine:
>   ping gw-LAN-address
> and so did
>   ping gw-public-address
> 
> This looks like a problem with forwarding.
> 
> googling got me this:
> 
> 
> It proposed this:
> 
>   firewall-cmd --permanent --new-policy policy_int_to_ext
>   firewall-cmd --permanent --policy policy_int_to_ext --add-ingress-zone 
> public
>   firewall-cmd --permanent --policy policy_int_to_ext --add-egress-zone 
> external
>   firewall-cmd --permanent --policy policy_int_to_ext --set-priority 100
>   firewall-cmd --permanent --policy policy_int_to_ext --set-target ACCEPT
>   firewall-cmd --permanent --zone=external --add-masquerade
>   systemctl restart firewalld
>   firewall-cmd --info-policy policy_int_to_ext
> I tried this (replacing "public" with the right zone for my setup).
> 
> This isn't quite working.  tcpdumping the gateways external port, I
> can see the ICMP Echo Request makes it out and an ICMP Echo Reply
> comes back, but it never make it into the LAN.
> 
> Ditto for ssh.
> 
> Can anyone see what I've missed?
> 
> Where can I see "policy" stuff in the firewall GUI?  I haven't found
> it.
> 
> Another oddity.  After I did the proposed firewall changes listed
> above, I dumped the netfilter rules "nft -l" and compared them with
> the previous dump.  There seemed to be a certain amount of
> refactoring: there were separate functions for  virbr0.  Why?
> 
> I no longer have confidence in the migrated firewall config.
> Is there a way to start over, as if this were a fresh installation of
> Fedora 36.
> 
> I think the "policy" feature is just what I need for other problems, so it 
> is great to see this addition.  It seems too sparsely documented for me to 
> completely understand it.  Boy is "policly" an overused term in 
> networking.
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++
 Michael D. Setzer II - Computer Science Instructor 
(Retired) 
 mailto:mi...@guam.net
 mailto:msetze...@gmail.com
 Guam - Wher

Re: scale or change monitor resolution on high dpi

[D. Hugh Redelmeier]

| From: Anil Felipe Duggirala 

| I have a laptop with a high dpi monitor, 4k on a 15" screen. 'Im on F36, 
Gnome.
| I'm wondering whats the better alternative, change the resolution of the 
display or use scaling? (performance and usability)
| Is there any update on fractional scaling? It didn't work last time I tried 
it (just really weird behavior, on Wayland at least).

Fractional scaling works for me.  But maybe I don't do anything
tricky.  There may be a better way, but this is what I use:

dconf write /org/gnome/mutter/experimental-features 
"['scale-monitor-framebuffer']"

Yeah, my 15.6" UltraHD notebook display is a little too high
resolution to use straight.

In less extreme cases, I adjust each browser or terminal window
as-needed, when needed.

One hopes that Gnome scaling does a better job of anti-aliasing than
running the display in a non-native resolution.  But I don't actually
know.

As an experiment, I looked at text in a Gnome Terminal on my UltraHD
15.6" display.  Without any scaling settings, each character looks
beautifully formed, even when examined through a magnifying glass.  It
is still beautiful after three or four shrinks.  Perhaps nothing is
lost just pretending the screen is FullHD.  But that's just text.

I'm sure fonts are better on Gnome Terminal than on xterm (I used that
for about 20 years).
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Re: firewalld problems

[D. Hugh Redelmeier]

| From: D. Hugh Redelmeier 

| This isn't quite working.  tcpdumping the gateways external port, I
| can see the ICMP Echo Request makes it out and an ICMP Echo Reply
| comes back, but it never make it into the LAN.

The packets on the external interface have the IP address of that
interface.  So oubound NATing is working.  I'm not sure where in
the firewall the return packets are being lost.
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Re: Network boot fails in dracut-initqueue due to nm-online wrongly pretend that the network is connected

[Francis . Montagnac]

Hi.

On Thu, 07 Jul 2022 17:16:00 +0100 Barry wrote:

>> I wonder if there is a single case where nm-online is useful :-(

> Yes there are use cases where this is needed.
> Some times network is need to complete boot in I tire before switching the
> the main disk.

Of course, but to be clearer: doing that with nm-online does NOT work.

In my case (network boot), nm-online terminates BEFORE the default gateway
is reachable. As a consequence downloading the install image
(Server/x86_64/os//images/install.img) fails.

My workaround is to replace nm-online by a loop waiting for the gateway to be
reachable.

Ref: https://bugzilla.redhat.com/attachment.cgi?id=1894842

-- 
francis
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