network connection establish and firefox browser

[naive2021]

@naive2021:

Or, it's the Firefox Connection Settings – <https://support.mozilla.org/en-US/kb...ttings-firefox>.

check the setting, i do not use proxy. only activate "Enable DNS over HTTPS" .

[hcvv]

Hm, I am also not sure what it is. It looks as if DNS works, else FF would have complained about not being able to resolve www.google.com.

[dcurtisfra]

3- i only know how to setup opensuse and use it for daily use(graphic, office, video editor, a little bit some small code and internet) so i do not know a lot about system management.

Hmmm – I take it that, this means that, we can't ask you to trace the Network traffic with a tool such as Wireshark.

• Which means that, if possible, can you please drop some tcpdump output on <https://paste.opensuse.org/>.
• The trace we need is (file name is “test_google”) –

 # tcpdump -vv host www.google.com > test_google

What you do is, start the “tcpdump” trace and then, with an empty Firefox cache, type “www.google.com” into the Firefox address field and, hit return.
When the Firefox display has completed, type <Ctrl-C> in the Konsole window and, drop the text file named “test_google” into the openSUSE Paste and then, tell us the Paste URL pointing to your trace file.

[naive2021]

Hmmm – I take it that, this means that, we can't ask you to trace the Network traffic with a tool such as Wireshark.

• Which means that, if possible, can you please drop some tcpdump output on <https://paste.opensuse.org/>.
• The trace we need is (file name is “test_google”) –

 # tcpdump -vv host www.google.com > test_google

What you do is, start the “tcpdump” trace and then, with an empty Firefox cache, type “www.google.com” into the Firefox address field and, hit return.
When the Firefox display has completed, type <Ctrl-C> in the Konsole window and, drop the text file named “test_google” into the openSUSE Paste and then, tell us the Paste URL pointing to your trace file.

make fast search about Wireshark and tcpdump (first time hear about them). find amazing next article (about tcpdump)
https://opensource.com/article/18/10/introduction-tcpdump?fbclid=IwAR3_MmKnsGlNyyUKtG1pV6iB9vgYqOb7waXN479WrUDBA8XP_d-lnFazmJQ

1- i try the code with google and facebook in normal case to see the results how should be in normal, but both did not send any information (empty file)

tcpdump -vv host www.google.com > test_google

2- so i try next code(also did not work):

tcpdump -i any -c15 host www.google.com > test_google_working

3- try same code with another host (opensuse.org & opensource.com), it work.

Note: all the above test done where the browser is work and show the all websites without any problems.

also it first time know about <https://paste.opensuse.org/> , can i ask about the advanced of share results on it vs inside the post.

now i will search more for "Wireshark", and try use it.

thanks for advance

[karlmistelberger]

sorry english my second languge so i will make problem as flowchart(sequence of process).

next sequence did not work:
1- turn on wifi.
2- click on firefox browser.
3- wait until connection establish.
4- try search or see website.
5- results: give me error message.

next sequence work good:
1- turn on wifi.
2- wait until connection establish.
3- click on firefox browser.
4- try search or see website.
5- results: work good.

I haven't seen errors since a long time. Even stopping the network doesn't cause Firefox to display an error message:

erlangen:~ # systemctl stop systemd-networkd.service    
Warning: Stopping systemd-networkd.service, but it can still be activated by: 
  systemd-networkd.socket 
erlangen:~ #

I stopped the network while typing this post. Upon clicking "Priview Post" the network restarts in the background without further ado:

erlangen:~ # systemctl status systemd-networkd.service  
● systemd-networkd.service - Network Configuration 
     Loaded: loaded (/usr/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: disabled) 
     Active: active (running) since Sun 2022-02-20 09:57:30 CET; 4min 48s ago 
TriggeredBy: ● systemd-networkd.socket 
       Docs: man:systemd-networkd.service(8) 
   Main PID: 27358 (systemd-network) 
     Status: "Processing requests..." 
      Tasks: 1 (limit: 4915) 
        CPU: 47ms 
     CGroup: /system.slice/systemd-networkd.service 
             └─27358 /usr/lib/systemd/systemd-networkd 

Feb 20 09:57:30 erlangen systemd[1]: Starting Network Configuration... 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: eth0: Link UP 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: eth0: Gained carrier 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: lo: Link UP 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: lo: Gained carrier 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: Enumeration completed 
Feb 20 09:57:30 erlangen systemd[1]: Started Network Configuration. 
Feb 20 09:57:32 erlangen systemd-networkd[27358]: eth0: DHCPv4 address 10.0.0.24/24 via 10.0.0.138 
erlangen:~ #

More: https://en.opensuse.org/Network_Management_With_Systemd

[naive2021]

I haven't seen errors since a long time. Even stopping the network doesn't cause Firefox to display an error message:

erlangen:~ # systemctl stop systemd-networkd.service    
Warning: Stopping systemd-networkd.service, but it can still be activated by: 
  systemd-networkd.socket 
erlangen:~ #

I stopped the network while typing this post. Upon clicking "Priview Post" the network restarts in the background without further ado:

erlangen:~ # systemctl status systemd-networkd.service  
● systemd-networkd.service - Network Configuration 
     Loaded: loaded (/usr/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: disabled) 
     Active: active (running) since Sun 2022-02-20 09:57:30 CET; 4min 48s ago 
TriggeredBy: ● systemd-networkd.socket 
       Docs: man:systemd-networkd.service(8) 
   Main PID: 27358 (systemd-network) 
     Status: "Processing requests..." 
      Tasks: 1 (limit: 4915) 
        CPU: 47ms 
     CGroup: /system.slice/systemd-networkd.service 
             └─27358 /usr/lib/systemd/systemd-networkd 

Feb 20 09:57:30 erlangen systemd[1]: Starting Network Configuration... 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: eth0: Link UP 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: eth0: Gained carrier 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: lo: Link UP 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: lo: Gained carrier 
Feb 20 09:57:30 erlangen systemd-networkd[27358]: Enumeration completed 
Feb 20 09:57:30 erlangen systemd[1]: Started Network Configuration. 
Feb 20 09:57:32 erlangen systemd-networkd[27358]: eth0: DHCPv4 address 10.0.0.24/24 via 10.0.0.138 
erlangen:~ #

More: https://en.opensuse.org/Network_Management_With_Systemd

make search about your first code (to find how start the network after stop it), and find tutorial that start with show the current status of systemd-networkd, so i run next code (without & with sudo):

sudo systemctl status systemd-networkd
sudo systemctl status systemd-networkd.service

the results:
Unit systemd-networkd.service could not be found.

so i go to yast, find "systemd-networkd" not installed. but "NetworkManager" are installed.

[karlmistelberger]

make search about your first code (to find how start the network after stop it), and find tutorial that start with show the current status of systemd-networkd, so i run next code (without & with sudo):

sudo systemctl status systemd-networkd
sudo systemctl status systemd-networkd.service

the results:
Unit systemd-networkd.service could not be found.

so i go to yast, find "systemd-networkd" not installed. but "NetworkManager" are installed.

From https://en.opensuse.org/Network_Mana...d#Installation

Leap-15-3:~ #  zypper se -is systemd-network  
Loading repository data... 
Reading installed packages... 

S  | Name            | Type    | Version              | Arch   | Repository 
---+-----------------+---------+----------------------+--------+------------------------------------------------------------- 
i+ | systemd-network | package | 246.16-150300.7.36.1 | x86_64 | Update repository with updates from SUSE Linux Enterprise 15 
Leap-15-3:~ #

If not installed on your machine, install it:

Leap-15-3:~ # zypper install systemd-network 
Loading repository data... 
Reading installed packages... 
'systemd-network' is already installed. 
No update candidate for 'systemd-network-246.16-150300.7.36.1.x86_64'. The highest available version is already installed. 
Resolving package dependencies... 
Nothing to do. 
Leap-15-3:~ #