How do I stop firewall to diagnose application connection problem

English Network/Internet
1

Hello,

One of my app can’t connect properly on my opensuse OS, while other machines with other linux/windows OSes are fine with the same app.

I wonder if it’s the susefirewall blocking it. I have tried disabling firewalld in the services and rebooted but it still can not connect.

Any tip on how to diagnose why this app says it can’t connect?

Thanks.

2

Since you signalled with the prefix that you’re using Leap 42.3, you’re probably using SuSEfirewall2 and not firewalld.

systemctl status SuSEfirewall2

If necessary, you can stop it with

sudo systemctl stop SuSEfirewall2

and start it again with

sudo systemctl start SuSEfirewall2
3

Which app/service? Too vague to be able to give an advice here. The more details you can provide the better.

4

Sorry, I meant OpenSUSE 15.0. It was a mistake I labeled 42.3.

Steam friend/Chat can’t connect while steam itself can connect and the game is also to play.

5

In that case, use

sudo systemctl stop firewalld

to stop the firewall.

6

I’m not that familiar with Steam, but this might be helpful with respect to ports…

https://support.steampowered.com/kb_article.php?ref=8571-GLVN-8711

7

Prefix changed.

8

Disabled the firewall but it still can’t connect. Don’t know what to do. Other machines with other linux distro and windows10 are all fine behind the same home network.

9

If you upgraded you may still be set to run SuSEfirewall2 but thing are changing to use firewalld so beset to determine exactly what is running. after a boot show


systemctl status SuSEfirewall2
and
systemctl status firewalld
10 
~> systemctl status SuSEfirewall2
Unit SuSEfirewall2.service could not be found.
~> systemctl status firewalld
**●** firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: disabled)
   Active: **active (running)**
     Docs: man:firewalld(1)
 Main PID: 1630 (firewalld)
    Tasks: 2 (limit: 4915)
   CGroup: /system.slice/firewalld.service
           └─1630 /usr/bin/python3 -Es /usr/sbin/firewalld --nofork --nopid
11

Re; your first question.

Then stop it either using systemctl commands to stop and disable, or with YaST > System > Services Management.

12

I’ve tried it in the first post.

13

Well, you tried and I assume that that worked and thus your firewall is off now.

Wasn’t that what you asked for?