Hi Samuel,
On Tue, 2020-10-27 at 01:58 -0700, Samuel Sieb wrote:
On 10/26/20 7:44 AM, Michael J. Baars wrote:
> I'm writing a client and server program for cluster computation. I noticed that
nmap sees a specific port as open on Fedora Server and as filtered on Fedora
> Workstation when the server is running and sees this port as closed on Fedora Server
and as filtered on Fedora Workstation when the server is not running.
You don't say which port, so it makes it impossible to give you useful
advice.
The exact ports are of no importance :)
> While looking into the firewalld configuration I found that Fedora Workstation and
Fedora Server have one major difference their configuration files:
>
> <port protocol="udp" port="1025-65535"/>
> <port protocol="tcp" port="1025-65535"/>
You don't say what the difference is. Which one has that and where?
These are Fedora Workstation configuration settings.
> After removing these specific lines from /etc/firewalld/zones/FedoraWorkstation.xml,
using firewall-cmd, the ports are still accessible by the client and
> server
> program.
Since you say "still", I assume you mean on the Server. You modified
the workstation config file, why would it change anything?
> Can someone please tell me how to close these ports on Fedora Workstation? And why
does nmap report the ports as filtered on Fedora Workstation and as
> open/close on Fedora Server?
What do you mean by closed? The reason they show up as filtered is
because they are blocked on Workstation and not on Server.
I might indeed have accidentally mixed the two up. Everythings works just fine now,
don't exactly know why though, perhaps a malfunctioning 'systemctl restart
firewalld'? Strange, I almost know for sure that it was the Workstation ports that
were reported as filtered.
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