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Netcup now includes a free Firewall Layer for all their G12 vServers
Here's the blog post about it.
The firewall is available for all netcup server products from Generation 12 onwards and can be configured per server with immediate effect. The firewall is already activated by default for new orders. For existing servers (ordered before December 9, 2025), the firewall must be activated once in the SCP.
You can define up to 500 active rules per server and per public network interface in the firewall. Please note, however, that some rules are already predefined by default, for example to prevent email spamming such as netcup Mail block (default policy). You can remove these at any time after activation. For example, outgoing traffic on port 25 (SMTP) is blocked by default. This measure serves as a protective mechanism against outgoing e-mail spam. If you want to operate your server as a mail server, you can remove this rule manually at any time. In this case, however, make sure that your email configuration is complete and correct to avoid blocking by third-party providers or blacklists.
Once activated, this is how it looks like
Comments
I only have a G9.5 RS1000 server.
Hi,
they did not offer a firewall feature by default before?!
I have this feature on all my VPS/RS G11* machines as well, so it’s not something unique to the new G12 servers.
*except my VPS Piko G11s
Just had some time to play with it, and I really like that you can add and remove firewall policies and rules via their REST API.
That opens up the option to create scripts that, for example, open port 22 on a server for a specific IP/subnet when you need access, and close it afterwards. Or even grant a customer or user access to a specific port directly from your software.
Yeah that's something they lacked compared to Hetzner. Now they have it too, however their UI is not as simple as Hetzner