Yes, there is a possibility to upgrade the server configuration. Go to section "Cloud Servers" -> "Create & Manage". Choose a server and go to "Upgrade" tab. Choose the configuration you need. Upgrading is automatic and may take up to 15 minutes.
Enter your cloud server's name, choose the region, choose the appropriate Linux distribution and other options. Select «Password» in the «Authentication method» section and click «Create Cloud Server» at the bottom of the page.
You can view your OpenStack API credentials and the endpoint URL by clicking "Show credentials" button on the "Cloud Servers > Create & Manage" page in the Customer Portal.
Enter the name of your virtual machine, choose the region, in the distribution list, select Windows 2012 R2 Standard, select the desired configuration and click «Create VM» at the bottom of the page.
pfSense is an open source firewall/router computer software distribution based on FreeBSD. It is installed on a physical computer or a virtual machine to make a dedicated firewall/router for a network. It can be configured and upgraded through a web-based interface, and requires no knowledge of the underlying FreeBSD system to manage.
To access Linux-based server via an SSH-key, it is necessary to generate a key pair. The private part of the key is stored on the PC from which you connect, and the public part is placed on the Cloud Server. You can generate the key pair on your PC, place the public part in the control panel and use this key in the future. You can also generate a key at portal.servers.com. In this case, you will be given a private part of the key that is to save on your PC. Both options are considered below.