# VirtFusion Docs > Documentation for VirtFusion, virtualization management software for the hosting industry. This file contains links to documentation sections following the llmstxt.org standard. ## Table of Contents - [Admin IP Restrict](https://docs.virtfusion.com/administration/admin-ip-restrict.md): It's possible to restrict admin area access to a specific set of IP addresses. Administration of this feature is only available via CLI on the cont... - [Backup Manager](https://docs.virtfusion.com/administration/backup-manager.md): The Backup Manager provides automated and on-demand backups for virtual servers. It supports incremental, differential, and full backups with multi... - [Quick Admin Setup](https://docs.virtfusion.com/administration/quick-admin-setup.md): To get you setup quickly, the following steps are required. - [Reverse DNS](https://docs.virtfusion.com/administration/reverse-dns.md): Both modes give the same end user experience, however, manual mode will be a request to an administrator to update the reverse DNS entries manually. - [Server Backups](https://docs.virtfusion.com/administration/server-backups.md): VirtFusion supports user level backups. The current implementation supports on demand and scheduled. - [Trusted Hosts](https://docs.virtfusion.com/administration/trusted-hosts.md): Setting your trusted hosts is a great security measure because it helps prevent cache poisoning and phishing attacks. By explicitly defining which ... - [FAQ](https://docs.virtfusion.com/faq.md): This issue is usually caused by the UFW firewall on the hypervisor. The fix is pretty simple with a one time only command. - [Fix Outdated Installation](https://docs.virtfusion.com/fix-outdated.md): :::info - [Change the Control Server Domain](https://docs.virtfusion.com/guides/change-control-domain.md): Changing your control server domain is straightforward. You'll need SSH access to your control server to proceed. - [Cloning a Server (VM)](https://docs.virtfusion.com/guides/clone-a-server.md): VirtFusion is designed primarily for service providers, where server cloning is not typically part of regular workflows. As such, cloning a server ... - [Protecting the Control Server with Cloudflare](https://docs.virtfusion.com/guides/cloudflare.md): Make sure VirtFusion has a valid SSL certificate per the installation instructions and enable the `Full (strict)` option for SSL/TLS in Cloudflare. - [Multiple Control Server Domains](https://docs.virtfusion.com/guides/control-domains.md): Replace `DOMAIN2.COM` with your domain. - [Custom ISO](https://docs.virtfusion.com/guides/custom-iso.md): VirtFusion 3.1+ supports custom ISO URLs for end users. Custom ISO's will be streamed from a remote server (not - [Custom Icons](https://docs.virtfusion.com/guides/custom-template-icons.md): You have the ability to add up to 20 of your own icons (logos) for use in operating system templates and groups. - [Debian 11 Backports](https://docs.virtfusion.com/guides/debian-backports.md): ```shell - [DHCP](https://docs.virtfusion.com/guides/dhcp.md): VirtFusion has the ability to run a DHCP server on each hypervisor in a cluster to serve the primary IPv4 of virtual servers. This is ideal if you ... - [Disaster Recovery](https://docs.virtfusion.com/guides/disaster-recovery.md): VirtFusion 2.3+ supports DR (backup/restore) to minimize downtime and data loss in the event of a disaster. - [Elevate](https://docs.virtfusion.com/guides/elevate.md): VirtFusion 4.1+ supports the new Elevate functionality. When you elevate a server, it will allow you to make changes to the server without making t... - [Server Event Hook Examples](https://docs.virtfusion.com/guides/event-hooks/hypervisor/server-examples.md): **Hook Filename**: `server-before-boot_php_0001_fix-rhel-libvirt.event` - [Server Event Hooks](https://docs.virtfusion.com/guides/event-hooks/hypervisor/server.md): All server hook points have access to the full server object. The object may differ between servers, so it's wise to - [About Event hooks](https://docs.virtfusion.com/guides/event-hooks/overview.md): Event hooks allow you to run custom code or actions when events occur in VirtFusion. - [Custom Favicon](https://docs.virtfusion.com/guides/favicon.md): if you have an unbranded license replacing the default favicon is easy, but you can't just replace the existing one, You are required to create a c... - [Hypervisor Assets](https://docs.virtfusion.com/guides/hypervisor-assets.md): Starting from version 5.1, VirtFusion allows the configuration of asset sets on a per-hypervisor basis. This feature is especially useful for offer... - [Importing KVM Servers](https://docs.virtfusion.com/guides/importing-servers.md): VirtFusion uses the industry standard [cloud-init](https://cloudinit.readthedocs.io/en/latest/) and [guest agent](https://wiki.qemu.org/Features/Gu... - [IPv6 Route Blocks](https://docs.virtfusion.com/guides/ipv6-route-blocks.md): IPv6 Route Blocks allow the assignment of a /128, /127 or /126 subnet with a larger IPv6 subnet. - [Keeping VirtFusion Up to Date](https://docs.virtfusion.com/guides/keeping-up-to-date.md): How to keep the VirtFusion services up to date. - [Localization](https://docs.virtfusion.com/guides/localization.md): VirtFusion 2.3 introduces partial support for various languages. - [Mailouts](https://docs.virtfusion.com/guides/mailouts.md): A Mailout allows you to send an email message to multiple recipients at once. It’s commonly used for maintenance - [Moving the Control Server](https://docs.virtfusion.com/guides/moving-the-control-server.md): :::warning - [Optimizing Windows Deployment](https://docs.virtfusion.com/guides/ms-windows.md): These hypervisor level settings will be used by a Windows template when a Windows operating system is deployed. - [NAT](https://docs.virtfusion.com/guides/nat-setup.md): VirtFusion supports NAT IPv4 addressing in conjunction with native IPv6. This allows you to have a single IPv4 address per hypervisor and manage po... - [NAT Provider Native IPv6 Setup](https://docs.virtfusion.com/guides/nat-v6.md): Hetzner supply a `/64` IPv6 subnet as default with their servers, but you will need to split it into smaller subnets before you can assign IPv6 to ... - [Network Filtering (IP Anti-Hijacking)](https://docs.virtfusion.com/guides/network-filtering.md): Since version 3.0, VirtFusion has built in native bridge network filtering. - [PHP Upgrade](https://docs.virtfusion.com/php-upgrade.md): How to upgrade the control server php version. - [Server Provisioners](https://docs.virtfusion.com/guides/provisioners.md): A Server Provisioner is a script that is executed during the initial setup of a virtual server. - [Self Service](https://docs.virtfusion.com/guides/self-service.md): Self Service allows end users to build and destroy virtual servers within a set of defined limits. - [Server Migration](https://docs.virtfusion.com/guides/server-migration.md): VirtFusion 3.0+ supports two types of server migration, **Live** and **hybrid**. - [System Backup](https://docs.virtfusion.com/guides/system-backup.md): :::caution VERY IMPORTANT! - [Task Queue Configuration](https://docs.virtfusion.com/guides/task-queue.md): The default queue system uses the local relational database to store pending tasks where background workers will collect the tasks and process them... - [Webhooks](https://docs.virtfusion.com/guides/webhooks.md): VirtFusion webhooks can be used to automatically send data in real-time when certain events occur. - [Control Server](https://docs.virtfusion.com/installation/control-server.md): Control server installation instructions. - [Hypervisor](https://docs.virtfusion.com/installation/hypervisor.md): Hypervisor installation instructions. - [Bridged Hypervisor Mac Restricted](https://docs.virtfusion.com/installation/networking/hypervisor-debian-network-bridge-mac.md): Hypervisor installation instructions MAC address restricted bridged networks. - [Open vSwitch](https://docs.virtfusion.com/installation/networking/ovs.md): Open vSwitch - [OVH Debian 11 Bridged Hypervisor](https://docs.virtfusion.com/installation/provider-specific/hypervisor-debian-ovh-network-bridge.md): Hypervisor installation instructions for OVH bridged networks. - [Hetzner Routed Network](https://docs.virtfusion.com/installation/provider-specific/hypervisor-hetzner-routed-subnet.md): Routed configuration for Hetzner IPv4 subnets. - [Ceph RBD](https://docs.virtfusion.com/installation/storage/ceph-rbd.md): Ceph RBD - [Lightbits](https://docs.virtfusion.com/installation/storage/lightbits.md): Lightbits - [Remote Filesystem](https://docs.virtfusion.com/installation/storage/remote-filesystem.md): Remote Filesystem - [StorPool](https://docs.virtfusion.com/installation/storage/storpool.md): StorPool - [BillingServ](https://docs.virtfusion.com/integrations/billingserv.md): The billingServ module is a simple module that can `create`, `terminate`, `suspend` and `unsuspend` servers with a direct login bridge between Bill... - [Blesta](https://docs.virtfusion.com/integrations/blesta.md): The Blesta Direct Provisioning module is a simple module that can `create`, `terminate`, `suspend` and `unsuspend` servers with a direct login brid... - [Clientexec](https://docs.virtfusion.com/integrations/clientexec.md): The Clientexec Direct Provisioning module is a simple module that can `create`, `terminate`, `suspend` and `unsuspend` servers with a direct login ... - [HostBill](https://docs.virtfusion.com/integrations/hostbill.md): This module is built and maintained by the HostBill team. - [Paymenter](https://docs.virtfusion.com/integrations/paymenter.md): This module is built and maintained by the Paymenter team. - [Upmind](https://docs.virtfusion.com/integrations/upmind.md): This module is built and maintained by the Upmind team. - [Webhook Proxy](https://docs.virtfusion.com/integrations/webhook-proxy.md): VirtFusion webhook proxy. - [WHMCS Resource Packs](https://docs.virtfusion.com/integrations/whmcs-resource-packs.md): The WHMCS Resource Pack Provisioning module is a simple module that can `create`, `terminate`, `suspend` and `unsuspend` packs of resources with a ... - [WHMCS](https://docs.virtfusion.com/integrations/whmcs.md): The WHMCS Direct Provisioning module is a simple module that can `create`, `terminate`, `suspend` and `unsuspend` servers with a direct login bridg... - [Introduction](https://docs.virtfusion.com/docs.md): VirtFusion is Affordable, Reliable virtualization management software for the hosting industry. It's built to reduce the - [Licensing Explained](https://docs.virtfusion.com/licensing.md): VirtFusion is licensed on a per cluster basis and any hypervisors within your cluster should be configured within your license. This means you will... - [CLI](https://docs.virtfusion.com/reference/cli.md): Changing a server creation date will remove the monthly historical traffic statistics. - [Cloud-init Reference](https://docs.virtfusion.com/reference/cloudinit.md): This will set `accept-ra` to false on all Ubuntu templates using the `ens3` interface naming. - [Required Ports](https://docs.virtfusion.com/reference/ports.md): | Port | Type | Description | - [Updating](https://docs.virtfusion.com/reference/updating.md): Updating VirtFusion - [Services](https://docs.virtfusion.com/releases/services.md): Service release notes. - [Version 1.x](https://docs.virtfusion.com/releases/v1.md): Version 1 release notes. - [Version 2.x](https://docs.virtfusion.com/releases/v2.md): Version 2 release notes. - [Version 3.x](https://docs.virtfusion.com/releases/v3.md): Version 3 release notes. - [Version 4.x](https://docs.virtfusion.com/releases/v4.md): Version 4 release notes. - [Version 5.x](https://docs.virtfusion.com/releases/v5.md): Version 5 release notes. - [Version 6.x](https://docs.virtfusion.com/releases/v6.md): Version 6 release notes. - [Version 7.x](https://docs.virtfusion.com/releases/v7.md): Version 7 release notes. - [Security Advisories](https://docs.virtfusion.com/security.md): This section documents security issues that affect VirtFusion hypervisors, with patch status for the Linux distributions VirtFusion supports (Debia... - [ITScape (CVE-2026-46316)](https://docs.virtfusion.com/security/itscape.md): arm64-only KVM VM-to-host escape affecting VirtFusion's arm64 hypervisors, with patch status. - [Januscape (CVE-2026-53359)](https://docs.virtfusion.com/security/januscape.md): 16-year-old KVM VM-to-host escape affecting Intel and AMD hosts, with patch status for the distributions VirtFusion supports. - [Zapscape (CVE-2026-64561)](https://docs.virtfusion.com/security/zapscape.md): KVM VM-to-host escape affecting hypervisors, with patch status for the distributions VirtFusion supports. - [Support Access](https://docs.virtfusion.com/support/access.md): Support Access Key - [Requesting Support](https://docs.virtfusion.com/support/request.md): **1. Accurate Problem Diagnosis** - [Support Access](https://docs.virtfusion.com/support.md): Support Access Key - [PHP Compatibility](https://docs.virtfusion.com/troubleshooting/php.md): From time to time we release new versions of PHP for your hypervisor. This allows us to keep VirtFusion up to date. If you don't update your hyperv... - [Priority XML Found](https://docs.virtfusion.com/troubleshooting/priority-xml.md): ```shell - [Restarting Services](https://docs.virtfusion.com/troubleshooting/restarting-services.md): You can restart some of the system services from the commandline. Commands may differ between a control server and a - [SSL](https://docs.virtfusion.com/troubleshooting/ssl-acme.md): **Make sure the acme client is up to date**