We answer all your questions about Flex Antivirus for Plesk. If you can't find what you're looking for, contact us.
General
What is Flex Antivirus for Plesk?
Flex Antivirus is an official extension for the Plesk control panel that integrates the ClamAV engine directly into your Windows server. It provides real-time protection against viruses, trojans and malware, automatic scans and quarantine of infected files.
Is it compatible with my Plesk version?
Flex Antivirus is compatible with Plesk Obsidian 18.0 or higher on Windows servers. If you have an older version, we recommend updating Plesk before installing the extension.
Does it work on Linux?
Currently Flex Antivirus is specifically designed for Windows servers with Plesk. For Linux servers there are other antivirus solutions integrated into Plesk. We are working on a future version compatible with Linux.
What antivirus engine does it use?
We use ClamAV, the most widely used open source antivirus engine on servers. ClamAV has a signature database that is updated daily and has a detection rate of over 99%.
Why can't I find the extension in the Plesk Catalog?
The literal reason Plesk has given for denying the extension in the catalog is that it already has 2 antivirus or security tools and does not want competition between them, referring to "Sophos Anti-Virus Plesk" and "Premium Antivirus". Both antivirus solutions are focused only on email protection, whereas Flex Antivirus is developed to protect FTP, individual hosting files, Windows System, RAM Memory, compressed files and open processes in real time as well as MailEnable and SmarterMail emails.
We hope that Plesk will reconsider its decision in the future and we can see Flex Antivirus published in the catalog to facilitate installation.
Installation
How do I install the extension?
The process is automatic and takes less than 1 minute. Check our installation guide for more details.
Do I need to restart the server?
No. Installing Flex Antivirus does not require restarting the server. The extension activates automatically once installed without interrupting any service.
What requirements do I need?
You need Windows Server 2012 R2 or higher, Plesk Obsidian 18.0 or higher and administrator access to the server. An internet connection is required to download the extension and update virus signatures.
What are the minimum requirements?
For Windows Server on any 64-bit version, with CPU >= 2.0Ghz, free hard disk space >= 2.5Gb and at least RAM >= 2Gb. Although the system can run with fewer resources, we consider those described to be the minimum desirable.
License and Pricing
Is there a free version?
Yes. You can install and use Flex Antivirus for free with basic features. The free version includes manual scanning. For real-time protection and scheduled scans you need the professional license.
Is there a commitment period in the subscription?
No. You can cancel your subscription at any time without penalty. The license renews monthly and you can unsubscribe whenever you wish.
Does the license cover multiple servers?
Each license covers one Plesk server. If you need to protect multiple servers, contact us for a special volume price.
How can I pay?
We accept bank transfer and major online payment methods. Billing is monthly and you will receive an invoice for each renewal.
Features
What is real-time protection?
Real-time protection analyzes every file that is uploaded, modified or accessed on the server instantly. If a threat is detected, the file is blocked and automatically sent to quarantine before it can cause damage.
How often are signatures updated?
Virus signatures are updated automatically every day. This ensures that your server is protected against the latest threats without any action required on your part.
Is it compatible with MailEnable and SmarterMail?
Yes. Flex Antivirus (professional plan) integrates with MailEnable and SmarterMail to scan incoming and outgoing emails for viruses and malicious attachments.
Does it affect server performance?
The performance impact is minimal. ClamAV is optimized but requires at least 1GB of available RAM. Real-time analysis is designed to be efficient. Scheduled full scans run during off-peak hours to minimize impact.