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Troubleshoot FTP/Site Blockage
This guide explains why an FTP account (and most of the time the site as well) can suddenly find itself blocked.
Server Security
We use an antivirus solution on all our shared servers to fight against sending viruses via FTP and scripts.
It can detect any hacking of FTP accounts or simply the voluntary or involuntary sending of files (WordPress themes, fraudulent modules, etc.) containing lines of code or malicious inclusions.
Malicious file detected
Antivirus scans all uploaded files smaller than 1MB to prevent virus/phishing/spam script/etc from uploading. and in case of detection, the password of the FTP account is automatically modified and the incriminated files on the server are locked (FTPban).
The FTP server then sends back to the FTP client a message of the type
550 Virus Detected and Removed: botnet.infomaniak.5.UNOFFICIAL
or
550 Virus Detected and Removed: winnow.botnet.ff.trojans.15900.UNOFFICIAL
If your FTP account is suddenly blocked, you will receive an email; Please follow the procedure indicated there.
We strongly advise you to clean up your site and analyze what you wanted to send to the server.
It is your responsibility to also check whether the web and CMS applications you use are up to date. We only check the most popular CMS and web applications. We remind you that the cause of most hacks comes from a lack of security in obsolete web applications or weak passwords.
To prevent your site from being hacked and blocked again, perform the following actions:
- update web applications (WordPress, Joomla, etc.) and extensions used
- remove web apps you don't use
- change the password for all your FTP accounts
- change passwords to access your web applications (WordPress, Joomla, etc.)
- change the password of users of your MySQL databases
- remove users from MySQL databases you don't use
- use a different password whenever possible
- use complex passwords with at least 8 characters
- install and use an up-to-date Antivirus (regardless of the operating system)
If your site is not working after a cleanup, it may be necessary to replace some deleted files with healthy files.
Learn more
- Manually run an antivirus scan
- Monitoring and resolving vulnerabilities in hosted scripts