Anti-Virus Policy
At Flexihostings, the servers are equipped with Clamav,a Linux based anti-virus software. Though virus attack have a lower incidents in Linux environments, however this is used to prevent our server from becoming a source for virus infections. In order for an effective virus removal, the following minimum requirements is applied:
1. Clamav is operated in real time on all servers.
2. The anti-virus library
definitions is updated on a regular basis.
3. Anti-virus scans is done a minimum of once per week on all servers.
Email Server Policy
Clamav is also used to provide additional protection against malware, since email with malware must be prevented from entering the network.
Email Malware Scanning
When a virus is found or malware is found, we shall delete the email and not to notify either the sender or recipient. The reason for this is that most viruses fake the sender of the email and sending them a notice that they sent a message with a virus may alarm them unnecessarily since it would not likely be true. It would simply cause an additional helpdesk call by the notified person and most likely waste system administrator's time needlessly. Notifying the recipient that someone tried to send them a virus would only alarm them needlessly and result in an increased number of helpdesk calls as well.
Blocked Attachment Types
The email server or proxy server will block all emails with attachment types that is listed below. This is because these attachment types are dangerous and contains active content which may be used to infect a computer with hostile software or because these attachment types are commonly successfully used by virus programs or malware to spread.
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Based on experience and research, there are still many users who use this type of attachment. In order to secure the network, it has become necessary to block this type of attachments.
There is no ideal policy in here. Every system administrators must choose the best method depending on the situation being experienced by their organization. Flexihostings usually use the first option and provide training to users so they know these files are blocked and what the work around is for this situation.
Anti-spam Server
For increased mail security, we actively scan every email thats is received by the main server for spamming. On our shared hosting accounts, we provide our customers with their own Spamassasin to further filter any spam that might have leaked through our main server. The updates for our spam filters is done on a monthly basis or whenever there's a new update available.