PCI 5:

• Many vulnerabilities and malicious viruses enter the network via employees’ email activities. Anti-virus software must be used on all email systems and desktops to protect systems from malicious software.

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PCI-5.1 Deploy anti-virus mechanisms on all systems commonly affected by viruses (e.g. PC’s and servers).

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PCI-5.2 Ensure that all anti-virus mechanisms are current, actively running, and capable of generating audit logs.

--Mdpeters 10:18, 7 July 2006 (EDT)