The use of sound password practices is encouraged. It is also important to consider trust relationships between systems. Malicious code may be able to leverage situations where a vulnerable system is trusted by and already authenticated to a remote system. Restrict exported directories and files to the minimum required for an application. In other words, rather than exporting an entire disk, export only the directory or file needed.
Export read-only where possible.
Keep in mind that packet filtering alone may not provide complete protection. Malicious code can enter a network through portable code downloaded from web sites or through email containing portable code or executable file attachments. In the case of a tool like network.vbs, packet filtering may be most effective against preventing the exit of malicious packets from your network, thus preventing malicious code like network.vbs from spreading from your site to others. We thank Abe Singer and the San Diego Supercomputer Center for contributions to this Incident Note. Using encryption We strongly urge you to encrypt sensitive information sent by email.