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Security Issues and Solutions, Part 6: Web and TCP/IP Services Security

Mar 22, 2002

📄 Contents

␡

Restricting Scripts from External Sources
HTTP Security
IP Security
Internet Browser Security
Securing RAS Servers
Securing Electronic Mail
Preventing E-Mail Security Abuses
Other TCP/IP Security Issues
End User's Responsibility
Series Postscript

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Securing Electronic Mail

Electronic mail is the lifeblood of modern organizational communication. The capability to send and receive mail messages from external sources is a common requirement. As is the case with any information from external sources, e-mail presents a host of security problems, including the following:

Flooding. The e-mail server is hammered with a large number of messages, which can result in denial of service and system crash.
Spoofing. The e-mail message has an incorrect sender name or address.
Viruses. Application attachments may contain hostile macros (for example, the ActiveX-based Melissa).
Nonrepudiation. The receiver needs to verify that the sender actually sent the message, and the sender needs to verify that the receiver got the message.

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