Firewalls
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XML Firewall Architecture and Best Practices for Configuration and Auditing
This paper has discussed the building blocks of Web services, Web services threats and security requirements,configuration standards for and XML gateway device, and assessment procedures for ensuring the adequacy of this security control. Since secur...
Troubleshooting proxy firewall connections
Investigating the TCP "handshake" between clients and servers has always been a useful way to diagnose Web server and application problems. Firewalls, however, can interfere with the normal transmission control protocol process. In this tip, ...
Firewall deployment options increase for enterprises
With a growing number firewall configuration options, companies need to spend more time and put more effort into determining how to design and deploy firewalls.
A Layer-7 Secure Security Posture
I find it interesting how guiding principles don't survive across IT disciplines. Take, for example, the concept of a security stance - your site's attitude toward security. The two fundamental postures are the secure, "default deny" ...
A Review Of Floppy-Based Firewalls And Their Security Considerations
This paper is for the user that is evaluating inexpensive perimeter firewall solutions. Several distributions of miniature Linux systems are available for repurposing old computers into valuable firewalls and routers. There are many advantages in sel...
Achieving Defense-in-Depth with Internal Firewalls
A single firewall at the Internet gateway is no longer sufficient. Currently there is a trend toward more and more outside access to the enterprise network by employees, partners, customers, and suppliers. In addition, attackers are becoming more sop...
ACK Tunneling Trojans
This paper describes another concept that I call ACK Tunneling. ACK Tunneling works through firewalls that don't apply their rule sets on TCP ACK segments. Ordinary packet filters belong to this class of firewalls while stateful firewalls do not.
Active Net Steward - Distributed Firewall
Recent studies have proven just how incorrect that assumption is. A Digital Research, Inc. reported, "Authorized users are by far a company's biggest security threat." (3) A study by the FBI and CSI showed 44% of respondents "reported...
Application Firewalls: Dont Forget About Layer 7
Web and database communication have become the prevalent communication now integrated into nearly every production system in the corporate infrastructure. Most business processes rely heavily on the confidentiality, integrity and availability of thes...
Application Level Content Scrubbers
Securing an organization's content servers (be it web, file or mail servers) was at one time the primary domain of packet filtering routers. As the Internet became the mainstream medium it is today, the attackers and their attacks became more sop...
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