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This article mainly explains "how to ensure the security of the Web server". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to ensure the security of the Web server".

Maintaining the security of Web server is one of the most thankless tasks in information security. You need to find a balance between conflicting roles, allowing legitimate access to network resources while preventing vandalism.

You may even consider double authentication, such as RSA SecurID, to ensure a high degree of trust in the authentication system, but this may not be practical or cost-effective for all website users. Despite such conflicting goals, there are six steps to help secure the Web server.

Use separate servers for internal and external applications

Assuming that the organization has two separate types of network applications, services for external users and services for internal users, these applications should be carefully deployed on different servers. Doing so can reduce malicious users from breaking through external servers to gain access to sensitive internal information. If you do not have deployment tools available, you should at least consider using technical controls (such as handling isolation) so that internal and external applications do not involve each other.

Use a separate development server to test and debug applications

Testing applications on a separate Web server sounds like common sense-it is. Unfortunately, many organizations do not follow this basic rule and instead allow developers to debug code or even develop new software on production servers. This is terrible for both safety and reliability. Testing code on a production server will cause users to encounter failures and introduce security vulnerabilities when developers submit untested and vulnerable code. Most modern version control systems, such as Microsoft's Visual SourceSafe, help automate the coding / testing / debugging process.

Review website activities and store logs securely

Every security professional knows the importance of maintaining server activity logs. Since most Web servers are public, it is important to audit all Internet services. Auditing helps you detect and combat attacks, and enables you to troubleshoot server performance failures. In an advanced security environment, make sure your logs are stored in a physically secure location-the safest (but most inconvenient) technique is to print the logs as soon as they are generated and create paper records that cannot be modified by the intruder, provided the intruder does not have physical access. You may want to use electronic backup, such as logging into a secure host and encrypting it with a digital signature to prevent logs from being stolen and modified.

Train developers for reliable security coding

Software developers are committed to creating applications that meet business needs, but often ignore that information security is also an important business requirement. As a security professional, it is your responsibility to train developers on security issues that affect Web servers. You should let developers understand the security mechanisms in the network, make sure that the software they develop does not violate these mechanisms, and conduct conceptual training, such as memory leak attacks and handling isolation-which go a long way in coding and generating secure applications.

Patch the operating system and Web server

This is another common sense, but it is often overlooked when administrators are overwhelmed by other tasks. Security bulletins, such as those issued by CERT or Microsoft, remind people of how often software vendors release fixes for certain security vulnerabilities. Tools such as Microsoft's Software upgrade Service (SUS) and RedHat's upgrade service help automate this task. In short, once the vulnerability is published, if you don't fix it, it will be discovered and exploited sooner or later.

Scan using application software

If you can afford it, you may consider using an application scanner to verify the internal code. Tools like Watchfire's AppScan help ensure that there are no vulnerabilities in the code in the production environment. Remember, be aware of safety. A well-designed Web server structure should be based on a sound security policy. Implementing these six methods will help you build a solid foundation.

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