How does the java framework defend against denial of service attacks?

The Java framework resists denial of service attacks through the following mechanisms: Spring Security: CSRF Protection: Prevents cross-site request forgery attacks Maximum number of login attempts: Limits brute force attacks Apache Shiro: Captcha: Prevents automated and brute force attacks Session timeout: Limits session duration Time

Java Framework Against Denial of Service Attacks

A Denial of Service (DoS) attack is designed to render an application or system unusable, Thus making it inaccessible to legitimate users. Java frameworks provide important mechanisms to defend against such attacks.

Spring Security

Spring Security is a security framework for Java web applications. It provides several features to defend against DoS attacks:

// 设置最大登录尝试次数
security.addFilter(new CsrfFilter());
security.addFilter(new UsernamePasswordAuthenticationFilter(authenticationManager(), context));
security.addFilter(new ProviderManager(providers, eventPublisher));
security.addFilterAfter(new AbstractAuthenticationProcessingFilter("/login") {
    @Override
    protected void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
        attemptAuthentication(request, response);
        chain.doFilter(request, response);
    }
}, CsrfFilter.class);
security.addFilterAfter(new LogoutFilter(, "/logout"), UsernamePasswordAuthenticationFilter.class);

• CSRF Protection: This feature protects against Cross-Site Request Forgery (CSRF) attacks, in which an attacker Click on malicious links to perform unauthorized actions.
• Maximum number of login attempts: This limit prevents brute force attacks, in which an attacker attempts to gain access to an application by repeatedly guessing credentials.

Apache Shiro

Apache Shiro is another security framework for Java web applications. It provides the following features to defend against DoS attacks:

// 设置重试次数限制
ini.setSecurityManager(securityManager());
ini.setGlobalSessionTimeout(millis);
ini.setLoginUrl("/login");
ini.setSuccessUrl("/home");
ini.setUnauthorizedUrl("/unauthorized");
ini.setLogoutUrl("/logout");
ini.setRememberMeEnabled(true);

• Verification code: This feature requires users to enter a verification code before logging in, thereby preventing automated attacks and brute force attacks.
• Session Timeout: This feature limits the duration of a session, preventing an attacker from retaining a session indefinitely.

Practical Case

Consider an e-commerce application using Spring Security. The following code shows how to enable both CSRF protection and the maximum login attempts limit:

// 启用 CSRF 保护
security.csrf().disable();

// 限制最大登录尝试次数
security.maximumNumberOfAttempts(10);

By implementing these defense mechanisms, Java frameworks can effectively protect applications from denial-of-service attacks.

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