Cyberattacks are increasing every day, and small to medium-sized businesses are also becoming targets. The security of your website is vital for your business continuity and customer trust. At BUZ Yazilim, we rigorously apply these 10 security steps in every project we develop.
1. HTTPS and SSL/TLS Certificate
HTTPS encrypts communication between your website and users:
- Install an SSL/TLS certificate (free with Let's Encrypt)
- Set up automatic HTTP to HTTPS redirection
- Add HSTS (HTTP Strict Transport Security) header
- Regularly check certificate expiration
2. SQL Injection Protection
SQL injection is one of the most common attack types that provides unauthorized access to your database:
- Use parameterized queries, never build queries with string concatenation
- Prefer ORM tools (Entity Framework, Dapper, etc.)
- Apply the least privilege principle to database users
- Use parameters even for stored procedures
3. XSS (Cross-Site Scripting) Prevention
XSS attacks aim to execute malicious JavaScript code in users' browsers:
- HTML encode all user inputs
- Configure the Content-Security-Policy header
- Protect cookies with HttpOnly and Secure flags
- Use a whitelist approach for rich text inputs
4. CSRF (Cross-Site Request Forgery) Protection
CSRF forces users to perform authorized actions without their knowledge:
- Use anti-forgery tokens (@Html.AntiForgeryToken() in ASP.NET)
- Enable the SameSite cookie attribute
- Request additional verification for critical operations (CAPTCHA, password confirmation)
- Implement Referer header checking
5. Strong Authentication
Weak authentication is among the most frequently exploited vulnerabilities:
- Strong password policy: Minimum 12 characters, complexity rules
- Multi-factor authentication (MFA): SMS, email, or authenticator
- Brute force protection: Account lockout or delay after failed login attempts
- Secure password reset: Time-limited, single-use tokens
6. Software and Dependency Updates
Unpatched software is exposed to known security vulnerabilities:
- Regularly update CMS, frameworks, and libraries
- Use dependency scanning tools (Dependabot, Snyk, etc.)
- Remove unused plugins and libraries
- Apply security patches immediately
7. Security Headers
HTTP security headers are a powerful defense that blocks many attack vectors:
- X-Content-Type-Options: nosniff
- X-Frame-Options: DENY or SAMEORIGIN
- X-XSS-Protection: 1; mode=block
- Referrer-Policy: strict-origin-when-cross-origin
- Permissions-Policy: Restrict unnecessary browser features
8. File Upload Security
File upload areas are an important entry point for attackers:
- Validate file type by both extension and MIME type
- Limit file size
- Store uploaded files outside the web root
- Generate random file names
- Apply antivirus scanning
9. Error Handling and Logging
Poor error handling can give attackers valuable information:
- Do not show detailed error messages in production
- Create custom error pages (404, 500)
- Track security events in a separate log file
- Regularly analyze log files and detect anomalies
10. Backup and Disaster Recovery
Despite the best security measures, attacks can occur:
- Regular backup: Back up database and file system daily
- Off-site storage: Store backups in a different location
- Backup testing: Regularly test restoration from backups
- Disaster recovery plan: Create a step-by-step action plan for post-attack
Bonus: Regular Security Audits
After implementing these 10 steps:
- Conduct penetration testing at least once a year
- Perform regular scans with free tools like OWASP ZAP
- Keep your security policies up to date
- Provide security awareness training to your team
Conclusion
Web security is not a one-time configuration but a process requiring continuous attention. By implementing these 10 steps, you can significantly protect your website against the most common cyber threats.
At BUZ Yazilim, with 19 years of experience, we develop secure web applications. Contact our expert team to evaluate your website's security.