Hi,

Securing an Odoo Expense application deployment for internet access involves a multi-faceted approach, combining general Odoo security best practices with the implementation of a Web Application Firewall (WAF) like Cloudflare Pro. Essential Odoo security measures include using HTTPS for encrypted traffic, enforcing strong passwords, implementing strict firewall rules, keeping Odoo updated with security patches, and setting up regular backups. Additionally, rate limiting and intrusion prevention systems like Fail2ban can help prevent brute-force and denial-of-service attacks.

While a specific, pre-built "Odoo WAF ruleset" for Cloudflare Pro is unlikely to be available, you can effectively secure your Odoo instance by configuring Cloudflare Pro with custom rules tailored to Odoo's traffic patterns. This involves understanding the typical requests and responses, writing WAF rules to filter out malicious traffic, and leveraging features like rate limiting and the OWASP ModSecurity Core Rule Set. It's also crucial to test WAF rules thoroughly to avoid blocking legitimate traffic. By combining these measures, you can create a robust security posture for your Odoo Expense application.

Hope it helps