AI in IT: How to Use ChatGPT Without Leaking Confidential Data

AI has transformed IT work, with engineers, admins, and SOC analysts using tools like ChatGPT, Claude, and Gemini daily for tasks like analyzing logs and configs. However, the practice of pasting entire logs or network configs into chat services can leak internal IPs, server names, domains, tokens, and other sensitive data. A specific incident from July 28, 2026, reported by Malwarebytes, showed that public chat shares from Claude were indexed by Google and Bing, leaking crypto keys, PII, and corporate info. Banning AI at the proxy level is ineffective; instead, companies should deploy local AI or engineers should sanitize data before sending. The author developed a Python-based, offline tool called Config Anonymizer that parses configs from Cisco, Fortinet, and others, replacing IPs and hostnames while preserving structure, with a MAX mode adding salt for additional security. The tool is open-source on GitHub.