The Danger of IP Volatility, (Sat, Feb 15th)

The report highlights risks from IP address volatility in cloud and microservice environments, where stale DNS entries can cause third-party hostnames to resolve to newly assigned IPs, inadvertently directing traffic (e.g., POP3 email retrieval) to the wrong owner. The author observed Traefik logs serving default certificates for foreign .hu domains that resolved to his new IP, underscoring potential impersonation and data leakage. Recommended mitigations include promptly updating and cleaning DNS records during migrations and using mechanisms like AWS Elastic IPs to preserve address continuity.