Reverse bastion architecture enables secure remote support by inverting traditional inbound access—customers initiate outbound tunnels to a central bastion host rather than exposing infrastructure to inbound connections. The bastion, deployed as an EC2 instance with Apache Guacamole gateway in a private subnet behind WAF and NLB, brokers multi-protocol sessions (SSH, RDP, VNC) while Secrets Manager stores credentials and MFA/SSO enforces identity verification. Multiple tunnel agents (Reverse SSH, WireGuard, Frp/Ngrok) from customer sites establish persistent outbound connections, eliminating firewall rules for inbound access and reducing attack surface. This pattern solves the compliance and security challenge of granting remote access without opening inbound ports, implementing least-privilege access with full session audit logging and SIEM integration. Fork this diagram on Diagrams.so to customize tunnel protocols, add additional identity providers, or adapt the VPC topology for your multi-tenant support environment.