Pomerium Reverse Proxy
A pomerium reverse proxy sits in front of internal web apps to check user logins. It links to your single sign-on tool and checks user roles before forwarding traffic. Teams often set up this tool to replace old virtual private networks. Still, broad route rules can still give users too much control inside target apps. How a pomerium reverse proxy works The tool splits its work across four main service parts. You can run these parts together in one process or split them across servers. The fi
Reverse Proxy Security + Pomerium (Zero Trust Proxy): the complete guide
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A pomerium reverse proxy sits in front of internal web apps to check user logins. It links to your single sign-on tool and checks user roles before forwarding traffic. Teams often set up this tool to replace old virtual private networks. Still, broad route rules can still give users too much control inside target apps.
How a pomerium reverse proxy works
The tool splits its work across four main service parts. You can run these parts together in one process or split them across servers. The first part handles user login flows with your main identity provider. The second part stores user group data and session details in memory.
The third part evaluates your access rules for each incoming request. The fourth part takes outside traffic and routes it to your internal web apps. When a user tries to open an app, the system stops the request first. It redirects the browser so the user can log in with their work email.
Once the user logs in, the system checks their email and group roles. If the user matches the rule for that route, the traffic moves forward. If the check fails, the system blocks the request right at the edge. The tool also sets up encrypted links between its own parts and upstream apps.
Setting up routes and role rules
To set up routes, admins map public web addresses to internal service ports. Each route points from an outside domain name to a private app address. Admins then write rules that say which user groups can open each route. These rules check things like email domains, user groups, or device status.
Teams also set up TLS certificates so browser traffic stays encrypted in transit. Many teams use automated certificate tools to keep these keys fresh without manual work. Once the route and certificate are ready, the internal app is live for approved users. Users do not need to install extra client software just to view web pages.
For non-web protocols like SSH or database links, the setup changes quite a bit. Users must install a local helper tool on their laptop to tunnel TCP traffic. This local tool opens a port on the laptop and wraps the raw traffic. This adds extra setup steps for engineers who just want to run a query.
Reverse Proxy Security + Pomerium (Zero Trust Proxy): architecture patterns and best practices
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Where route-level checks fall short
A pomerium reverse proxy solves the problem of exposing private web apps to the internet. It keeps unauthenticated traffic away from your internal servers and removes wide network tunnels. It is a strong fit when your main goal is guarding internal web dashboards.
Still, route rules only decide who can open the front door to a service. Once a TCP tunnel or web route opens, the tool does not read database queries. It cannot tell the difference between a safe read query and a table drop. The user still logs into the database with a shared role and broad permissions.
Route checks also cannot mask sensitive fields inside the data that comes back. If a table holds emails, phone numbers, card numbers, or national IDs, raw values return. To control individual commands and rewrite sensitive fields in results, teams need deeper inspection.
Add runtime guardrails and masking beside your databases and APIs
Login rules, role grants, and CI checks govern who connects to your stack. Yet any allowed script, engineer, or AI agent still runs commands with the full scope of its role. For workloads on Postgres, MySQL, SQL Server, MongoDB, ClickHouse, Kubernetes, SSH, or internal HTTP services, hoop.dev sits beside the service as an open-source proxy, a sidecar for your database or API.
Before a query runs, hoop.dev guardrails check the statement against your rules. An AI Analyzer you configure can score intent or hold risky calls for human review. Next, hoop.dev data masking rewrites sensitive fields in responses, and each verdict is logged per listener. Explore the MIT-licensed project on GitHub.
Frequently asked questions
Does a pomerium reverse proxy replace a VPN for all workloads?
It replaces a VPN well for browser-based internal apps. For raw TCP services like databases, users still need client tools to tunnel traffic. It also does not inspect the actual database queries or shell commands inside those tunnels.
How does the system handle user sessions when roles change?
The data broker part syncs group memberships from your identity provider in the background. When an admin removes a user from a group, the policy service updates its state. The next request from that user fails the rule check and gets blocked.
Can route rules hide sensitive fields inside database query results?
No, route rules only allow or block the network link and HTTP path. They do not parse SQL responses or rewrite emails, phone numbers, or card numbers. You need a tool that understands database protocols to mask data in flight.