StrongDM Enterprise Implementation Guide for Zero Trust Access

Overview

StrongDM is a control plane for privileged and operational access that brokers connections to infrastructure such as Linux servers, RDP hosts, databases, Kubernetes clusters, and internal web applications. Enterprises adopt it to replace VPN-centric access with identity-aware, audited, least-privilege access that integrates with SSO, MFA, SCIM, and infrastructure policy.

Its core value is separating user authentication and authorization from direct network reachability. Users authenticate to StrongDM through an identity provider, receive policy-based access to specific resources, and connect through relays or gateways that keep target systems off the public internet. This reduces credential sprawl, improves session visibility, and simplifies onboarding and offboarding.

Architecture

StrongDM deployments typically include a SaaS control plane, local clients, one or more relays, and registered resources. The control plane stores policy, identities, audit events, and connection metadata, while relays provide the data path into private environments.

[User Device with sdm client] ---- 1. SSO auth ----> [StrongDM Control Plane]
[StrongDM Control Plane] ---- 2. policy + certs ----> [User Device with sdm client]
[User Device with sdm client] ---- 3. encrypted session ----> [StrongDM Relay]
[StrongDM Relay] ---- 4. proxied connection ----> [Database]
[StrongDM Relay] ---- 5. proxied connection ----> [Linux Server]
[StrongDM Relay] ---- 6. proxied connection ----> [Kubernetes API]
[SIEM]
|
v
[Audit Export from Control Plane]

Core components

• Control Plane: Hosted management layer for identities, roles, resources, and audit logs.
• Relay: Customer-managed proxy deployed in VPCs, data centers, or hybrid networks.
• Gateway/Client: Endpoint software that initiates authenticated sessions.
• Resources: Databases, SSH, RDP, Kubernetes, and HTTP-based internal apps.
• Identity integrations: Okta, Microsoft Entra ID, Google Workspace, and SCIM providers.

Deployment models

• Single-region VPC relay for small production environments.
• Multi-region relays for latency reduction and resilience.
• Hybrid deployment with relays in on-prem and cloud networks.

Implementation Guide

1. Install the StrongDM CLI on an admin workstation.

brew install strongdm/tap/sdm
sdm version
sdm admin login

1. Create a relay token in the admin UI, then start a relay on Linux.

curl -J -O -L https://app.strongdm.com/releases/cli/linux
sudo install linux /usr/local/bin/sdm
sudo useradd --system --home /var/lib/sdm --shell /sbin/nologin sdm
sudo mkdir -p /etc/sdm /var/lib/sdm
sudo tee /etc/systemd/system/sdm-relay.service >/dev/null <<'EOF'
[Unit]
Description=StrongDM Relay
After=network.target

[Service]
User=sdm
Group=sdm
ExecStart=/usr/local/bin/sdm relay --token-file /etc/sdm/relay.token
Restart=always
RestartSec=5
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF
sudo chmod 600 /etc/sdm/relay.token
sudo systemctl daemon-reload
sudo systemctl enable --now sdm-relay
sudo systemctl status sdm-relay

1. Register a PostgreSQL resource.

sdm admin resources add postgres --name prod-pg --hostname prod-pg.internal.example.com --port 5432 --username sdm_broker --database appdb --relay default-relay

1. Create a role and grant access.

sdm admin roles create db-readonly
sdm admin roles grant resource db-readonly prod-pg
sdm admin roles grant account db-readonly alice@example.com

1. Verify user access.

sdm login
sdm status
sdm connect prod-pg
psql "host=127.0.0.1 port=15432 dbname=appdb user=readonly_user sslmode=disable"

Relay configuration baseline

relay:
  listen_address: "0.0.0.0:5000"
  diagnostics_address: "127.0.0.1:9999"
logging:
  level: info
network:
  outbound_only: true
  tls_min_version: "1.2"

Code Examples

Example 1: Export inventory as JSON

sdm admin resources list --json > resources.json
jq '.[] | {name: .name, type: .type, relay: .relay.name}' resources.json

Example 2: Terraform for a relay and role mapping

resource "sdm_relay" "primary" {
  name = "relay-prod-use1"
}

resource "sdm_role" "db_readonly" {
  name = "db-readonly"
}

Example 3: Audit event parsing

import json
with open("audit-events.json") as f:
    for line in f:
        evt = json.loads(line)
        if evt.get("action") == "resource.connect":
            print(evt["actor"]["email"], evt["resource"]["name"], evt["timestamp"])

Security Hardening

• Enforce SAML/OIDC SSO with MFA at the IdP and disable local admin accounts where possible.
• Deploy multiple relays per region and restrict relay egress with firewall rules to StrongDM endpoints and target resources only.
• Use ephemeral credentials or brokered identities instead of shared database passwords.
• Forward audit logs to Splunk, Microsoft Sentinel, or Elastic for retention and correlation.
• Apply least privilege through role-based grants tied to groups from Okta or Entra ID.
• Protect relay hosts with CIS baselines, EDR, disk encryption, and restricted shell access.

Comparison

Troubleshooting

Error 1: Relay cannot reach control plane

Log sample:

2026-02-14T09:21:43Z ERROR relay.connect failed to establish control channel error="dial tcp 34.120.18.10:443: i/o timeout"

Fix: Verify outbound TCP 443 from the relay, proxy settings, DNS resolution, and TLS inspection bypass for StrongDM domains.

Error 2: User authenticated but sees no resources

Log sample:

2026-02-14T09:24:11Z WARN authorization decision=deny user="alice@example.com" reason="no matching role grants for resource prod-pg"

Fix: Confirm SCIM group sync, role-to-account grants, and resource grants with sdm admin roles list and sdm admin roles grant resource.

Error 3: Database connection refused through relay

Log sample:

2026-02-14T09:27:02Z ERROR proxy.postgres connect failed resource="prod-pg" target="10.20.4.15:5432" error="connect: connection refused"

Fix: Validate target listener state, security group rules, DNS mapping, and whether PostgreSQL is bound to the expected interface.

Best Practices

Do

• Map access to business roles, for example platform-sre, finance-db-read, and contractor-k8s-readonly.
• Place relays close to workloads to reduce latency for SSH and database sessions.
• Send audit events to a SIEM and alert on after-hours admin access.
• Use Terraform for repeatable resource onboarding and role definitions.

Don't

• Do not expose databases directly to users just because StrongDM is in place; keep private addressing and relay-only paths.
• Do not assign broad wildcard access to engineering groups when narrower resource sets exist.
• Do not run a single relay for production-critical estates; use at least two per failure domain.