What DynamoDB Port Actually Does and When to Use It

You have an application talking to AWS DynamoDB and a security team breathing down your neck about open ports. You probably typed “DynamoDB port” into Google while wondering, “Wait, which one is it again?” Let’s clear that up and make sure your traffic, your credentials, and your sanity remain intact.

The DynamoDB port question sounds tiny but touches everything from secure networking to automation. DynamoDB is a fully managed NoSQL database from AWS, accessed via API over HTTPS. In plain English: you do not connect to it on some weird custom port like a traditional database. It uses standard TCP port 443, the same one your browser uses for HTTPS. That means less firewall pain, fewer manual rules, and better compatibility with identity-aware access systems.

Still, there’s more to it. Because DynamoDB traffic travels over HTTPS, every request passes through AWS IAM for authentication and authorization. Rather than worrying about the port itself, what you actually control is who can call it, how, and from where. Secure configurations depend on your VPC, your IAM roles, and whether the clients use private endpoints or public ones.

A solid integration flow looks like this:

1. Your app or service gets short-lived credentials through an identity provider like Okta via OIDC.
2. The code signs DynamoDB API requests using those temporary credentials.
3. Your network policies restrict outbound traffic to AWS endpoints, usually over port 443.
4. Observability tools or proxies log the calls for audit or debugging.

That pattern keeps the keys out of code and gives your team confidence that only the right identities can hit that port.

Quick answer for the impatient: DynamoDB listens on port 443 for all HTTPS requests. You connect using the AWS SDK or API, not a database socket.

Best practices for DynamoDB Port configuration

• Always use AWS PrivateLink if your workloads sit inside a VPC. It reduces exposure by keeping traffic off the public internet.
• Enforce IAM conditions with source VPC or subnet checks. Identity beats static firewalls every time.
• Rotate access keys or, better yet, stop using long-lived ones.
• Monitor with CloudTrail so you can map every write or query back to an exact principal.

Benefits of handling the port this way

• No additional firewall headaches; everything stays on 443.
• Standard TLS encryption with built-in AWS certificate management.
• Cleaner IAM-based access control instead of managing network ACLs.
• Easier compliance alignment with SOC 2 and similar frameworks.
• Obvious audit trails for every call.

For developers, it’s refreshingly boring. You do not need to change client ports, poke holes in firewalls, or tinker with connection strings. You just call the SDK, set your region, and move on. That simplicity means less downtime and much faster onboarding.

Platforms like hoop.dev take this even further. They bind your identity provider, IAM roles, and service policies together so you can manage who talks to DynamoDB without exposing credentials or juggling tokens. The result is an identity-aware proxy that enforces your policies in real time, giving both security and dev teams exactly what they want: trust and speed.

How do I connect DynamoDB to a private network?
Use AWS PrivateLink or a VPC endpoint. It routes traffic internally while still using port 443, so your database never leaves the AWS backbone.

Does DynamoDB ever require a custom port?
No. DynamoDB connections always use HTTPS over port 443. Any other port setting means you’re proxying, tunneling, or doing something exotic that AWS does not require.

In short, knowing which port DynamoDB uses is easy. Controlling who can reach it is the real work, and that’s where good identity, policy, and automation pay off.

See an Environment Agnostic Identity-Aware Proxy in action with hoop.dev. Deploy it, connect your identity provider, and watch it protect your endpoints everywhere—live in minutes.