60 lines
3.0 KiB
Plaintext
60 lines
3.0 KiB
Plaintext
---
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layout: docs
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page_title: Required Ports
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sidebar_title: Required Ports
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description: >-
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Before starting Consul it is important to have the necessary bind ports
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accessible.
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---
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# Required Ports
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Consul requires up to 6 different ports to work properly, some on
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TCP, UDP, or both protocols. Below we document the requirements for each
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port.
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## Ports Table
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Before running Consul, you should ensure the following bind ports are accessible.
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| Use | Default Ports |
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| ------------------------------------------------------------------------------------------------------------- | ----------------- |
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| DNS: The DNS server (TCP and UDP) | 8600 |
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| HTTP: The HTTP API (TCP Only) | 8500 |
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| HTTPS: The HTTPs API | disabled (8501)\* |
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| gRPC: The gRPC API | disabled (8502)\* |
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| LAN Serf: The Serf LAN port (TCP and UDP) | 8301 |
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| Wan Serf: The Serf WAN port (TCP and UDP) | 8302 |
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| server: Server RPC address (TCP Only) | 8300 |
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| Sidecar Proxy Min: Inclusive min port number to use for automatically assigned sidecar service registrations. | 21000 |
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| Sidecar Proxy Max: Inclusive max port number to use for automatically assigned sidecar service registrations. | 21255 |
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\*For `HTTPS` and `gRPC` the ports specified in the table
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are recommendations.
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## Port Information
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**DNS Interface** Used to resolve DNS queries.
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**HTTP API** This is used by clients to talk to the HTTP
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API.
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**HTTPS API** (Optional) Is off by default, but port 8501 is a convention
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used by various tools as the default.
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**gRPC API** (Optional). Currently gRPC is
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only used to expose the xDS API to Envoy proxies. It is off by default, but port 8502 is a convention used by various tools as the default. Defaults to 8502 in `-dev` mode.
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**Serf LAN** This is used to handle gossip in the LAN.
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Required by all agents.
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**Serf WAN** This is used by servers to gossip over the WAN, to
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other servers. As of Consul 0.8 the WAN join flooding feature requires
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the Serf WAN port (TCP/UDP) to be listening on both WAN and LAN interfaces. See also:
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[Consul 0.8.0 CHANGELOG](https://github.com/hashicorp/consul/blob/master/CHANGELOG.md#080-april-5-2017) and [GH-3058](https://github.com/hashicorp/consul/issues/3058)
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**Server RPC** This is used by servers to handle incoming
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requests from other agents.
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Note, the default ports can be changed in the [agent configuration](/docs/agent/options#ports).
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