Server Ports
This document provides System Administrators with a list of ports for the machines in their CircleCI 2.0 installation:
| Machine type | Port number | Protocol | Direction | Source / destination | Use | Notes |
|---|---|---|---|---|---|---|
| Services Machine | 80 | TCP | Inbound | End users | HTTP web app traffic | |
| 443 | TCP | Inbound | End users | HTTPS web app traffic | ||
| 7171 | TCP | Inbound | End users | Artifacts access | ||
| 8081 | TCP | Inbound | End users | Artifacts access | ||
| 22 | TCP | Inbound | Administrators | SSH | ||
| 8800 | TCP | Inbound | Administrators | Admin console | ||
| 8125 | UDP | Inbound | Nomad Clients | Metrics | ||
| 8125 | UDP | Inbound | Nomad Servers | Metrics | Only if using externalised Nomad Servers | |
| 8125 | UDP | Inbound | All Database Servers | Metrics | Only if using externalised databases | |
| 4647 | TCP | Bi-directional | Nomad Clients | Internal communication | ||
| 8585 | TCP | Bi-directional | Nomad Clients | Internal communication | ||
| 7171 | TCP | Bi-directional | Nomad Clients | Internal communication | ||
| 3001 | TCP | Bi-directional | Nomad Clients | Internal communication | ||
| 80 | TCP | Bi-directional | GitHub Enterprise / GitHub.com (whichever applies) | Webhooks / API access | ||
| 443 | TCP | Bi-directional | GitHub Enterprise / GitHub.com (whichever applies) | Webhooks / API access | ||
| 80 | TCP | Outbound | AWS API endpoints | API access | Only if running on AWS | |
| 443 | TCP | Outbound | AWS API endpoints | API access | Only if running on AWS | |
| 5432 | TCP | Outbound | PostgreSQL Servers | PostgreSQL database connection | Only if using externalised databases. Port is user-defined, assuming the default PostgreSQL port. | |
| 27017 | TCP | Outbound | MongoDB Servers | MongoDB database connection | Only if using externalised databases. Port is user-defined, assuming the default MongoDB port. | |
| 5672 | TCP | Outbound | RabbitMQ Servers | RabbitMQ connection | Only if using externalised RabbitMQ | |
| 6379 | TCP | Outbound | Redis Servers | Redis connection | Only if using externalised Redis | |
| 4647 | TCP | Outbound | Nomad Servers | Nomad Server connection | Only if using externalised Nomad Servers | |
| 443 | TCP | Outbound | CloudWatch Endpoints | Metrics | Only if using AWS CloudWatch | |
| Nomad Clients | 64535-65535 | TCP | Inbound | End users | SSH into builds feature | |
| 80 | TCP | Inbound | Administrators | CircleCI Admin API access | ||
| 443 | TCP | Inbound | Administrators | CircleCI Admin API access | ||
| 22 | TCP | Inbound | Administrators | SSH | ||
| 22 | TCP | Outbound | GitHub Enterprise / GitHub.com (whichever applies) | Download Code From GitHub. | ||
| 4647 | TCP | Bi-directional | Services Machine | Internal communication | ||
| 8585 | TCP | Bi-directional | Services Machine | Internal communication | ||
| 7171 | TCP | Bi-directional | Services Machine | Internal communication | ||
| 3001 | TCP | Bi-directional | Services Machine | Internal communication | ||
| 443 | TCP | Outbound | Cloud Storage Provider | Artifacts storage | Only if using external artifacts storage | |
| 53 | UDP | Outbound | Internal DNS Server | DNS resolution | This is to make sure that your jobs can resolve all DNS names that are needed for their correct operation | |
| 8125 | UDP | Outbound | Nomad Clients | Metrics | ||
| GitHub Enterprise / GitHub.com (whichever applies) | 22 | TCP | Inbound | Services Machine | Git access | |
| 22 | TCP | Inbound | Nomad Clients | Git access | ||
| 80 | TCP | Inbound | Nomad Clients | API access | ||
| 443 | TCP | Inbound | Nomad Clients | API access | ||
| 80 | TCP | Bi-directional | Services Machine | Webhooks / API access | ||
| 443 | TCP | Bi-directional | Services Machine | Webhooks / API access | ||
| PostgreSQL Servers | 5432 | TCP | Inbound | Services Machine | PostgreSQL database connection | Only if using externalised databases. Port is user-defined, assuming the default PostgreSQL port. |
| 5432 | TCP | Bi-directional | PostgreSQL Servers | PostgreSQL replication | Only if using externalised databases. Port is user-defined, assuming the default PostgreSQL port. | |
| MongoDB Servers | 27017 | TCP | Inbound | Services Machine | MongoDB database connection | Only if using externalised databases. Port is user-defined, assuming the default MongoDB port. |
| 27017 | TCP | Bi-directional | MongoDB Servers | MongoDB replication | Only if using externalised databases. Port is user-defined, assuming the default MongoDB port. | |
| RabbitMQ Servers | 5672 | TCP | Inbound | Services Machine | RabbitMQ connection | Only if using externalised RabbitMQ |
| 5672 | TCP | Bi-directional | RabbitMQ Servers | RabbitMQ mirroring | Only if using externalised RabbitMQ | |
| Redis Servers | 6379 | TCP | Inbound | Services Machine | Redis connection | Only if using externalised Redis |
| 6379 | TCP | Bi-directional | Redis Servers | Redis replication | Only if using externalised Redis and using Redis replication (optional) | |
| Nomad Servers | 4646 | TCP | Inbound | Services Machine | Nomad Server connection | Only if using externalised Nomad Servers |
| 4647 | TCP | Inbound | Services Machine | Nomad Server connection | Only if using externalised Nomad Servers | |
| 4648 | TCP | Bi-directional | Nomad Servers | Nomad Servers internal communication | Only if using externalised Nomad Servers |