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Consul ports and what they are used for

• Feb. 10, 2017, 10:35 a.m.
• System Operations
• General
• Jeroen Jacobs

Here is an overview of the firewall rules needed by Consul to operate correctly.

Ports required by Consul servers and agents:

• 8301 (tcp and udp): Gossip protocol between agents and servers.
• 8400 (tcp): Used for RPC communication from the commandline tools.
• 8500 (tcp): HTTP API.
• 8600 (tcp and udp): DNS interface.

Ports used by Consul servers only:

• 8300 (tcp): Used to handle incoming connections by Consul agents
• 8302 (tcp and udp): Gossip protocol between Consul servers