Halcyon Network Requirements

Applies To

Halcyon Console and Halcyon Agent to cloud communications

Overview

To ensure access and connectivity from your internal network to Halcyon services, ensure the following cloud resources are allowed through your network.

Requirements

• Console and Agent communications occur over TCP port 443.
• Halcyon Windows Agent service and UI communicate over port 50051.
• Support for gRPC over HTTP/2.

gRPC and HTTP/2 Requirement:

The Halcyon agent communicates using gRPC over HTTP/2 and requires that HTTP/2 over TLS be preserved end‑to‑end. Network devices such as proxies, firewalls, or security gateways may perform packet inspection as long as they do not terminate TLS, modify the encrypted payload, or downgrade HTTP/2 to HTTP/1.1. Any device that cannot maintain end‑to‑end HTTP/2 over TLS must be configured to bypass or exempt Halcyon traffic.

US Region

Resource:	URL:
Halcyon Console	https://console.halcyon.ai
Halcyon Agent	global.halcyon.ai c2.halcyon.ai atlas.halcyon.ai download.halcyon.ai prod-execution-output-20220501160059879100000001.s3.amazonaws.com

EU Region

Resource:	URL:
Halcyon Console	https://console.eu.halcyon.ai
Halcyon Agent	global.halcyon.ai c2.eu.halcyon.ai atlas.eu.halcyon.ai download.eu.halcyon.ai eu-execution-output-20231019174259572800000007.s3.amazonaws.com

AE Region

Resource:	URL:
Halcyon Console	https://console.ae.halcyon.ai
Halcyon Agent	global.halcyon.ai c2.ae.halcyon.ai atlas.ae.halcyon.ai download.ae.halcyon.ai ae-execution-output-20240910144535116400000010.s3.amazonaws.com

 

AP Region

Resource:	URL:
Halcyon Console	https://console.ap.halcyon.ai
Halcyon Agent	global.halcyon.ai c2.ap.halcyon.ai atlas.ap.halcyon.ai download.ap.halcyon.ai ap-execution-output-20250813041110243400000004.s3.ap-northeast-1.amazonaws.com

 

Additional Information

For Agent to cloud communication - While host base exclusions are recommended, if IP based exclusions must be used, the following IP addresses are to be used:

US Region

Host:	IP Addresses:
c2.halcyon.ai atlas.halcyon.ai	166.117.63.106 166.117.207.155

EU Region

Host:	IP Addresses:
c2.eu.halcyon.ai atlas.eu.halcyon.ai	166.117.23.118 166.117.240.132

AE Region

Host:	IP Addresses:
c2.ae.halcyon.ai atlas.ae.halcyon.ai	166.117.62.70 166.117.142.141

 

AP Region

Host:	IP Addresses:
c2.ap.halcyon.ai atlas.ap.halcyon.ai	166.117.118.99 76.223.89.164

 

For all regions, Global, Download and S3 URLs do not have static IP addresses at this time.