Ports for core services

AI-generated summary

Genesys Cloud requires specific ports to be open for its core DNS and NTP services to function properly. The DNS service uses UDP and TCP port 53 to provide name resolution for connections from Genesys Cloud clients, mobile apps, VoIP phones, edge devices, and bridge servers. The NTP service uses UDP port 123 to time.nist.gov and us.pool.ntp.org for time synchronization of edge devices and Polycom phones respectively. Opening these ports allows Genesys Cloud's core infrastructure to operate correctly.

This reference article lists the ports required for access to the DNS and NTP core services. For more information on other ports and services you may need to configure on your firewall, see About ports and services for your firewall.

Services	Transport/Port (Application)	Destination	Description
DNS	udp/53^* (DNS) tcp/53^* (DNS)	Corporate server^†	DNS provides name resolution for network connections. The DNS settings apply to: Genesys Cloud client (browser and desktop app) Genesys Cloud mobile app (iOS and Android) VoIP phones Edge devices Bridge servers
NTP	udp/123 (NTP)	time.nist.gov^†	Provides time synchronization for Edge devices.
us.pool.ntp.org^†	Provides time synchronization for Polycom phones.

Services

Transport/Port (Application)

Destination

Description

DNS

udp/53^* (DNS)

tcp/53^* (DNS)

Corporate server^†

DNS provides name resolution for network connections.

The DNS settings apply to:

Genesys Cloud client (browser and desktop app)
Genesys Cloud mobile app (iOS and Android)
VoIP phones
Edge devices
Bridge servers

NTP

udp/123 (NTP)

time.nist.gov^†

Provides time synchronization for Edge devices.

us.pool.ntp.org^†

Provides time synchronization for Polycom phones.

* Typical. If your network is configured for private or internal DNS, then port 53 is not required.

† Third-party service – not hosted by Genesys Cloud.

Revision historyClick to expand

Modified date (YYYY-MM-DD)	Revision
2020-12-14	Broke out the main sections of the larger Ports and services for your firewall article into smaller articles. Created this article to cover the ports for core services.

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Services	Transport/Port (Application)	Destination	Description
DNS	udp/53^* (DNS) tcp/53^* (DNS)	Corporate server^†	DNS provides name resolution for network connections. The DNS settings apply to: Genesys Cloud client (browser and desktop app) Genesys Cloud mobile app (iOS and Android) VoIP phones Edge devices Bridge servers
NTP	udp/123 (NTP)	time.nist.gov^†	Provides time synchronization for Edge devices.
us.pool.ntp.org^†	Provides time synchronization for Polycom phones.

Services

Transport/Port (Application)

Destination

Description

DNS

udp/53^* (DNS)

tcp/53^* (DNS)

Corporate server^†

DNS provides name resolution for network connections.

The DNS settings apply to:

Genesys Cloud client (browser and desktop app)
Genesys Cloud mobile app (iOS and Android)
VoIP phones
Edge devices
Bridge servers

NTP

udp/123 (NTP)

time.nist.gov^†

Provides time synchronization for Edge devices.

us.pool.ntp.org^†

Provides time synchronization for Polycom phones.

Ports for core services

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Ports for core services

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