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Requirements for configuring the SBC Edge in support of Teams Direct Routing include:

SBC Edge Requirements

RequirementHow it is Used

Public IP address of NAT device (must be Static)*

Private IP address of the SBC

Required for SBC Behind the NAT deployment.

Public IP address of SBCRequired for SBC with Public IP deployment.
Public FQDN The Public FQDN must point to the Public IP Address.

*NAT translates a public IP address to a Private IP address.

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Domain Name Examples

Domain Name*Use for SBC FQDN?FQDN Names - Examples
SonusMS01.com(tick)

Valid names:

hybridvoice.org

(tick)

Valid names:

Non-Valid name:

sbc1.europe.hybridvoice.org (requires registering domain name europe. hybridvoice.org in “Domains” first)

*Do not use the *.onmicrosoft.com tenant for the domain name.

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Expand
titleClick here to expand for Basic Firewall Settings
Inbound Public (Internet to SBC)
  • SIP TLS: TCP 5061*

  • Media for SBC 1000: UDP 16384-17584**
  • Media for SBC 2000: UDP 16384-19384*
  • Media for SBC SWe Edge: UDP 16384-21384
Outbound Public (SBC to Internet)
  • DNS: TCP 53

  • DNS: UDP 53

  • NTP: UDP 123

  • SIP TLS: TCP 5061

  • Media: UDP 49152-53247

Public Access Information

The tables below represent ACL (Access Control List) examples that protect the SBC Edge. When using Easy Configuration Teams related wizards in an Enterprise deployment, these attributes are automatically provisioned. If you are manually configuring the SBC Edge as part of a Microsoft Teams Direct Routing migration scenario (for example Skype for Business or CCE), you must manually configure these ports. For details on ACLs, refer to Creating and Modifying Rules for IPv6 Access Control Lists.

Public Access In - Requirements

Description

Protocol

Action

Src IP Address

Src Port

Dest IP Address

Dest Port

Outbound DNS Reply

TCP

Allow

0.0.0.0/0

53

SBC/32

0-65535

Outbound DNS Reply

UDP

Allow

0.0.0.0/0

53

SBC/32

0-65535

Outbound NTP Reply

UDP

Allow

0.0.0.0/0

123

SBC/32

123

Outbound SIP Reply

TCP

Allow

0.0.0.0/0

5061

SBC/32

1024-65535

Inbound SIP Request

TCP

Allow

0.0.0.0/0

1024-65535

SBC/32

5061*

Inbound Media Helper

UDP

Allow

52.112.0.0/14

52.120.0.0/14

49152-53247

SBC/32

16384-17584**

Deny All

Any

Deny

0.0.0.0/0


0.0.0.0/0



Public Access Out - Requirements

Description

Protocol

Action

Src IP Address

Src Port

Dest IP Address

Dest Port

Outbound DNS Request

TCP

Allow

SBC/32

0-65535

0.0.0.0/0

53

Outbound DNS Request

UDP

Allow

SBC/32

0-65535

0.0.0.0/0

53

Outbound NTP Request

UDP

Allow

SBC/32

0-65535

0.0.0.0/0

123

Outbound SIP Request

TCP

Allow

SBC/32

0-65535

0.0.0.0/0

5061

Inbound SIP Reply

TCP

Allow

SBC/32

5061*

0.0.0.0/0

1024-65535

Outbound Media Helper

UDP

Allow

SBC/32

16384-17584**

52.112.0.0/14

52.120.0.0/14

49152-53247

Deny All

Any

Deny

0.0.0.0/0


0.0.0.0/0


* Define in Tenant configuration

** SBC SWe Edge does not require this rule to be created since Media ports are opened as needed. This rule is required only for SBC 1000, SBC 2000 and then depends of the Media Port paired configured in the SBC.

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Expand
titleClick here to expand for Firewall Settings for an SBC with Media Bypass

Apply the following firewall rules below:

Info

The Teams Client IP address cannot be predicted. As a result, allow Any IP (0.0.0.0/0).

Inbound Public (Internet to SBC) 

Media for SBC 1000: UDP 17586-21186**

Media for SBC 2000: UDP 19386-28386**

Outbound Public (SBC to Internet)

Media: UDP 50000-50019

If the device that handles the NAT between the Teams Client and SBC Public IP is performing PAT (Port Address Translation), verify that this device has the source port range of the Teams Client media or open all the ports from 1024 to 65535.

For SBC behind NAT, the firewall should allow access between the firewall IP and the NAT device's IP.

For SBC not using NAT, there must be access between the firewall and the SBC's Public IP.

Public Access

The tables below represent ACL (Access Control List) examples that protect the SBC Edge; these ACL attributes are automatically provisioned if the Teams-related Easy Configuration wizards are used (applies to the greenfield deployment scenario only).

Public Access In - Requirements (Media Bypass Scenario)

Description

Protocol

Action

Src IP Address

Src Port

Dest IP Address

Dest Port

Inbound Media Bypass Helper

UDP

Allow

0.0.0.0/0

1024-65535

SBC/32

16384-21186**


Public Access Out - Requirements (Media Bypass Scenario)

Description

Protocol

Action

Src IP Address

Src Port

Dest IP Address

Dest Port

Outbound Media Bypass Helper

UDP

Allow

SBC/32

16384-21186**

0.0.0.0/0

1024-65535

* Define in Tenant configuration

** SBC SWe Edge does not require this rule to be created since Media ports are opened as needed. This rule is required only for SBC 1000, SBC 2000 and then depends of the Media Port paired configured in the SBC.

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