VoIP IP Addresses for configuring firewalls

This article will provide you with information to assist advanced users in configuring a firewall for use with a VoIP service.

The intent of this list is to provide the raw information needed for configuring advanced firewalls, usually in a business or complex network setup. This information is usually not required for users of our residential products, but we've published it here for all iiNet customers.
 

IP Address Ranges

For continued operation of your voice services, all of the IP addresses below must be added to your firewall configuration.

iiNet utilizes automatic failover to the next available cluster during times maintenance and faults, therefore your equipment will need to be able to connect all the clusters at any time to maintain reliability.

Service/Locations IP Subnets (CIDR) IP Network Range
National Services
(Session Balancing)
203.173.44.0/24
  • 203.173.44.0 - 203.173.44.255
Brisbane Network
(Signalling & Media)
203.55.228.192/26
  • 203.55.228.192 - 203.55.228.255
Sydney SBC Cluster
(Signalling & Media)
203.55.231.192/26
  • 203.55.231.192 - 203.55.231.255
Melbourne SBC Cluster
(Signalling & Media)
203.55.229.192/26
  • 203.55.229.192 - 203.55.229.255
Adelaide SBC Cluster
(Signalling & Media)
203.2.134.0/25
  • 203.2.134.0 - 203.2.134.127
Perth SBC Cluster
(Signalling & Media)
203.59.49.0/26
  • 203.59.49.0 - 203.59.49.63
Configuration and Firmware (Business Voice services)
  • 203.55.231.64/27
  • 203.206.62.0/27
 

DNS Servers

(for iiNet Internet Customers)

  • 203.0.178.191
  • 203.215.29.191
  • 203.0.178.191
  • 203.215.29.191

NTP Server (Time Sync)

(for iiNet Internet Customers)

  • 203.0.178.191
  •  203.0.178.191

Note: The Config/Firmware download servers may automatically redirect customer equipment to the vendor website for firmware download. 
 

Protocols and Ports

Protocol Name

UDP/TCP Ports used by Protocol
SIP (VoIP Signalling) Both UDP & TCP

5060, 5061 & 5070

RTP (VoIP Audio/Video) UDP Only 15000-49999
DNS Both UDP & TCP 53
NTP (Time Sync) UDP Only 123
Configuration and Firmware (Business Voice services)  TCP Only 80 & 
443

Note: This information is subject to change without notice, however we will endeavor to keep this page up-to-date.
 

Example configuration

This example can be integrated into your existing firewall configuration if suitable. Ensure you test these comprehensively prior to implementation, and consult with your IT Security staff/consultants to assist with integration if you are unsure of how to use these, or the wider implications of their use.

Please note: iiNet does not recommend, endorse, or support the configuration example.
 

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