1.2.2 Firewall Requirements
1.2 Important Notice for Subscription and Installation
1.2.1 Port Requirements
Required Ports for Each Channel
When configuring a router with NAT enabled, you need to secure a certain number of ports for each SIP and RTP/RTCP channel. For RTP/RTCP, the number of required ports is double the number of activated SIP trunks (Ch). For SIP signalling, the number of required ports is always one regardless of the number of activated SIP trunks (Ch).
<Example>
If 4 SIP trunk channels are activated, you need the following number of ports:
Protocol Type
RTP
RTCP
SIP
Total
Required Port
4
4
1
9
1.2.2 Firewall Requirements
If the VoIP network contains a firewall, you must configure the firewall to allow VoIP packets to pass through certain ports of the ports listed below without being blocked by filtering. The ports for which you need to configure the firewall may vary depending on the network conditions.
For more information, consult your network administrator.
[IP Packets to
Port | TCP/UDP |
| Default Port No. | ||
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SIP Client Port | UDP |
| 35060 |
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STUN Client Port | UDP |
| 33478 |
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NAT Voice (RTP) UDP Port | UDP |
| 16000 to N | ||
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DNS (Client) Port | UDP |
| 30053 |
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[IP Packets from |
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Port | TCP/UDP |
| Default Port No. | ||
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SIP Server Port | UDP |
| 5060 |
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Registrar Server Port | UDP |
| 5060 |
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STUN Server Port | UDP |
| 3478 |
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Manual DNS Server Port | UDP |
| 53 |
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Programming Manual for Virtual SIP Trunk Card
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