Firewalls and NATs

If you connect to the Sonetel service with a SIP device of some type then you may experience problems caused by your Internet router, NAT or Firewall.

Every computer network – in homes and at offices – is usually protected by a firewall that prevents hackers at the Internet from getting control over your computers and information.

Even the cheapest routers that you buy for use at home include a firewall.

These routers also include a so called NAT, which allows you to have multiple computers on your computer network, although your Internet provider only has provided you with one address (IP number). The NAT magically allows multiple computers within a local network to appear as one to the outside.

In case you have audio problems with calls please contact Sonetel support.

IP addresses used

We will send calls (SIP invites) from the following IP addresses;

54.89.26.205

52.200.74.203

52.5.191.169

52.50.225.135

52.50.177.205

52.49.237.29

52.18.249.236

IP Ports used

3478 (STUN)

5060 (SIP)

Media Relay

If you have problems with the audio in your calls and are using our Media Relay service we will send the audio to you from the following IPs. The audio will be sent from ports between 50000 to 60000.

52.49.6.140

52.49.9.69

52.50.180.156

34.252.144.112