Net2phone firewall configuration

If you are experiencing poor call quality or dropped calls with your Net2phone hosted phone system, several factors could be contributing to the problem. The most common issues are often related to your Internet Service Provider (ISP), including latency and packet loss. Another frequent problem might be related to your firewall configuration. Your firewall plays a critical role in handling your voice traffic, and if it's not configured correctly, you may encounter these issues.

To ensure the best possible experience with your Net2phone services, please make sure to adjust your security policy and configuration accordingly.

You may also access specific guides for the specific firewall you use below. If you use another firewall, please implement the rules outlined in this article.

Cisco Meraki configuration

SonicWALL configuration

IMPORTANT
Please consult the security device manufacturer or vendor and their documentation for best practices on how to implement the changes.
You can always reach our Support Team by emailing support@empiretelecomnj.com

NOTE
SIP ALG should be disabled. UDP timeout should be set to at least 300 seconds.

Be sure to allow traffic in both directions

SIP

TCP/UDP 5060 & 6070

WebRTC

TCP 443

RTP

UDP Ports 10000-30000

TLS

TCP 5061 & 6071

207.202.0.0 /18

206.20.219.0 /24

169.132.219.0 /24

206.20.196.18/32

52.205.116.249 /32

54.210.131.150 /32

3.95.70.177 /32

52.201.151.226 /32

54.209.224.43 /32

13.56.104.79 /32

For more information please visit support.yealink.com

YMCS/RPS

20.85.145.227 /32

20.88.189.229 /32

20.19.104.34 /32

20.85.145.227 /32

20.242.144.0 /32

20.242.144.1 /32

52.71.103.102 /32

20.19.8.96 /28

20.19.8.224 /28

20.74.93.64 /28

20.19.8.48 /28

20.74.88.160 /31

20.74.88.194 /31

20.199.107.91 /32

20.19.104.34 /32

For more information please visit documentation.grandstream.com

GAPS/GCMS

52.221.130.73 /32

35.161.51.90 /32

3.71.171.8 /32

54.185.115.131 /32

144.202.94.88 /32

217.69.12.50 /32

137.220.35.215 /32

Services

For more information please visit docs.poly.com

ZTP/PDMS

18.235.37.112 /32

3.219.214.168 /32

13.52.69.0 /32

13.56.185.145 /32

13.57.121.193 /32

54.241.91.173 /32

54.241.160.4 /32

54.241.163.234 /32

54.67.107.54 /32

54.67.113.163 /32

54.219.101.213 /32

52.52.249.241 /32

52.53.96.55 /32

52.9.223.41 /32

52.9.225.203 /32