--- title: "Network & Firewall Setup" description: "This article will help you setup your network to ensure that the Symbo dialer will function properly" url: https://help.symbo.ai/en/articles/10157834-network-and-firewall-setup collection: "Dialer" updated: 2026-11-06 language: en --- # Network & Firewall Setup This article will help you setup your network to ensure that the Symbo dialer will function properly # Voice IP addresses to whitelist: The following IP addresses and domains are prioritized by importance. Begin by ensuring the required ones are whitelisted, as they are essential for functionality. Once those are addressed, proceed through the rest of the list in order, resolving any connectivity issues step by step. ## SIP Signaling (Required): ```javascript 52.9.254.123/32:5060 (TCP/UDP) ``` ## SIP Domains (Required): ```javascript (Plivo API) api.plivo.com https://api.plivo.com http://api.plivo.com ``` ## Symbo Dialer (Recommended): ```javascript https://*.symbo.com httpsL//*.symbo.lol ``` ## RTP Media Servers (Recommended): If you are still facing issues, you can try whitelisting the following IP addresses to ensure that you can make and receive calls from all locations. ​

Name

IP Addresses

Ports

SIP Signaling

JavaScript
52.9.254.123/32
52.9.254.127/32
216.120.187.64/32
216.120.187.65/32
216.120.187.66/32
216.120.187.67/32
216.120.187.68/32
204.89.148.64/32
204.89.148.65/32
204.89.148.66/32
204.89.148.67/32
204.89.148.68/32

JavaScript
5060, 5080 (UDP)
5060, 5061, 5063, 5080, 443 (TCP)

San Jose, California, USA

JavaScript
216.120.187.64/25
216.120.187.192/27

JavaScript
16384 - 32768 (UDP)
10000 - 30000 (UDP/TCP)

Ashburn, Virginia, USA

JavaScript
204.89.148.64/25
204.89.148.192/27

JavaScript
16384 - 32768 (UDP)
10000 - 30000 (UDP/TCP)

Frankfurt, Germany

JavaScript
3.120.121.128/26

JavaScript
16384 - 32768 (UDP)
10000 - 30000 (UDP/TCP)

São Paulo, Brazil

JavaScript
54.233.191.0/27
18.228.70.64/26

JavaScript
16384 - 32768 (UDP)
10000 - 30000 (UDP/TCP)

Sydney, Australia

JavaScript
13.238.202.192/26

JavaScript
16384 - 32768 (UDP)
10000 - 30000 (UDP/TCP)

Singapore

JavaScript
52.220.63.176/28
204.89.149.64/27
204.89.149.128/27

JavaScript
16384 - 32768 (UDP)
10000 - 30000 (UDP/TCP)

Mumbai, India

JavaScript
204.89.151.64/26
204.89.151.128/25

JavaScript
16384 - 32768 (UDP)
10000 - 30000 (UDP/TCP)

Reach out to us at team@symbo.ai or via chat if you have any questions or need assistance. We are here for you! ​