Firewall Configuration

To function properly, Seshboard must communicate with:

  1. Seshboard's backend servers

  2. Cloud servers operated by Twilio (for video communication)

  3. Google Cloud servers (for data storage)

  4. Domains for tools that can be optionally embedded in Seshboard rooms

Below are the domains and ports that must be allowed by your firewall.



1) Seshboard's backend servers


app.seshboard.com                        443 TCP
seshboard-prod-1.wl.r.appspot.com        443 TCP


2) Twilio Video


Seshboard uses Twilio Video (a WebRTC video platform) for video communication. Twilio Video needs access to signaling servers on these domains and ports:


global.vss.twilio.com       443 WSS
sdkgw.us1.twilio.com        443 WSS
au1.vss.twilio.com          443 WSS
br1.vss.twilio.com          443 WSS
de1.vss.twilio.com          443 WSS
ie1.vss.twilio.com          443 WSS
in1.vss.twilio.com          443 WSS
jp1.vss.twilio.com          443 WSS
sg1.vss.twilio.com          443 WSS
us1.vss.twilio.com          443 WSS
us2.vss.twilio.com          443 WSS

To handle video streams, Twilio Video also needs UDP traffic to be allowed on ports 10,000 - 60,000 for the following IP address ranges:


Twilio Video media servers (Australia):

13.210.2.128/27 (13.210.2.128 - 13.210.2.159)
54.252.254.64/26 (54.252.254.64 - 54.252.254.127)
3.25.42.128/25 (3.25.42.128 - 3.25.42.255)

Twilio Video media servers (Brazil):

18.231.105.32/27 (18.231.105.32 - 18.231.105.63)
177.71.206.192/26 (177.71.206.192 - 177.71.206.255)
18.230.125.0/25 (18.230.125.0 - 18.230.125.127)

Twilio Video media servers (Germany):

52.59.186.0/27 (52.59.186.0 - 52.59.186.31)
18.195.48.224/27 (18.195.48.224 - 18.195.48.255)
18.156.18.128/25 (18.156.18.128 - 18.156.18.255)

Twilio Video media servers (Ireland):

52.215.253.0/26 (52.215.253.0 - 52.215.253.63)
54.171.127.192/26 (54.171.127.192 - 54.171.127.255)
52.215.127.0/24 (52.215.127.0 - 52.215.127.255)
3.249.63.128/25 (3.249.63.128 - 3.249.63.255)

Twilio Video media servers (India):

52.66.193.96/27 (52.66.193.96 - 52.66.193.127)
52.66.194.0/26 (52.66.194.0 - 52.66.194.63)
3.7.35.128/25 (3.7.35.128 - 3.7.35.255)

Twilio Video media servers (Japan region):

13.115.244.0/27 (13.115.244.0 - 13.115.244.31)
54.65.63.192/26 (54.65.63.192 - 54.65.63.255)
18.180.220.128/25 (18.180.220.128 - 18.180.220.255)

Twilio Video media servers (Singapore region):

13.229.255.0/27 (13.229.255.0 - 13.229.255.31)
54.169.127.128/26 (54.169.127.128 - 54.169.127.191)
18.141.157.128/25 (18.141.157.128 - 18.141.157.255)

Twilio Video media servers (US East Coast):

34.203.254.0/24 (34.203.254.0 - 34.203.254.255)
54.172.60.0/23 (54.172.60.0 - 54.172.61.255)
34.203.250.0/23 (34.203.250.0 - 34.203.251.255)
3.235.111.128/25 (3.235.111.128 - 3.235.111.255)

Twilio Video media servers (US West Coast):

34.216.110.128/27 (34.216.110.128 - 34.216.110.159)
54.244.51.0/24 (54.244.51.0 - 54.244.51.255)
44.234.69.0/25 (44.234.69.0 - 44.234.69.127)


3) Google Cloud


Because Google Cloud services are very widely used, it is likely that your firewall already allows connections to these services.


firestore.googleapis.com          443 TCP
securetoken.googleapis.com        443 TCP
firebasestorage.googleapis.com    443 TCP


4) Embedded tools


miro.com            443 TCP
mirostatic.com      443 TCP
www.youtube.com     443 TCP
docs.google.com     443 TCP


Testing your firewall configuration


To test whether your firewall is configured correctly, please try the following:


  • Visit https://networktest.twilio.com to test whether your network is configured correctly for Twilio Video

  • Sign up for a free account at seshboard.com and enter a Seshboard room


You can also schedule a test session with our team for a quick end-to-end test of Seshboard. Feel free to book a time at https://calendly.com/seshboard/support, and we will send you an invitation to a Seshboard room. A member of our team will meet you in the room and test the room's functionality with you, which requires approximately 10 minutes.



Contact us


If you have any questions or need any assistance with your firewall configuration, please contact our team by email at hello@seshboard.com or by using the ‘Contact Us’ chat box on seshboard.com.