KUDO uses secure web technologies and real-time communication services to deliver multilingual meetings, AI translation, captions, audio and video. If users connect from a corporate, government, educational or other restricted network, firewall or proxy settings may block parts of the KUDO platform. This guide lists the domains, ports and IP ranges to allow.

Signs of a firewall or network restriction

Users affected by firewall or proxy restrictions may see:

• Meetings that won’t join
• Loading screens that never finish
• Missing audio or video
• Interpretation channels that don’t load
• The KUDO panel not appearing in Microsoft Teams
• Frequent disconnects or reconnects
• Captions or AI translation failing to start
• Webcam or microphone connection failures
• The KUDO Widget or Mobile Link not loading properly

Domains

Depending on your firewall or endpoint security settings, you may need to allow these domains:

• *.kudoway.com for accounts in the USA or Asia-Pacific region
• *.kudoway.eu for accounts in the Europe region
• *.kudoway.ca for accounts in the Canada region
• *.tokbox.com
• *.opentok.com

Ports

All media traffic (audio and video) goes through STUN servers. All traffic is bidirectional.

Proxies

If your network can reach the internet only through a proxy, the proxy must either be transparent or be configured in the browser for HTTPS connections. KUDO doesn’t support proxies that require authentication.

Firewall behavior

Some firewalls and endpoint security tools use stateful packet inspection or flood control. These features can deprioritize or throttle media streams, which lowers quality or, in some cases, blocks the stream. Users may notice audio or video problems after a short period of use. If this happens, contact your organization’s IT security team.

Attendee networks at onsite events

On the network attendees use to follow KUDO at an onsite event:

• Don’t use a captive portal.
• Don’t set per-device bandwidth limits.
• Don’t filter UDP traffic.

For Wi-Fi capacity and sizing, see Set up KUDO translation for an onsite event.

Microsoft Teams

If you use KUDO with Microsoft Teams, all the requirements above apply. Also allow these subdomains and ports:

• https://teams-bot.kudoway.com
• https://teams-web.kudoway.com
• TCP port 8445
• TCP port 9444

IP ranges

KUDO uses dynamic IP addresses and elastic load balancing, so we can’t guarantee the exact IP addresses your meetings will use. We can provide ranges instead. We change these ranges periodically for technical and security reasons.

If your organization allows these ranges, ask KUDO Support to add you to the mailing list for range updates. We notify customers three weeks before a change.

IP version support

KUDO supports IPv4.

Ranges to allow

Depending on your firewall settings and policies, you may need to allow two sets of addresses: the server for your account’s region, and KUDO Media Services.

These ranges were updated on March 2022.

KUDO Media Services (required for all accounts):

3.123.12.128/28
3.127.48.224/28
3.214.145.96/27
3.234.232.160/27
3.234.248.80/28
3.235.255.176/28
3.248.234.48/28
3.248.243.144/28
3.248.244.96/27
3.25.48.192/28
3.38.113.0/24
3.38.114.0/24
3.38.91.128/25
3.7.161.0/26
3.7.161.48/28
13.251.158.0/28
15.228.1.16/28
18.139.118.176/28
18.141.165.128/27
18.156.18.0/27
18.157.71.112/28
18.179.48.208/28
18.180.159.224/27
18.202.216.0/28
34.218.216.144/28
34.222.66.96/28
34.223.51.192/27
34.223.51.224/27
35.158.127.224/28
44.232.236.96/27
44.234.90.64/28
52.200.60.16/28
52.213.63.176/28
52.41.63.240/28
52.51.63.16/28
52.65.127.192/27
52.66.255.192/27
54.233.127.224/29
54.250.250.208/28
54.69.125.241/32
54.89.253.64/28
99.79.160.16/28
99.80.88.240/28
168.100.64.0/18

Related content

• Set up KUDO translation for an onsite event
• Plan Wi-Fi requirements for a large event
• Contact KUDO Support