Network Access Requirements

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To establish cloud connections, computers and devices running VNC Connect must be able to communicate with RealVNC’s cloud service at the locations in the table below. If a proxy or firewall is blocking outgoing communications, cloud connections cannot be established.

You don’t need to comply with these requirements if you have an Enterprise subscription and only establish direct connections.

We highly recommend allowing access using IP ranges and not URL to ensure connectivity continues working when additional capacity is added. 

Note on SSL/TLS Proxies

Strict certificate signature checking is used in VNC Connect clients (VNC Viewer and VNC Server) - SSL/TLS proxies that intercept SSL/TLS connections and mint new certificates will cause connections to fail. If SSL/TLS proxies or endpoint security software with SSL/TLS inspection are used in your organization, please ensure the URLs detailed below are whitelisted/bypassed.

If you are sure endpoints have network access but you still cannot establish cloud connections, check our service status page.

URL IPv4 address TCP port UDP port
https://auth-a.services.vnc.com  212.119.29.178  443  n/a
https://auth-b.services.vnc.com  165.254.191.246
https://auth-c.services.vnc.com  165.254.191.230
https://dir-a.services.vnc.com  212.119.29.179  443  n/a
https://dir-b.services.vnc.com
 165.254.191.247
https://dir-c.services.vnc.com  165.254.191.231
https://hb-a.services.vnc.com  212.119.29.177  443  n/a
https://hb-b.services.vnc.com  165.254.191.245
https://hb-c.services.vnc.com  165.254.191.229
https://hc-1-gb-slg-1.services.vnc.com  212.119.29.128/28  443

3478

11000-20000*


 *required for High Speed Streaming and Audio

https://hc-2-gb-slg-1.services.vnc.com
https://hc-3-gb-slg-1.services.vnc.com
https://hc-4-gb-slg-1.services.vnc.com
https://hc-5-gb-slg-1.services.vnc.com
https://hc-6-gb-slg-1.services.vnc.com
https://hc-7-gb-slg-1.services.vnc.com
https://hc-8-gb-slg-1.services.vnc.com
https://hc-9-gb-slg-1.services.vnc.com
https://hc-10-gb-slg-1.services.vnc.com
https://hc-11-gb-slg-1.services.vnc.com
https://hc-12-gb-slg-1.services.vnc.com
https://hc-13-gb-slg-1.services.vnc.com
https://hc-1-us-ca-1.services.vnc.com  165.254.239.128/28
https://hc-2-us-ca-1.services.vnc.com
https://hc-3-us-ca-1.services.vnc.com
https://hc-4-us-ca-1.services.vnc.com
https://hc-7-us-ca-1.services.vnc.com
https://hc-8-us-ca-1.services.vnc.com
https://hc-1-us-va-1.services.vnc.com  165.254.191.192/28
https://hc-2-us-va-1.services.vnc.com
https://hc-3-us-va-1.services.vnc.com
https://hc-4-us-va-1.services.vnc.com
https://hc-7-us-va-1.services.vnc.com
https://hc-8-us-va-1.services.vnc.com
https://hc-9-us-va-1.services.vnc.com
https://hc-10-us-va-1.services.vnc.com
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