Ably FAQs

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Ably FAQs

Ably architecture, transports, and security

Ably architecture, transports, and security

Details on how Ably works and what makes us reliable and secure

Is Ably currently exploring Web Transport?

Transports and connections

Which TLS Version does the ably-js library use?

Which transports are supported?

Do you support multiplexing and channel groups?

Connection state recovery

Why is the Realtime SDK always establishing Comet connections for long polling rather than using it as a fallback for WebSockets?

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Security

If I need to whitelist Ably's servers from a firewall, which ports, IPs and/or domains should I add?

"The security certificate has been revoked" error connecting to Ably

When I change a key's capabilities in the dashboard, will existing connections get those capabilities immediately?

How can you restrict which channels a client can access?

Do you support certificate and/or public key pinning for TLS connections?

Recommendations for incrementally authorising new capabilities

Can a client emulate any client ID i.e. authenticate using a wildcard client ID?

Token and Basic authentication

Authenticated and identified clients

Are messages sent to and received from Ably securely using TLS?

Using capabilities to manage client access privileges on channels

Is it secure to send the access_token as part of the websocket url query params?

For compliance reasons, I need to know how long will Ably store my data for

DOS attack prevention

Cross-platform symmetric encryption offered by the libraries

Can I review Ably's SOC2 report

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Protocol support and protocol adapters

What are Ably protocol adapters and how do they work?

Can you help ease the pain of migration from another Data Stream Network?

Why would I use MQTT over Ably's realtime protocol?

Why would I use SSE over Ably's realtime protocol?

Using the MQTT protocol adapter

Using the Ably Pusher protocol adapter

Do you support the Pusher protocol?

Using the Ably Pubnub protocol adaptor

Do you support the PubNub protocol?

Do you support MQTT? Are you protocol agnostic?

What QoS levels does the MQTT adapter support, and why?

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Data centres

Where are Ably's servers and datacenters located around the world?

Ably architecture design

Why does Ably have concurrent channel limits?

How do I avoid hitting the Max Channel Message Rate Limit?

How is Ably different from Amazon SNS?