9 Tweets Apr 13, 2023
How to secure Webhooks?
Thread ๐Ÿงต๐Ÿ‘‡
๐Ÿ“Œ What is a webhook?
A webhook is a way for an app to provide other apps with real-time information.
A webhook delivers data to other applications as it happens, meaning you get data immediately.
๐Ÿ“Œ Secure webhooks
You can easily avoid the request being readable by using an HTTPS connection in place of HTTP.
Installing the SSL certificate on the web server that hosts the webhook URL is all that is necessary to accomplish this.
This endpoint is openly accessible. Thus, any application may call it.
Therefore, you should check that the requests your API endpoint receive come from the appropriate source.
You can accomplish this using a quick verification procedure.
๐Ÿ“Œ Authorized IPs list
Utilizing the authorized IPs list is one of the simplest ways to stop others from visiting the URL.
You create firewall rules that, by default, block all access to the webhook URL.
Then you add IP addresses with permitted access to a whitelist.
๐Ÿ“Œ Signature verification strategy
Unfortunately, you can't use this technique in all cases.
You must employ a different security strategy if the webhook URL needs to be accessed by hundreds of unidentified IP addresses.
You can employ a signature verification strategy in this situation.
This is how it works:
The client receives a message from the webhook provider that has been secured using the HMAC cryptography technique.
The HMAC method is used by the client to check the message's validity once it has been received.
It is possible to tell whether a request is legitimate after comparing the derived signature with the one given by the webhook provider.
Hope you enjoyed this thread.
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