Firewall (computing)
In data communications, a firewall is a system for monitoring and blocking unwanted connections to a communications network or individual computer. At its core, a firewall is a "smart" router connecting a secured network to networks whose security cannot be guaranteed, such as the internet.
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Source content checked . English translation published 2026-10-27.
In business automation
A firewall filters incoming and outgoing traffic according to rules. In automation, it limits which addresses can call a webhook or which destinations a process can access.
Examples
These examples illustrate a possible workflow. Adapt the connections and rules to your own systems.
Restricting a store webhook
The endpoint accepts requests only from the store supplier's networks. A request from another source is blocked before the workflow runs. This prevents a random script from creating fake orders.
Relevant tools
- Vercel
- Edge access controls are available; the application still needs to verify webhook signatures instead of relying only on the network.
What to check
- A broad rule that allows the entire world in removes the benefit, even if the firewall is enabled.