If you can't connect to a Stripe Terminal Smart reader from your point-of-sale device using one of the Terminal sdks, your network might have a firewall blocking the protocols and ports the devices use to connect to the readers.

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This doesn't apply if you're using our mobile readers (Wisepad3, Stripe reader M2), or using our server-driven integration with our smart readers (WisePOS E, S700).

Make sure the following protocols, ports, and IP addresses are allowlisted within your LAN:

• TCP port 4443
• TCP port 443 (HTTPS)
• UDP port 53 (DNS)

Additionally, allow all Stripe domains within your firewall settings. If you're prompted with Set Network Location on a Windows computer, select the Work option. Selecting Home will block the network connections required for Stripe Terminal to function.

Additional information

• The Stripe Terminal SDK is encountering missing certificate errors when connecting to an Internet Reader
• Ensuring Stripe Terminal JavaScript SDK Functionality on macOS 15