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  • By Brad McAllister
    How to Secure Your SIP Trunks with Twilio Secure SIP Trunk

    The world has changed, thanks to the Internet. We are able to collaborate and build quickly and efficiently. But – this phenomenon has also increased the number of security risks and attempts by hackers to extract valuable information.

    Here at Twilio we use Rest APIs which are secure by default. On top of that, our Elastic SIP Trunks can be secured by simply flipping a switch.

    If you have not turned on the secure feature for Elastic SIP Trunk, this post will give you the reasons you should do it. We’ll show you how to enable Secure Trunking and walk through configuring a Cisco Unified Border Element (CUBE) with TLS & SRTP.

    Architecture diagram of secure SIP trunks with a Cisco CUBE

    TLS/SRTP is now included 🎉

    We are now offering this security feature free – all you need to do is flip the switch! Learn about the TLS specification for secure SIP trunking in our docs.

    We have already …

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  • By Brad McAllister
    Build a Serverless Email to SMS Gateway with Twilio and AWS Lambda Serverless Email to SMS

    As a solutions architect at Twilio, I have the opportunity to speak with customers on a daily basis. Each customer has unique requirements and in many cases, a customer is trying to enable SMS notifications for legacy systems that only support email. These customers quickly realize that sending an email to <phone number>@<wireless carrier>.com doesn’t scale.

    Even though creating an application to handle email-to-SMS is very straightforward, the pushback I receive from customers is that they don’t want to maintain a server to host it. In this post, I’ll show you how to create a serverless Email to SMS gateway using a combination of Twilio SendGrid and AWS Lambda.

    How does this SMS gateway work?

    SendGrid accepts the inbound email and triggers a HTTP POST to our AWS API gateway. The payload of the POST request is then processed by Lambda. Using the Twilio helper library, an outbound SMS …

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