DNS Over TLS on OpenWrt 18.06 and 19.07

DNS over TLS encrypts DNS queries so no one between you and the DNS server you’re using (which, by default using these steps, will be Cloudflare’s 1.1.1.1), can tell what DNS queries/responses are being exchanged. DNS over TLS provides confidentiality but not integrity or authenticity. For those, you need to setup DNSSEC which I’ve described … Continue reading DNS Over TLS on OpenWrt 18.06 and 19.07

Spring Boot, HTTPS required, and Elastic Beanstalk health checks

Spring Boot can be very easily configured to require HTTPS for all requests. In application.properties, simply set security.require-ssl=true And that works great – until you’re running the Spring Boot application on AWS Elastic Beanstalk with both HTTP and HTTPS listeners: In that case, Elastic Beanstalk’s health check is always done over HTTP. The configuration page … Continue reading Spring Boot, HTTPS required, and Elastic Beanstalk health checks

One HTTPS site per IP address… or may be not?

I randomly ran across SNI (aka RFC 4366) tonight. It’s a technology that has been under development since before 2000 that allows the client to tell the server what domain it’s visiting before the server sends the certificate. The history is fascinating! The situation today is that SNI is not here yet. OpenSSL will support … Continue reading One HTTPS site per IP address… or may be not?