MQTT with both TLS hostname checking and public/private certificates on nrf9160 with TLS offloaded to modemhttps://devzone.nordicsemi.com/f/nordic-q-a/90132/mqtt-with-both-tls-hostname-checking-and-public-private-certificates-on-nrf9160-with-tls-offloaded-to-modemI&#39;m working towards getting an app derived from MQTT Simple to talk to AWS where I both need to validate the hostname via TLS, and also use public/private certificates to authenticate to the AWS server. MQTT Simple was hard-coded to use a single securityen-USTelligent Community 13Fri, 22 Jul 2022 23:52:58 GMTRE: MQTT with both TLS hostname checking and public/private certificates on nrf9160 with TLS offloaded to modemhttps://devzone.nordicsemi.com/thread/378397?ContentTypeID=1Fri, 22 Jul 2022 23:52:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a7a979d0-2d04-4d5b-8ea5-17040be9e6e0Bill Landolina<p>I was running the February release of the modem firmware.&nbsp; Updating to the June release has fixed everything.&nbsp; Depending on how the certs were fed to the modem with the February firmware I could get Invalid Argument, Connection Refused, or Hang.&nbsp; So far everything I&#39;ve tried with the June firmware works as expected.&nbsp; I&#39;ll be doing more tests on Monday, but I think all&#39;s well.</p><div style="clear:both;"></div>RE: MQTT with both TLS hostname checking and public/private certificates on nrf9160 with TLS offloaded to modemhttps://devzone.nordicsemi.com/thread/378270?ContentTypeID=1Fri, 22 Jul 2022 11:25:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:546f4079-28fc-4d39-81ec-e8839187948fHakon<p>Hello,</p> [quote user=""]What can I do to debug this?[/quote] <p>The first thing you can do is do a modem trace, and upload the trace files here. If you can share the MFW version and NCS version that would also be nice.</p><div style="clear:both;"></div>