https://devzone.nordicsemi.com/f/nordic-q-a/86002/nrf9160-azura-fota-peer-closed-connection-when-use-blob-sas-urlHi, I am devloping base on azure_fota example and got the Peer closed connection! after used the SAS URL. First, I complete do the FOTA by using the normal URL from blob storage, https://xxx.blob.core.windows.net/xxx/app_update_v0.0.2.bin Then Ien-USTelligent Community 13Wed, 23 Mar 2022 02:45:25 GMThttps://devzone.nordicsemi.com/thread/359477?ContentTypeID=1Wed, 23 Mar 2022 02:45:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d5cfa267-d809-4c29-aa47-85dc8cebc54cRung<p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1648002722881v1.png" alt=" " /></p> <p>I already found the root cause, the receive data is over than recieve buffer.</p> <p>When we use SAS URL which contain many data in header. The return header also filled with many data too.</p> <p>The root cause is&nbsp;the fwFragmentSize which prefer the data size that we need to get from the server&nbsp;plus the&nbsp;header are more than buffer size.</p> <p>So, I just do reduce the&nbsp;fwFragmentSize.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/358962?ContentTypeID=1Sun, 20 Mar 2022 10:03:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e14a656d-3cee-4469-a0cf-277d673adcd9Rung<p>Additional detail, I already test SAS url on postman, it can connect and get 200 respons</p> <p></p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1647770584336v1.png" alt=" " /></p><div style="clear:both;"></div>