WP7607-1 with Legato 21.05, tcp-server not working as expected

[jyijyi]

Did you capture wireshark log for investigation?

Does this application help?

Networking: TCP server Operation not permitted (errno -1)

You can use my TCP echo server application which uses read() instead of recv(). Procedure: compile and download attached application iptables -I INPUT -j ACCEPT app start fwupdateDownloader in Linux PC, type “nc 192.168.2.2 5000” after connected, you can type some characters and the application will echo back to linux PC. fwupdateDownloader.rar (174.0 KB)