After upgrading my Flint 2 to FW 4.5.4 stable, the “opkg update” command always failed ?
Please share the error message with us.
Well, after posting the issue on forum, it’s now working. 
Downloading https://fw.gl-inet.com/releases/v23.05.0/kmod-4.5/aarch64_cortex-a53/mediatek/mt7986/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_core
Downloading https://fw.gl-inet.com/releases/v23.05.0/packages-4.5/aarch64_cortex-a53/glinet/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_gli_pub
Downloading https://fw.gl-inet.com/releases/v23.05.0/packages-4.5/aarch64_cortex-a53/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_packages
Updating database.
Database update completed.
The previous error messages are as below:
root@GL-MT6000:~# opkg update
Downloading https://fw.gl-inet.com/releases/v23.05.0/kmod-4.5/aarch64_cortex-a53/mediatek/mt7986/Packages.gz
Failed to send request: Operation not permitted
*** Failed to download the package list from https://fw.gl-inet.com/releases/v23.05.0/kmod-4.5/aarch64_cortex-a53/mediatek/mt7986/Packages.gz
Downloading https://fw.gl-inet.com/releases/v23.05.0/packages-4.5/aarch64_cortex-a53/glinet/Packages.gz
Failed to send request: Operation not permitted
*** Failed to download the package list from https://fw.gl-inet.com/releases/v23.05.0/packages-4.5/aarch64_cortex-a53/glinet/Packages.gz
Downloading https://fw.gl-inet.com/releases/v23.05.0/packages-4.5/aarch64_cortex-a53/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_packages
Updating database.
Database update completed.
Collected errors:
* opkg_download: Failed to download https://fw.gl-inet.com/releases/v23.05.0/kmod-4.5/aarch64_cortex-a53/mediatek/mt7986/Packages.gz, wget returned 4.
* opkg_download: Check your network settings and connectivity.
* opkg_download: Failed to download https://fw.gl-inet.com/releases/v23.05.0/packages-4.5/aarch64_cortex-a53/glinet/Packages.gz, wget returned 4.
* opkg_download: Check your network settings and connectivity.
