: Some firmware versions have documented issues with VPN connectivity, where the connection fails or hangs despite having correct settings. Custom Firmware Options [OpenWrt Wiki] TP-Link Archer C5 v4
upgrade over Wi-Fi, as a connection drop could corrupt the firmware. Back Up Settings: System Tools > Backup & Restore tp-link archer c5 v4 firmware upgrade
If your router supports Cloud services, you can often update directly through the web interface or the . : Some firmware versions have documented issues with
There are two common methods: (recommended) and TP-Link Tether App . tp-link archer c5 v4 firmware upgrade