This image will vary based on your router, but let’s assume for this example that you have a LinkSys WRT1900ACS, which requires “ openwrt-15.05.1-mvebu-armada-385-linksys-shelby-squashfs-factory.img” and that you have used your browser to download that into your ‘/home/id/Downloads’ directory. Now put the actual OpenWrt image file you want into the tftp home directory. You should see “hello world” as the result of the last cat command. Now verify that the file content was downloaded: > cat hello.txt Then use the tftp client to connect to the tftp server and download our test file. > sudo echo hello world > /var/lib/tftpboot/hello.txt # ufw allow 69/udp Quick ValidationĬreate a test file in the default tftp home directory. If we needed to modify the configuration, we could edit ‘/etc/default/tftpd-hpa’, but we will use the defaults which make the /var/lib/tftpboot directory readable (but not writeable) to clients.įinally, update the firewall to allow port 69 over UDP. Installationįirst, install the tftp server and client packages: # apt-get install tftpd-hpa tftp-hpa -y I go over full instructions for flashing OpenWrt using Ubuntu and flashing a sysupgrade in another post, this article will focus specifically on setting up a tftp server daemon on Ubuntu that can be used to serve the binary image file. The Trivial File Transfer Protocol ( TFTP) is an extremely simple protocol most often used for network booting strategies, such as PXE and flashing OpenWrt images unto consumer routers.
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