I have an ASUS RT-N14U router. According to the documentation it is fully supported, and clear installation instructions are found on the OpenWrt site. However, I didn't manage to install OpenWrt using any of the described methods: not using TFTP, not using ASUS' Firmware Restore Tool, and not by uploading a .trx file through the web interface (the last one was the Padavan firmware, not provided for OpenWrt).
None of these methods worked for me.
For the first two methods (supported according to this site) I have to connect my computer to my router. The router has a WAN port with an RJ14 connector (I think, it is the same as a telephone connector) and 4 LAN ports with a standard network connector, which I think is called RJ45. I can only connect a physical cable to the LAN ports. For the TFTP method (setting the PC's IP to the value specified in the documentation) it simply gives me a "Transfer timed out". With the windows Firmware Restore utility it only seems to upload anything when I use LAN port 4 (the others don't work), and on this port 4 it seems to upload correctly, then install, but finally it fails anyway. After that, the original firmware seems to be unaltered.
For method 2 in the OpenWrt documentation it says to connect to the WAN port (in the ASUS documentation and in the description of method 1 it doesn't). However, due to the format of the socket I cannot connect to it. Is there a way that I could (e.g. with a specially prepared cable)? Would this be the reason I don't manage to load the OpenWrt firmware, or should it have worked with a LAN port as well?
Thanks.