Over the past couple of days, I've been trying to take a poke at my router's firmware, (purely out of interest, to see how everything ticks), and I have a .img file (the 1.5SKY-mod.img was the only one I could find), however I'm having trouble mounting the image to look inside.

I have tried cramfs, which seems to be used in a lot of firmware files, but with no luck. Squashfs doesn't seem to work either, and I'm beginning to wonder if it isn't even a filesystem, and just some kind of compressed file. I did notice the plaintext-ish header at the start of the file though.

I noticed there were a few people poking around the firmware on these forums, so if anyone could point me in the right direction, it would be much appreciated.