Ios

http://blog.funil.de/sinuspl/2008/08/14/cisco-asa-linux-und-qemu/ Notes about ASA 8.02 firmware: after some tricks with hexdump, dd and gzip, the guy was able to extract linux x86 initrd image from

http://ccie-in-3-months.blogspot.com/2010/02/get-your-hands-dirty-with-linux-on.html internal details about Cisco ASR1000 “platform” router, including hardware details (/proc/cpuinfo, dmesg)