Cisco

http://www.howtoforge.com/how-to-set-up-a-cisco-lab-on-linux-centos5.2

http://www.howtoforge.com/how-to-set-up-a-cisco-lab-on-linux-centos5.2

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/vcallcon/ps7194/product_data_sheet0900aecd805c3cc1.pdf Cisco Service Node for Linksys One – integrated solution for linksys voip CPE (registration, services, provisioning), consists of cisco network gear (chassis + console server ) , 2 HP DL G380G4 servers + MSA100 storage / FreeBSD, PostgreSQL, OpenSER, NET-SNMP, DIND DNL (Dynamically-Loadable Zone)

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)

http://ask.slashdot.org/comments.pl?sid=1489564&cid=30547976 slashdot comments on the topic listing useful network testing and emulation tools

http://www.shrew.net/download An alternative to CiscoVPN Client, which is, sadly, is known not to work on 64bit versions of windows xp/vista/7.

http://www.informit.com/articles/article.aspx?p=424447 actually a good article explaining issues with ntp and login config for asa and pixes

http://sourceforge.net/projects/pixla/ oss pix log analyzer

http://jeremy.chartier.free.fr/snortalog/what_is_snortalog.html open source software that does firewall log analisys, stats and reporting