Communications-Electronics Security Group Independently evaluates and certifies the level of trust that may be placed in IT security features. http://www.cesg.gov.uk/
Lance Spitzner Whitepapers Papers on armoring Solaris, Linux and configuring firewalls. http://www.enteract.com/~lspitz/papers.html
Building a Bastion Host Using HP-UX 11 Recipe by Kevin Steves for protecting HP-UX 11. http://secinf.net/unix_security/Building_a_Bastion_Host_Using_HPUX_11.html
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