XP Operating Systems Save
Millions of Products. Read Reviews. XP Operating Systems: Prices.
www.NexTag.co.uk/electronics (sponsored link)
 

GASP! -- Georgetown Automated Solaris Patchtool Save
Automate Sun's Patchdiag tool with a command-line or X-Windows interface.
http://www.georgetown.edu/reillyb/gasp   

GNU Privacy Guard Save
OpenPGP (RFC2440) implementation from the GNU project. Encrypts/decrypts/signs/digests files using strong cryptography. FAQ, downloads, documentation.
http://www.gnupg.org/   

LBNL's Network Research Group Save
Tools such as tcpdump and traceroute.
http://www-nrg.ee.lbl.gov/nrg.html   

LogSurfer Save
Allows improved monitoring and alerting based on the contents of system logs.
http://www.dfn-cert.de/eng/logsurf/   

NMAP Network Scanner Save
Efficient stealth port scanner. Downloads, e-mail lists, news.
http://www.nmap.org/   

North American Cryptography Archives Save
Strong cryptographic software, libraries, and information about cryptography, data security, and privacy.
http://cryptography.org   

OpenSSH - Portable Distribution Save
Open source implementation of SSH1 and SSH2 protocols. Ported from OpenBSD by the OpenSSH portability team.
http://www.openssh.org/portable.html   

OpenSSL Save
The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, fully featured, and Open Source toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols with full-strength cryptography world-wide.
http://www.openssl.org/   

Pidentd Save
Daemon implementing IDENT protocol, it can be used to identify the user who initiated a TCP/IP connection
ftp://ftp.lysator.liu.se/pub/ident/se...   

Postfix Mail Transfer Agent Save
Drop-in Sendmail replacement by Wietse Venema. Offers several features that make it difficult to crack.
http://www.postfix.org   

S4Software Save
Use Secure4Privilege for complete access control to commands and scripts without giving out the root password.
http://www.s4software.com/sg.htm   

SAINT Save
(Security Administrator's Integrated Network Tool) Scans systems and networks and reports potential vulnerabilities.
http://www.wwdsi.com/saint/   

Sudo Save
Run selected commands as root, with the users' own password. Allows the administrator to grant limited root privileges to a subset of users, without giving out the root password.
http://www.sudo.ws/   

Symark Software Save
Execute root-level commands and shell scripts without having to actually login as root. Control which users can log in and under which circumstances.
http://www.symark.com/products.htm   

The Coroner's Toolkit (TCT) Save
The Coroner's Toolkit (TCT) provides post-break-in data collection that could be useful in determining what happened. Less polished that the authors (Dan Farmer and Wietse Venema) usual work, the toolkit offers a patch-work of tools that help exhume interesting stuff from violated systems. Should be installed and examined before a break-in happens!
http://www.porcupine.org/forensics/tc...   

The SUS Home Page Save
SUS is a utility to allow a user (typically a system administrator) to run a single command as the super user.
http://pdg.uow.edu.au/sus/   

Tripwire Inc. Save
Commercial version of the original Unix file integrity scanner. Calculates and stores signatures of file permissions, ownership and contents. Scans the same files later, detecting changes.
http://www.tripwire.com/   

Tripwire Open Source Save
Open source version of the original Unix file integrity scanner. Calculates and stores signatures of file permissions, ownership and contents. Scans the same files later, detecting changes. This open source version is targeted at Linux systems.
http://www.tripwire.org   

lsof Save
lsof is a tool for examining I/O channels open on your Unix system. These can include files, FIFOs and network sockets. This information can be extremely useful for security and a variety of other purposes. Works on most Unix-like systems.
http://freshmeat.net/projects/lsof   

mcrypt Save
A replacement for the unix crypt, using several block algorithms in several modes like cbc, and cfb.
http://hq.hellug.gr/~mcrypt   

sudoscript Save
A pair of Perl scripts that provide an audited root shell using sudo and script(1). Tarballs, RPM's and individual components.
http://www.egbok.com/sudoscript   

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