Windows Security Tools

• ntsecurity.nu/toolbox/
  
• Foundstone - Free Tools
  
• @Stake Tools
  
• Sysinternals Utilities
  
• Maresware Forensics
  
• SecureEXE
  

SSH and SSH Tunneling

• FiSSH
  
• Remote Desktop and SSH Tunneling
  
• File Sharing and SSH Tunneling
  

Research

• ARP0c connection interceptor
  
• arp-sk
  
• 
  

Intrusion Detection Systems (IDS)

• Data Sentinel
  
• securityfocus IDS
  
• Intact
  
• ForeScout ActiveScout
  

Defensive Security Links

• Security Operations Guide for Windows 2000 Server
  
• The Packetfactory
  
• Underground Security Research
  
• Encryption and Security-related Resources
  
• sans.org NAT and IPSec
  
• project.honeynet.org/papers/
  
• enteract.com/~lspitz/pubs.html
  
• cert.org/advisories/
  
• cert.org/nav/recovering.html
  
• sans.org/
  
• snort.org/
  
• whitehats.com
  
• neworder.box.sk
  
• linux.box.sk
  
• Linux Security
  
• Linux Security Knowledge Base
  
• Red Hat Linux 7.0 Security Advisories
  
• Open Security Solutions
  
• ftp.cerias.purdue.edu/
  
• adm.freelsd.net/pub/ADM/
  

Offensive Security Links

• insecure.org/nmap/
  
• packetstorm.securify.com
  
• packetstorm.securify.com/sniffers/
  
• ftp.technotronic.com/unix/network-sniffers/
  
• ftp.technotronic.com/unix/trojans/
  

Unix Security Tool Links

• iplog
  
• ippl daemon
  
• Abacus Project
  
• Advanced Color Logs
  

Security Links

• Rhino9
  
• Technotronic.com
  
• GRC.COM
  

Free Network Scanners

• Legion 2.1 - (NetBIOS) A "to the point" utility.
  
• ScanPort - The best "general" port scanner.
  
• NetBrute 1.0 - A good NetBIOS scanner.
  
• GFI: LANguard - NetBIOS, etc..
  

Commerical Network Scanners

• Essential NetTools - Not Free but a great security tool.
  
• Atelier Port Scanner - I wouldn't buy this one.