Quick Reference Links

• NTP Servers and Info
• Subnet Cheatsheet

Online DNS & IP Tools

• MyNetworkTest.com
• CentralOps Domain Dossier
• IP Tools
• InfoSysSec IP Tools
• GRC Port Probe

Mail & Webserver Tools

• SMTP Test by ZoneEdit.com
• Exchange Server Remote Connectivity Analyzer
• Blacklist Check by DNSbl.info
• Blacklist Check by MXToolbox.com
• Blacklist Check by RobTex.com
• Barracuda Reputation Lookup
• Webserver OS detection and history

Speed Tests

• Speedtest.net
• SpeakEasy
• AT&T Speedtest

Hacker & InfoSec Cons

• BlackHat – Las Vegas, NV
• Defcon – Las Vegas, NV
• Phreaknic – Nashville, TN