IP Securtiy
Shields UP!
Free FireWall test - Securitymetrics.com
Scan OSI Sårbarhetsanalyse - Secunia.com
Symantec Security Check
Mail relay testing
FireWall test
Nessus - The Network Scanner
IDS - Intrusion Detection System
Free antivirus & antispyware
Anti-Virus test-file
Johan Allard Consulting
IPsec - Peter Håkansson