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McAfee M4050 Troubleshooting Guide - Page 94

Error: Download Failed: Reason 42: Sensor fails to apply new

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McAfee® Network Security Platform 6.0 Utilizing the McAfee Knowledge Base Old Number New Number Topic KB40582 KB56071 Configuring authentication on the Manager for the update server KB41752 KB61131 KB65523 NAI32011 NAI32008 KB56364 KB59347 KB59344 3rd Party Recommended Hardware for Sensors Error: Download Failed: Reason 42: Sensor fails to apply new updates internally(Sensor signature updates fails) Network Security Platform Release Notes (Master List) Sensor is reporting false DOS attacks / New network device is added and Sensor is now reporting DOS attacks Recover the password for the Manager 85

Section	Page
Preface	5
Introducing McAfee Network Security Platform	5
About this Guide	5
Audience	5
Conventions used in this book	6
Related Documentation	7
Contacting Technical Support	8
Information requested for Troubleshooting	8
General information	8
Manager-specific information	9
Sensor issues	9
Signature set issues	9
Before You Install	10
Pre-installation recommendations	10
Planning for installation	10
Functional requirements	11
Install a desktop firewall	11
Using anti-virus software with the Manager	13
McAfee VirusScan and SMTP notification	13
User interface responsiveness	14
Hardening the Manager Server for Windows 2003	15
Introduction	15
Install a desktop firewall	15
Harden the MySQL installation	15
Remove test database	16
Remove local anonymous users	16
Remove remote anonymous users	16
Secure MySQL remote access	17
Remove individual users’ remote access	17
Remove ALL remote access	17
Rolling back your changes	18
Remove debug shell at port 9001	18
Other best practices for securing Manager	18
Hardening the Manager Server for Windows 2008	19
Pre-installation	19
Installation	19
Post Installation	19
Disabling non-required Services	20
Setting System Policies	20
Setting User Policies	20
Setting a Desktop Firewall	20
Configuring Audit Events	21
Troubleshooting Network Security Platform	23
Facilitating troubleshooting	23
Starting your troubleshooting	24
Difficulties connecting Sensor and Manager	24
Network connectivity	24
Inconsistency in Sensor and Manager configuration	24
Software or signature set incompatibility	24
Firewall between the devices	25
Management port configuration	25
Setting the management port speed and duplex mode	26
Connectivity issues between the Sensor and other network devices	26
Duplex mismatches	26
Valid auto-negotiation and speed configurations	26
Gigabit auto-negotiation (no link to connected device)	27
Cisco PIX® Firewall	28
Cisco CSS 11000	28
Cisco Catalyst® 2900XL, 3500XL Series (Hybrid)	28
Cisco Catalyst 4000, 5000, 6000 Series (Native)	28
Connectivity issues with Cisco 3750-12S switch	28
Cisco IOS® for Catalyst 4000, 6000 Series	28
Explanation of CatOS show port Command Counters	29
Auto-negotiation	30
Situations that may lead to Auto-negotiation issues	31
Checking Sensor health	31
Pinging a Sensor	31
Ensuring that the Sensor is receiving traffic	31
Checking Sensor failover status	32
Cabling failover through a network device	32
Checking whether a signature or software update was successful	33
Checking status of a download or upload	33
Conditions requiring a Sensor reboot	33
Rebooting a Sensor via the Manager	34
Rebooting a Sensor using the reboot command	34
Sensor doesn’t boot	34
Debugging critical Sensor issues	34
Loss of connectivity between the Sensor and Manager	38
How Sensor handles new alerts during connectivity loss	39
Manager connectivity to the database	39
Manager database is full	40
Error on accessing the Configuration page	40
Sensor response if its throughput is exceeded	40
MySQL issues	41
How Sensors handle various types of traffic	41
Jumbo Ethernet frames	41
ISL frames	41
Sensor failover issues	42
External fail-open kit issues in connecting to the monitoring port	42
XC cable connection issues for M8000 Sensors	42
Determining False Positives	43
Reducing false positives	43
Tune your policies	43
About false positives and “noise”	44
Incorrect identification	44
Correct identification; significance subject to usage policy	44
Correct identification; significance subject to user sensitivity (also known as noise)	45
Determining a false positive versus noise	45
System Fault Messages	47
Critical faults	47
Error faults	64
Warning faults	70
Informational faults	74
Other faults	85
Error Messages	86
Error messages for RADIUS servers	86
Error messages for LDAP server	87
Using the InfoCollector tool	88
Introduction	88
Running the InfoCollector	89
Using InfoCollector	89
Automatically restarting a failed Manager with Manager Watchdog	90
Introduction	90
How the Manager Watchdog Works	90
Installing Manager Watchdog	91
Starting Manager Watchdog	91
Using Manager Watchdog with Manager in an MDR configuration	91
Tracking Manager Watchdog activities	91
Utilizing the McAfee Knowledge Base	93