Event ID 4981 – IPsec Main Mode and Extended Mode Security Associations were Established
Event ID | 4981 |
Category | Logon/Logoff |
Sub-Category | Audit IPsec Extended Mode |
Description | IPsec Main Mode and Extended Mode security associations were established. |
Event 4981 is generated when both IPsec Main Mode and IPsec Extended Mode security associations are established.
Example of 4981 log:
IPsec Main Mode and Extended Mode security associations were established.
Local Endpoint:
Principal Name: %1
Network Address: %9
Keying Module Port: %10
Local Certificate:
SHA Thumbprint: %2
Issuing CA: %3
Root CA: %4
Remote Endpoint:
Principal Name: %5
Network Address: %11
Keying Module Port: %12
Remote Certificate:
SHA Thumbprint: %6
Issuing CA: %7
Root CA: %8
Cryptographic Information:
Cipher Algorithm: %13
Integrity Algorithm: %14
Diffie-Hellman Group: %15
Security Association Information:
Lifetime (minutes): %16
Quick Mode Limit: %17
Main Mode SA ID: %21
Additional Information:
Keying Module Name: AuthIP
Authentication Method: SSL
Role: %18
Impersonation State: %19
Main Mode Filter ID: %20
Extended Mode Information:
Local Principal Name: %22
Remote Principal Name: %23
Authentication Method: %24
Impersonation State: %25
Quick Mode Filter ID: %26
Why does event ID 4981 need to be monitored?
Security events which fall under the Audit IPsec Extended Mode subcategory are monitored primarily for IPsec Extended Mode troubleshooting.
Pro Tip:
With in-depth reports, real-time alerts, and graphical displays, ADAudit Plus tracks all IPsec security associations, helping you meet your security, operational, and compliance needs with absolute ease.
Event 4981 applies to the following operating systems:
- Windows Server 2016
- Windows 10
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