Troubleshooting
Problem
When TCP Syslog connections exceed 2500, ecs-ec-ingress begins to refuse connections.
Diagnosing The Problem
Look for messages in /var/log/qradar.log similar to:
Mar 19 11:48:05 ::ffff:192.168.1.2 [ecs-ec-ingress.ecs-ec-ingress] [TcpSyslog(0.0.0.0/514) Protocol Provider Thread: class com.q1labs.semsources.sources.tcpsyslog.TcpSyslogProvider0] com.q1labs.semsources.sources.tcpsyslog.TcpSyslogProvider: [INFO] [NOT:0080004100][192.168.1.2/- -] [-/- -]TcpSyslog(0.0.0.0/514)refused connection from /192.168.4.34:53422
Resolving The Problem
When you initially configure QRadar, the default value for Max Number of TCP Syslog connections is 2500. This is a system-wide variable and will affect all hosts in the QRadar deployment. This value should be raised to accommodate the largest number of TCP Syslog log sources sending data.
Note: Increasing the Max Number of TCP Syslog Connections might impact performance if raised to high. Raise the value only to where it resolves the issue.
- Log in to the QRadar UI
-
Open the Admin settings:
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In IBM Security QRadar V7.3.1, click the navigation menu ☰ , and then click Admin to open the Admin tab.
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In IBM Security QRadar V7.3.2, 7.3.0 or earlier, click the Admin tab.
-
- Click the System Settings.
- Click Advanced
- Scroll down to Max Number of TCP Syslog Connections
- Increase the value as needed.
- Click Save
- From the Admin tab, click Advanced > Deploy Full Configuration.
- Click Continue to complete the Deploy process.
- From the Admin tab, click Advanced > Restart Event Collection Services.
Related Information
Document Location
Worldwide
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSBQAC","label":"IBM Security QRadar SIEM"},"Component":"ECS-EC_INGRESS","Platform":[{"code":"PF016","label":"Linux"}],"Version":"7.3.1;7.3.2","Edition":"","Line of Business":{"code":"LOB24","label":"Security Software"}}]
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Document Information
Modified date:
22 March 2019
UID
ibm10876690