Troubleshooting
Problem
When TCP Syslog connections exceed 2500, ecs-ec-ingress refuses new connections.
Diagnosing The Problem
Look for messages in /var/log/qradar.log similar to:
Mar 19 11:48:05 ::ffff:xxx.xxx.xxx.xxx [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][xxx.xxx.xxx.xxx/- -] [-/- -]TcpSyslog(0.0.0.0/514)refused connection from /xxx.xxx.xxx.xxx:53422
Resolving The Problem
When you initially configure QRadar, the default value for Max Number of TCP Syslog Connections is 2500. Max Number of TCP Syslog Connections is a system-wide variable and affects all hosts in the QRadar deployment. This value can 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 as an Administrator.
-
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.
Performing a Deploy Full Configuration or Restart Event Collection Services results in services being restarted. While services are restarting, event processing stops until services restart. Scheduled reports that are in-progress need to be manually restarted by users. Administrators with strict outage policies are advised to complete these next step during a scheduled maintenance window for their organization.
Related Information
Document Location
Worldwide
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Document Information
Modified date:
05 July 2023
UID
ibm10876690