IBM Support

QRadar: Windows forwarder causes excessive "TcpSyslog read failed, connection reset from" messages in logs



A windows forwarder causes excessive number of messages to be received with an error "read failed, connection reset" are coming in from TCP syslog log sources.


Look in /var/log/qradar.log for messages similar to:
Aug 28 11:00:56 [TcpSyslog( Protocol Provider Thread
: class com.q1labs.semsources.
sources.tcpsyslog.TcpSyslogProvider0] com.q1labs.semsources.sources.tcpsyslog.TcpSyslogProvider: 
[INFO][NOT:0000006000][10.10.x.x/- -] [-/- -]TcpSyslog( read failed, 
connection reset from 10.10.x.x

Resolving The Problem

The excessive "read failed, connection reset" messages was the result of an administrator creating a TCP syslog forwarder by using a PowerShell script on a Windows™ server. These types of messages are common when TCP connections are created with each payload from a Log Source. Administrators need to ensure that each Log Source uses one Log Source connection for payloads. If an administrator creates a scripted Log Source, it must use rfc5424 for Syslog Protocol.

To resolve this issue, use a Log Source that does not open a new connection with every payload. Refer to the forums for help creating scripted or custom Log Sources.

Document Location


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Document Information

Modified date:
28 July 2020