1: successfully installed Graylog on centos7 platform where i can access graylog Dashboard.
2: But unable to add my 4 remote server which is based on Linux but hosted at different data center so please suggest me how can i do it, i already did below steps:
/etc/rsyslog.d/90-graylog2.conf with below content
$template GRAYLOGRFC5424,"%protocol-version% %timestamp:::date-rfc3339% %HOSTNAME% %app-name% %procid% %msg%\n" *.* @22.214.171.124:1514;GRAYLOGRFC5424
also restart rsyslog service and allow the necessary port from IPTABLES.