Скачать или смотреть ONELAB TRAINING- Setup Centos 8 syslog server for Cisco Devices

Creating GNS3 Topology
Configure Centos 8 server:
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Steps:
1-Create custome rsyslog configuration file:
vim /etc/rsyslog.d/cisco.conf
module(load="imudp") # needs to be done just once
input(type="imudp" port="514")
$template DynaFile,"/var/log/%FROMHOST-IP%/%syslogfacility-text%.log"
. -?DynaFile
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2-Restart rsyslog service:
systemctl restart rsyslog
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3-Ebable udp port 514 through firewall
firewall-cmd --add-port=514/udp --permanent
firewall-cmd --reload
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Configure Cisco Devices to forward llog message to syslog server