cpanel_chkservd · 03:14HIGHservice down · server.example.com
mysqld failed to start: innodb_buffer_pool_size 16G exceeds 12.96 GB available RAM.
Fix slow log permissionsdone
chmod 640 /var/log/mariadb/mariadb-slow.log
Reduce InnoDB buffer pool to 8Gdone
sed -i 's/^innodb_buffer_pool_size=.*/innodb_buffer_pool_size=8G/' /etc/my.cnf.d/server.cnf
Restart mariadbdone
systemctl restart mariadb
auth brute force · server.example.com
8,127 failed sshd auth attempts in 5 min from a single attacker subnet, four source ASNs.
Block attacker subnet via CSFdone
csf -d 203.0.113.0/24 "SSH brute force - SGuard auto"
Whitelist admin IP (idempotent)done
csf -a 198.51.100.10 "Admin - SGuard auto"
node_exporter · 04:02CRITICALdisk full · server.example.com
/backup at 96% (331 GB used). 7 backup sets present; oldest 4 = 170 GB. Retention policy: keep last 3.