Troubleshooting
Problem
QRadar patches install a new kernel version on the system. After the patch reboots the appliance, it boots to a previous kernel instead of the new one recently installed by the patch causing some of the services not to start.
Symptom
The journalctl of the IP tables service reports the following problem:
journalctl -u iptables | grep "iptables.init" -B 1 | tail -n 5
systemd[1]: Starting IPv4 firewall with iptables...
iptables.init[31958]: iptables: Applying firewall rules: iptables-restore: unable to initialize table 'filter'
iptables.init[31958]: Error occurred at line: 17
iptables.init[31958]: Try `iptables-restore -h' or 'iptables-restore --help' for more information.
iptables.init[31958]: [FAILED]
The error "unable to initialize table 'filter'" indicates that the right kernel is not used.
[{"Type":"MASTER","Line of Business":{"code":"LOB77","label":"Automation Platform"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSBQAC","label":"IBM Security QRadar SIEM"},"ARM Category":[{"code":"a8m0z000000cwtdAAA","label":"Upgrade"}],"ARM Case Number":"","Platform":[{"code":"PF016","label":"Linux"}],"Version":"All Versions"}]
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Document Information
Modified date:
21 April 2022
UID
ibm16572877