IPv6 requires ICMPv6 neighbour solicitation and neighbour advertisement packets to create IPv6 connectivity. These packets are used to resolve IPv6 addresses to link-layer (ethernet). Add new icmptypes for neighbour solicitation and neighbour advertisement firewall-cmd --permanent --new-icmptype=neighbour-solicitation firewall-cmd --permanent --new-icmptype=neighbour-advertisement Remove destination IPv4 firewall-cmd --permanent --icmptype=neighbour-solicitation --remove-destination=ipv4 firewall-cmd --permanent --icmptype=neighbour-advertisement --remove-destination=ipv4 Attach icmptypes to the –zone=drop …
Month: January 2021
vsftpd giving error [500 OOPS: child died] instead of [421 Timeout] – after idle_session_timeout
[500 OOPS: child died] is a permanent negative error reply, whereas [421 Timeout] is a temporary negative error reply. Downgrade vsftpd to a lower version to resolve this issue. Check vsftpd man pages for details on Transient Negative Completion reply and Permanent Negative Completion reply.
How to copy an instance between two Openstack environments
Turn off the instance, and then using the nova image-create command, create a snapshot of the nova instance. openstack server list openstack server image create server2 --name server2-snapshot After the snapshot is created, it will be visible at a glance. Confirm snapshot in a glance with; openstack image list Download snapshot image openstack image save …
How to clear ceilometer in OpenStack
To clean up old ceilometer data in OpenStack, perform the following steps: First of all, stop the Telemetry service. systemctl stop openstack-ceilometer-collector openstack-ceilometer-notification openstack-gnocchi-metricd openstack-gnocchi-statsd openstack-aodh-evaluator openstack-aodh-listener openstack-aodh-notifier openstack-ceilometer-central Stop MongoDB service by entering the following on shell prompt. systemctl stop mongod Delete all files in /var/lib/mongodb and then restart MongoDB. cd /var/lib/mongodb rm -r …
