[Starlingx-discuss] Security Groups (firewall driver) is now enabled by default

[Qin, Kailun]

Hi StarlingX Community,

The neutron OVS firewall_driver driver was previously set to noop since there was no suitable firewall driver packaged. The security group support for OVS agent is now enabled by default with the native "openvswitch" firewall driver [0][1], which is stateful and based on openflow + conntrack implementation [2].

Due to this change, it requires that appropriate security group rules be added to allow ingress traffic to the VM.

1.      List the available security groups and note the ID of the security group that you want to use for your instance:

$ openstack security group list

2.      By default (If you have not created any security groups), the "default" security group applies to all instances and includes firewall rules that deny remote access to instances. For Linux images such as CirrOS, we recommend allowing at least ICMP (ping) and secure shell (SSH).

Add rules to the "default" security group:

a.      Permit ICMP (ping):

$ openstack security group rule create --proto icmp default

b.      Permit secure shell (SSH) access:

$ openstack security group rule create --proto tcp --dst-port 22 default

3.      In addition to the above rules (ICMP, SSH), other security group rules can be created, deleted and listed/showed within a certain security group [3]. And other security groups (besides "default") can also be created/added, removed for a certain VM instance/server [4].

Please kindly update your related StarlingX user docs/test cases w/ steps to apply the appropriate security rules.

Let me know if any question. Thanks a lot.

BR,
Kailun

[0] https://review.openstack.org/#/c/645054/
[1] https://storyboard.openstack.org/#!/story/2002944
[2] https://docs.openstack.org/neutron/latest/contributor/internals/openvswitch_firewall.html
[3] https://docs.openstack.org/python-openstackclient/latest/cli/command-objects/security-group-rule.html
[4] https://docs.openstack.org/python-openstackclient/latest/cli/command-objects/server.html


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