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https://issues.apache.org/jira/browse/CLOUDSTACK-5278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13839968#comment-13839968
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Jayapal Reddy commented on CLOUDSTACK-5278:
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We can do the following for egress default rules:
1. While implementing network the default egress rule commands to add for both
ALLOW and DENY policy will be send to firewall provider. Also in case of
shutdown network send commands to revoke the rule.
It is up to the provider to implement add/delete rules for. Ex: in case of VR
adding rule for default egress DENY is not needed. So virtual router element
returns true. Other providers palo alto will add the rules.
2. The firewallVO/firewall rule for default egress rule can be get from
network offering egress_default_policy.
> Egress Firewall rules clarifications
> ------------------------------------
>
> Key: CLOUDSTACK-5278
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-5278
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Affects Versions: 4.3.0
> Reporter: Will Stevens
> Assignee: Jayapal Reddy
> Priority: Critical
> Fix For: 4.3.0
>
>
> These issues may also exist in the 4.2 branch, but I am currently
> testing/working on the 4.3 branch.
> I believe these bugs were introduced with the change to the Network Service
> Offering to add the 'Default egress policy' dropdown.
> https://issues.apache.org/jira/browse/CLOUDSTACK-1578
> I am trying to resolve the bugs this change introduced in the Palo Alto
> plugin.
> There are two types of Egress rules (from what I can tell).
> - FirewallRule.FirewallRuleType.System : this appears to be set up by the
> system on network creation to correspond to the global network default
> allow/deny egress rule.
> - FirewallRule.FirewallRuleType.User : any rule that a user creates through
> the UI will get this type.
> There are bugs associated with both of the options in the dropdown (allow and
> deny).
> Case: 'deny'
> - When the network is setup, it does not try to create the global deny rule
> for the network, but it appears to register that it exists. Instead, when
> the first egress rule is created by a user, the system sees both the 'system'
> and 'user' rules, so it will create both rules then.
> Case: both 'allow' and 'deny'
> - The clean up of the network global 'system' egress rules are never done.
> So when a network is deleted, it will leave an orphaned egress rule
> associated with the previous network's cidr. This is bound to cause many
> issues.
> - Even worse, it appears that the ID for the network global 'system' egress
> rule is hardcoded to '0'. Every time I try to spin up a new network it will
> attempt to create a rule with a '0' ID, but since one already exists with
> that ID, there is a config collision. In my case (Palo Alto), the second
> rule with the same ID gets ignored because it checks to see if the rule
> exists and it gets a 'yes' back because the previous network has an egress
> rule with that ID already.
> Let me know if you have additional questions...
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