provider/openstack: ICMP Documentation
Adds a note to the compute_secgroup_v2 documentation to clarify ICMP usage.
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@ -81,3 +81,20 @@ The following attributes are exported:
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* `name` - See Argument Reference above.
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* `name` - See Argument Reference above.
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* `description` - See Argument Reference above.
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* `description` - See Argument Reference above.
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* `rule` - See Argument Reference above.
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* `rule` - See Argument Reference above.
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## Notes
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### ICMP Rules
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When using ICMP as the `ip_protocol`, the `from_port` sets the ICMP _type_ and the `to_port` sets the ICMP _code_. To allow all ICMP types, set each value to `-1`, like so:
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```
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rule {
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from_port = -1
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to_port = -1
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ip_protocol = "icmp"
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cidr = "0.0.0.0/0"
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}
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```
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A list of ICMP types and codes can be found [here](https://en.wikipedia.org/wiki/Internet_Control_Message_Protocol#Control_messages).
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