Adding initial file structure and list def rules
diff --git a/openstack/compute/v2/extensions/defsecrules/doc.go b/openstack/compute/v2/extensions/defsecrules/doc.go
new file mode 100644
index 0000000..2571a1a
--- /dev/null
+++ b/openstack/compute/v2/extensions/defsecrules/doc.go
@@ -0,0 +1 @@
+package defsecrules
diff --git a/openstack/compute/v2/extensions/defsecrules/fixtures.go b/openstack/compute/v2/extensions/defsecrules/fixtures.go
new file mode 100644
index 0000000..0b11338
--- /dev/null
+++ b/openstack/compute/v2/extensions/defsecrules/fixtures.go
@@ -0,0 +1,38 @@
+package defsecrules
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	th "github.com/rackspace/gophercloud/testhelper"
+	fake "github.com/rackspace/gophercloud/testhelper/client"
+)
+
+const rootPath = "/os-security-group-default-rules"
+
+func mockListRulesResponse(t *testing.T) {
+	th.Mux.HandleFunc(rootPath, func(w http.ResponseWriter, r *http.Request) {
+		th.TestMethod(t, r, "GET")
+		th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+
+		w.Header().Add("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+
+		fmt.Fprintf(w, `
+{
+  "security_group_default_rules": [
+    {
+      "from_port": 80,
+      "id": "f9a97fcf-3a97-47b0-b76f-919136afb7ed",
+      "ip_protocol": "TCP",
+      "ip_range": {
+        "cidr": "10.10.10.0/24"
+      },
+      "to_port": 80
+    }
+  ]
+}
+      `)
+	})
+}
diff --git a/openstack/compute/v2/extensions/defsecrules/requests.go b/openstack/compute/v2/extensions/defsecrules/requests.go
new file mode 100644
index 0000000..66337a5
--- /dev/null
+++ b/openstack/compute/v2/extensions/defsecrules/requests.go
@@ -0,0 +1,15 @@
+package defsecrules
+
+import (
+	"github.com/rackspace/gophercloud"
+	"github.com/rackspace/gophercloud/pagination"
+)
+
+// List will return a collection of default rules.
+func List(client *gophercloud.ServiceClient) pagination.Pager {
+	createPage := func(r pagination.PageResult) pagination.Page {
+		return DefaultRulePage{pagination.SinglePageBase(r)}
+	}
+
+	return pagination.NewPager(client, rootURL(client), createPage)
+}
diff --git a/openstack/compute/v2/extensions/defsecrules/requests_test.go b/openstack/compute/v2/extensions/defsecrules/requests_test.go
new file mode 100644
index 0000000..af12796
--- /dev/null
+++ b/openstack/compute/v2/extensions/defsecrules/requests_test.go
@@ -0,0 +1,42 @@
+package defsecrules
+
+import (
+	"testing"
+
+	"github.com/rackspace/gophercloud/openstack/compute/v2/extensions/secgroups"
+	"github.com/rackspace/gophercloud/pagination"
+	th "github.com/rackspace/gophercloud/testhelper"
+	"github.com/rackspace/gophercloud/testhelper/client"
+)
+
+func TestList(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	mockListRulesResponse(t)
+
+	count := 0
+
+	err := List(client.ServiceClient()).EachPage(func(page pagination.Page) (bool, error) {
+		count++
+		actual, err := ExtractDefaultRules(page)
+		th.AssertNoErr(t, err)
+
+		expected := []DefaultRule{
+			DefaultRule{
+				FromPort:   80,
+				ID:         "f9a97fcf-3a97-47b0-b76f-919136afb7ed",
+				IPProtocol: "TCP",
+				IPRange:    secgroups.IPRange{CIDR: "10.10.10.0/24"},
+				ToPort:     80,
+			},
+		}
+
+		th.CheckDeepEquals(t, expected, actual)
+
+		return true, nil
+	})
+
+	th.AssertNoErr(t, err)
+	th.AssertEquals(t, 1, count)
+}
diff --git a/openstack/compute/v2/extensions/defsecrules/results.go b/openstack/compute/v2/extensions/defsecrules/results.go
new file mode 100644
index 0000000..ae46b59
--- /dev/null
+++ b/openstack/compute/v2/extensions/defsecrules/results.go
@@ -0,0 +1,37 @@
+package defsecrules
+
+import (
+	"github.com/mitchellh/mapstructure"
+
+	"github.com/rackspace/gophercloud/openstack/compute/v2/extensions/secgroups"
+	"github.com/rackspace/gophercloud/pagination"
+)
+
+type DefaultRule secgroups.Rule
+
+// DefaultRulePage is a single page of a DefaultRule collection.
+type DefaultRulePage struct {
+	pagination.SinglePageBase
+}
+
+// IsEmpty determines whether or not a page of default rules contains any results.
+func (page DefaultRulePage) IsEmpty() (bool, error) {
+	users, err := ExtractDefaultRules(page)
+	if err != nil {
+		return false, err
+	}
+	return len(users) == 0, nil
+}
+
+// ExtractDefaultRules returns a slice of DefaultRules contained in a single
+// page of results.
+func ExtractDefaultRules(page pagination.Page) ([]DefaultRule, error) {
+	casted := page.(DefaultRulePage).Body
+	var response struct {
+		Rules []DefaultRule `mapstructure:"security_group_default_rules"`
+	}
+
+	err := mapstructure.Decode(casted, &response)
+
+	return response.Rules, err
+}
diff --git a/openstack/compute/v2/extensions/defsecrules/urls.go b/openstack/compute/v2/extensions/defsecrules/urls.go
new file mode 100644
index 0000000..cc928ab
--- /dev/null
+++ b/openstack/compute/v2/extensions/defsecrules/urls.go
@@ -0,0 +1,13 @@
+package defsecrules
+
+import "github.com/rackspace/gophercloud"
+
+const rulepath = "os-security-group-default-rules"
+
+func resourceURL(c *gophercloud.ServiceClient, id string) string {
+	return c.ServiceURL(rulepath, id)
+}
+
+func rootURL(c *gophercloud.ServiceClient) string {
+	return c.ServiceURL(rulepath)
+}