diff --git a/xos/core/models/slice.py b/xos/core/models/slice.py
index 2679eb7..12c1ea2 100644
--- a/xos/core/models/slice.py
+++ b/xos/core/models/slice.py
@@ -32,6 +32,7 @@
     max_instances = models.IntegerField(default=10)
     service = models.ForeignKey(Service, related_name='slices', null=True, blank=True)
     network = models.CharField(null=True, blank=True, max_length=256, choices=NETWORK_CHOICES)
+    exposed_ports = models.CharField(null=True, blank=True, max_length=256)
     tags = generic.GenericRelation(Tag)
     serviceClass = models.ForeignKey(ServiceClass, related_name = "slices", null=True, default=get_default_serviceclass)
     creator = models.ForeignKey(User, related_name='slices', blank=True, null=True)
diff --git a/xos/tosca/custom_types/xos.m4 b/xos/tosca/custom_types/xos.m4
index 0c817c9..20a537a 100644
--- a/xos/tosca/custom_types/xos.m4
+++ b/xos/tosca/custom_types/xos.m4
@@ -663,6 +663,10 @@
                 type: string
                 required: false
                 description: type of networking to use for this slice
+            exposed_ports:
+                type: string
+                required: false
+                description: comma-separated list of protocol _space_ port that represent ports the slice should expose
 
     tosca.nodes.Node:
         derived_from: tosca.nodes.Root
diff --git a/xos/tosca/custom_types/xos.yaml b/xos/tosca/custom_types/xos.yaml
index a4f5d97..1b5db39 100644
--- a/xos/tosca/custom_types/xos.yaml
+++ b/xos/tosca/custom_types/xos.yaml
@@ -920,6 +920,10 @@
                 type: string
                 required: false
                 description: type of networking to use for this slice
+            exposed_ports:
+                type: string
+                required: false
+                description: comma-separated list of protocol _space_ port that represent ports the slice should expose
 
     tosca.nodes.Node:
         derived_from: tosca.nodes.Root
diff --git a/xos/tosca/resources/slice.py b/xos/tosca/resources/slice.py
index ca11b77..7dcbd59 100644
--- a/xos/tosca/resources/slice.py
+++ b/xos/tosca/resources/slice.py
@@ -12,7 +12,7 @@
 class XOSSlice(XOSResource):
     provides = "tosca.nodes.Slice"
     xos_model = Slice
-    copyin_props = ["enabled", "description", "slice_url", "max_instances", "default_isolation", "network"]
+    copyin_props = ["enabled", "description", "slice_url", "max_instances", "default_isolation", "network", "exposed_ports"]
 
     def get_xos_args(self):
         args = super(XOSSlice, self).get_xos_args()