use correct port range delimiter

diff --git a/sfa/openstack/security_group.py b/sfa/openstack/security_group.py
index 99f07f0..4af0e58 100644 (file)
--- a/sfa/openstack/security_group.py
+++ b/sfa/openstack/security_group.py
@@ -24,7 +24,7 @@ class SecurityGroup:
     def _validate_port_range(self, port_range):
         from_port = to_port = None
         if isinstance(port_range, str):
-            ports = port_range.split('-')
+            ports = port_range.split(':')
             if len(ports) > 1:
                 from_port = int(ports[0])
                 to_port = int(ports[1])