diff --git a/gns3server/modules/port_manager.py b/gns3server/modules/port_manager.py
index 46b2b114..f3846bd8 100644
--- a/gns3server/modules/port_manager.py
+++ b/gns3server/modules/port_manager.py
@@ -25,7 +25,7 @@ log = logging.getLogger(__name__)
 
 
 # This ports are disallowed by Chrome and Firefox to avoid trouble with skip them
-BANNED_PORTS = set((1, 7,9,11,13,15,17,19,20,21,22,23,25,37,42,43,53,77,79,87,95,101,102,103,104,109,110,111,113,115,117,119,123,135,139,143,179,389,465,512,513,514,515,526,530,531,532,540,556,563,587,601,636,993,995,2049,3659,4045,6000,6665,6666,6667,6668,6669))
+BANNED_PORTS = set((1, 7, 9, 11, 13, 15, 17, 19, 20, 21, 22, 23, 25, 37, 42, 43, 53, 77, 79, 87, 95, 101, 102, 103, 104, 109, 110, 111, 113, 115, 117, 119, 123, 135, 139, 143, 179, 389, 465, 512, 513, 514, 515, 526, 530, 531, 532, 540, 556, 563, 587, 601, 636, 993, 995, 2049, 3659, 4045, 6000, 6665, 6666, 6667, 6668, 6669))
 
 
 class PortManager: