diff --git a/config_client.json b/config_client.json
index 3524098..1ca9dc0 100644
--- a/config_client.json
+++ b/config_client.json
@@ -3,5 +3,8 @@
   "address": "127.0.0.1",
   "port": 12345,
   "iface_name": "tun0",
-  "iface_mtu": 1500
+  "iface_mtu": 1500,
+  "iface_addr": "10.0.0.1",
+  "iface_dstaddr": "10.0.0.2",
+  "iface_netmask": "255.255.255.0"
 }
diff --git a/config_server.json b/config_server.json
index 9c14ddc..61b01bb 100644
--- a/config_server.json
+++ b/config_server.json
@@ -3,5 +3,8 @@
   "address": "0.0.0.0",
   "port": 12345,
   "iface_name": "tun1",
-  "iface_mtu": 1500
+  "iface_mtu": 1500,
+  "iface_addr": "10.0.0.2",
+  "iface_dstaddr": "10.0.0.1",
+  "iface_netmask": "255.255.255.0"
 }
diff --git a/main.py b/main.py
index 6542b00..abfdd23 100755
--- a/main.py
+++ b/main.py
@@ -35,10 +35,10 @@ def main():
 
     print(tun_iface.name)
 
-    tun_iface.addr = '10.0.0.1'
-    tun_iface.dstaddr = '10.0.0.2'
-    tun_iface.netmask = '255.255.255.0'
-    tun_iface.mtu = 1500
+    tun_iface.addr    = config['iface_addr']
+    tun_iface.dstaddr = config['iface_dstaddr']
+    tun_iface.netmask = config['iface_netmask']
+    tun_iface.mtu     = config['iface_mtu']
 
     tun_iface.up()