Merge pull request #1624 from Buffet-Overflow/master

Update tun interface instructions to use ip suite

Author: carlospolop

src/generic-hacking/tunneling-and-port-forwarding.md

@@ -87,9 +87,9 @@ You need **root in both devices** (as you are going to create new interfaces) an
 ```bash
 ssh root@server -w any:any #This will create Tun interfaces in both devices
 ip addr add 1.1.1.2/32 peer 1.1.1.1 dev tun0 #Client side VPN IP
-ifconfig tun0 up #Activate the client side network interface
+ip link set tun0 up #Activate the client side network interface
 ip addr add 1.1.1.1/32 peer 1.1.1.2 dev tun0 #Server side VPN IP
-ifconfig tun0 up #Activate the server side network interface
+ip link set tun0 up #Activate the server side network interface
 ```
 
 Enable forwarding on the Server side