vde_tunctl8

Usage

Overview

vde_tunctl allows the host sysadmin to preconfigure a TUN/TAP device for use by a particular user. That user may open and use the device, but may not change any aspects of the host side of the interface.

vde_tunctl is an extension of tunctl.

vde_tunctl defines tap interfaces unless dev-name begins by "tun" or the option -n appears in the command line.

Usage

To create an interface for use by a particular user, invoke tunctl without the -d option:

# vde_tunctl -u someuser  
Set 'tap0' persistent and owned by uid 500 

Then, configure the interface as normal:

# ifconfig tap0 192.168.0.254 up  
# route add -host 192.168.0.253 dev tap0  
# bash -c 'echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp'  
# arp -Ds 192.168.0.253 eth0 pub        

To delete the interface, use the -d option:

# vde_tunctl -d tap0  
Set 'tap0' nonpersistent 

To create or destroy a tun interface (instead of tap):

# vde_tunctl -n -u someuser
Set 'tun0' persistent and owned by uid 500
# vde_tunctl -d tun0
Set 'tun0' nonpersistent