I would like to bridge between br0
and tap0
for my OpenVPN server, but I get the error at the bottom of this post.
Background
The server have one physical eth0
with IP xxx.xxx.68.58
.
The bridge should have xxx.xxx.85.5
and the tap0
NIC, where the OpenVPN clients gets an IP from is in the range xxx.xxx.85.50
- xxx.xxx.85.100
.
To make the bridge I do:
#!/bin/bash
br="br0"
tap="tap0"
eth="eth0:0"
eth_ip="xxx.xxx.85.5"
eth_netmask="255.255.255.0"
eth_broadcast="255.255.71.255"
openvpn --mktun --dev $tap
brctl addbr $br
brctl addif $br $eth
brctl addif $br $tap
ifconfig $tap 0.0.0.0 promisc up
echo "debug"
ifconfig $eth 0.0.0.0 promisc up
echo "debug"
ifconfig $br $eth_ip netmask $eth_netmask broadcast $eth_broadcast
but get this error;
Tue Sep 13 10:40:46 2011 TUN/TAP device tap0 opened
Tue Sep 13 10:40:46 2011 Persist state set to: ON
debug
SIOCSIFFLAGS: Cannot assign requested address
SIOCSIFFLAGS: Cannot assign requested address
SIOCSIFFLAGS: Cannot assign requested address
debug
What am I doing wrong?
Update
With set -vx
added in the top of the script, I get:
br="br0"
+ br=br0
tap="tap0"
+ tap=tap0
eth="eth0:0"
+ eth=eth0:0
eth_ip="xxx.xxx.85.5"
+ eth_ip=xxx.xxx.85.5
eth_netmask="255.255.255.0"
+ eth_netmask=255.255.255.0
eth_broadcast="255.255.71.255"
+ eth_broadcast=255.255.71.255
openvpn --mktun --dev $tap
+ openvpn --mktun --dev tap0
Tue Sep 13 11:42:33 2011 TUN/TAP device tap0 opened
Tue Sep 13 11:42:33 2011 Persist state set to: ON
brctl addbr $br
+ brctl addbr br0
brctl addif $br $eth
+ brctl addif br0 eth0:0
brctl addif $br $tap
+ brctl addif br0 tap0
ifconfig $tap 0.0.0.0 promisc up
+ ifconfig tap0 0.0.0.0 promisc up
ifconfig $eth 0.0.0.0 promisc up
+ ifconfig eth0:0 0.0.0.0 promisc up
SIOCSIFFLAGS: Cannot assign requested address
SIOCSIFFLAGS: Cannot assign requested address
SIOCSIFFLAGS: Cannot assign requested address
ifconfig $br $eth_ip netmask $eth_netmask broadcast $eth_broadcast
+ ifconfig br0 xxx.xxx.85.5 netmask 255.255.255.0 broadcast 255.255.71.255