Openvpn – What are the proper routes to push for a bridged OpenVPN server

I've set up an OpenVPN server on a machine with a private IP address of 10.0.0.13. The gateway is at 10.0.0.2, and it hands out 10.0.0.* addresses to other machines on the network. The VPN is set up with bridging. My /etc/network/interfaces file looks like this:

# Bring these interfaces up automatically
auto lo br0

# The loopback network interface
iface lo inet loopback

# The bridge connection
iface br0 inet static
    address         10.0.0.13
    bridge_ports    eth0
    bridge_stp      on
    broadcast       10.0.0.255
    gateway         10.0.0.2
    netmask         255.255.255.0
    network         10.0.0.0

# The primary network interface
iface eth0 inet manual
    up ifconfig $IFACE 0.0.0.0 up
    up ip link set $IFACE promisc on
    down ip link set $IFACE promisc off
    down ifconfig $IFACE down

The server config file (/etc/openvpn/server.conf) looks like this:

port 1194
proto udp
dev tap0
up "/etc/openvpn/up.sh br0"
down "/etc/openvpn/down.sh br0"
ca ca.crt
cert VPNserver.crt
key VPNserver.key
dh dh1024.pem
ifconfig-pool-persist ipp.txt

server-bridge 10.0.0.13 255.255.255.0 10.0.0.200 10.0.0.219
push "route 10.0.0.2 255.255.255.0"

push "redirect-gateway def1 bypass-dhcp"
client-to-client
keepalive 10 120
tls-auth ta.key 0
comp-lzo
max-clients 20
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
log-append  /var/log/openvpn.log
verb 3
crl-verify crl.pem

I think server-bridge and the line below it might be in need of adjustment. Is OpenVPN supposed to be creating a subnet for itself and for connecting clients? At first I was under the impression I could just have OpenVPN assign IP addresses in the same subnet as long as they were outside the router's DHCP range; now I'm not so sure.

Anyway, here are the symptoms of the current config. The client machine (which lives in a 10.6.0.0 network — you'll see this in the output to follow) is able to connect, but only the IP of the OpenVPN server is pingable and I can't browse the web. I'm connecting from a Linux CLI; here's some of the output I get which leads me to believe that routing is the problem. I've bolded the output that seems relevant to me.

Fri Jun  3 12:54:51 2011 [VPNserver] Peer Connection Initiated with [AF_INET]SERVER.PUBLIC.IP.ADDRESS:1194  
Fri Jun  3 12:54:53 2011 SENT CONTROL [VPNserver]: 'PUSH_REQUEST' (status=1)  
Fri Jun  3 12:54:53 2011 PUSH: Received control message: 'PUSH_REPLY,route 10.0.0.2 255.255.255.0,redirect-gateway def1 bypass-dhcp,route-gateway 10.0.0.13,ping 10,ping-restart 120,ifconfig 10.0.0.201 255.255.255.0'  
Fri Jun  3 12:54:53 2011 OPTIONS IMPORT: timers and/or timeouts modified  
Fri Jun  3 12:54:53 2011 OPTIONS IMPORT: --ifconfig/up options modified  
Fri Jun  3 12:54:53 2011 OPTIONS IMPORT: route options modified  
Fri Jun  3 12:54:53 2011 OPTIONS IMPORT: route-related options modified  
Fri Jun  3 12:54:53 2011 ROUTE default_gateway=10.6.0.1  
Fri Jun  3 12:54:53 2011 TUN/TAP device tap0 opened  
Fri Jun  3 12:54:53 2011 TUN/TAP TX queue length set to 100  
Fri Jun  3 12:54:53 2011 /sbin/ifconfig tap0 10.0.0.201 netmask 255.255.255.0 mtu 1500 broadcast 10.0.0.255  
Fri Jun  3 12:54:53 2011 /sbin/route add -net SERVER.PUBLIC.IP.ADDRESS netmask 255.255.255.255 gw 10.6.0.1  
**SIOCADDRT: File exists  
Fri Jun  3 12:54:53 2011 ERROR: Linux route add command failed: external program exited with error status: 7**  
Fri Jun  3 12:54:53 2011 /sbin/route add -net 0.0.0.0 netmask 128.0.0.0 gw 10.0.0.13  
Fri Jun  3 12:54:53 2011 /sbin/route add -net 128.0.0.0 netmask 128.0.0.0 gw 10.0.0.13  
**Fri Jun  3 12:54:53 2011 /sbin/route add -net 10.0.0.2 netmask 255.255.255.0 gw 10.0.0.13
route: netmask doesn't match route address**  
Usage: route [-nNvee] [-FC] [<AF>]           List kernel routing tables  
   route [-v] [-FC] {add|del|flush} ...  Modify routing table for AF.  

   route {-h|--help} [<AF>]              Detailed usage syntax for specified AF.  
   route {-V|--version}                  Display version/author and exit.  

  -v, --verbose            be verbose  
  -n, --numeric            don't resolve names  
  -e, --extend             display other/more information  
  -F, --fib                display Forwarding Information Base (default)  
  -C, --cache              display routing cache instead of FIB  

  <AF>=Use '-A <af>' or '--<af>'; default: inet  
  List of possible address families (which support routing):  
   inet (DARPA Internet) inet6 (IPv6) ax25 (AMPR AX.25)  
   netrom (AMPR NET/ROM) ipx (Novell IPX) ddp (Appletalk DDP)  
   x25 (CCITT X.25)  
**Fri Jun  3 12:54:53 2011 ERROR: Linux route add command failed: external program exited with error status: 4**  
Fri Jun  3 12:54:53 2011 GID set to nogroup  
Fri Jun  3 12:54:53 2011 UID set to nobody  
Fri Jun  3 12:54:53 2011 Initialization Sequence Completed  

So I guess I'm looking to:

1. Make these errors go away
2. Be able to access machines other than the OpenVPN server on the 10.0.0.0 network
3. Route all traffic (web browsing, etc) through the VPN