Sorry about this very late answer. Summer holidays.
The solution using USB0 is not viable since USB0 is on a PPP connection.
I found a solution using a firewall and DHCP.
Best regards
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Question
Linux bridging UMTS <-> eth0
Hi
I am setting up a bridg for use wit a UMTS USB modem (ubuntu 9.04)
I want the following solution:
roaming gprs modem | <=USB0=> | ppp0 ubuntu server br0 | eth0
I have testet with this solution (/etc/network/interfaces) without any luck.
auto lo
iface lo inet loopback
# Configure br0 using ifupdown with dhcp and add eth0 to the bridge
auto br0
iface br0 inet dhcp
bridge_ports eth0
# udev calls ifupdown for usb0 when it is created and destroyed. See /etc/udev/rules.d/85-ifupd
# Tell ifupdown not to assign an IP address and add it to the bridge.
auto usb0
iface usb0 inet manual
up ifconfig $IFACE 0.0.0.0 up
post-up brctl addif br0 usb0
> brctl show shows ony the one endpoint (eth0)
Have anyone a pointer or a solution to this?
RGDS
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by: OliverRahnerPosted on 2009-07-02 at 07:59:24ID: 24764088
Try the following, for diagnosis:
- bring up your UMTS-connection
- note the IP address of usb0
- enter the following commands:
ifconfig br0 #.#.#.# #.#.#.# (ip adress and subnet mask of usb0)
ifconfig usb0 0.0.0.0
- add usb0 manually to the bridge
brctl addif br0 usb0