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I recommend doing this with a udev rule. I put this in /etc/udev/rules.d/81-bridge.rules: ACTION=="add", SUBSYSTEM=="net", NAME=="virbr*", RUN+="/sbin/ethtool -K $env{INTERFACE} tx off" More sophisticated approaches are possible, depending on your needs.


It's possble that your ISP's device doesn't give DHCP addresses to a MAC address which is not directly connected to it. You'd need to call your ISP to confirm this. If so, you could use ebtables to spoof the MAC of the VM, like this: http://wiki.debian.org/BridgeNetworkConnections


Several things: When you use sparse images, they will grow when the VM writes data into the disks. A snapshot is a new sparse image, able to grow to the same size as the original. So if you take a 10Gb disk, fill it up to 10Gb, and then snapshot it, the snapshot will also be able to grow to 20Gb. In the long run, this is always a problem, which is one of ...


Finally I was able to solve this issue through OpenVPN tunnel mechanism. So for reference I am putting the solution. This could be one of it as there could be more. Install Epel RPM and then install openvpn package as yum install openvpn. Now modify the sample bridge-start script (can be found in /usr/share/doc/openvpn/sample-scripts as below //!/bin/bash ...

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