Some people might say that many of these precautions are over the top and paranoid. I don’t consider myself an “elite hacker”, but I know that I could pull off most of the attacks that I’ve discussed above without much trouble. Cold boot and Evil maid are practical, easy to pull off, attacks. Why wouldn’t I defend against them?
via Protecting a Laptop from Simple and Sophisticated Attacks | Mike Cardwell, Online.
After some searching, i found out that there is a device manager for the Linux kernel named “udev” which remembers the settings from the NIC of the virtual machine before it was cloned. To fix the issue simply delete the the following file and it will be regenerated properly on reboot.
/etc/udev/rules.d/70-persistent-net.rules
via Random IT Stuff » ‘Device eth0 does not seem to be present’ error after cloning a linux machine.
This worked for me with a VirtualBox clone that was giving me problems. Google is simply an amazing resource! And kudos to the linked site for coming up first with a no nonsense answer.
vmware – How to convert flat disk image to vmdk? – Stack Overflow.
apt-get qemu (installs QEMU on debian/ubuntu)
qemu-img convert imagefile.dd -O vmdk vmdkname.vmdk
I’m assuming a flat disk image is a dd-style image. The convert operation also handles numerous other formats.
Ultra Monkey is a project to create load balanced and highly available network services. For example a cluster of web servers that appear as a single web server to end-users. The service may be for end-users across the world connected via the internet, or for enterprise users connected via an intranet.
via Ultra Monkey:.
The Linux Virtual Server is a highly scalable and highly available server built on a cluster of real servers, with the load balancer running on the Linux operating system. The architecture of the server cluster is fully transparent to end users, and the users interact as if it were a single high-performance virtual server. For more information, click here.
via The Linux Virtual Server Project – Linux Server Cluster for Load Balancing.
The Linux Virtual Server Project (LVS) allows load balancing of networked services such as web and mail servers using Layer 4 Switching. It is extremely fast and allows such services to be scaled to service 10s or 100s of thousands of simultaneous connections. The purpose of this tutorial is to demonstrate how to use various features of LVS to load balance Internet services, and how this can be made highly available using tools such as such as heartbeat and keepalived. It will also cover more advanced topics which have been the subject of recent development including maintaining active connections in a highly available environment and using active feedback to better distribute load.
This article illustrates the robust Apache Web server stack with 6 Apache server nodes (though 3 nodes is sufficient for following the steps outlined here) as well as 3 Linux Virtual Server (LVS) directors. We used 6 Apache server nodes to drive higher workload throughputs during testing and thereby simulate larger deployments
Others just use off-the-shelf distributions and pay consultants to tweak the settings for maximum performance. Red Hat Enterprise Linux is now the dominant Linux distribution among exchanges, Lameter said. Red Hat counts among its customers the Chicago Mercantile Exchange, New York Mercantile Exchange, Frankfurt Stock Exchange, Eurex derivative exchange and Philippine Stock Exchange.
This is a filesystem client based on the SSH File Transfer Protocol. Since most SSH servers already support this protocol it is very easy to set up: i.e. on the server side there’s nothing to do. On the client side mounting the filesystem is as easy as logging into the server with ssh.
The idea of sshfs was taken from the SSHFS filesystem distributed with LUFS, which I found very useful. There were some limitations of that codebase, so I rewrote it. Features of this implementation are:
- Based on FUSE (the best userspace filesystem framework for linux 😉
- Multithreading: more than one request can be on it’s way to the server
- Allowing large reads (max 64k)
- Caching directory contents
via SSH Filesystem.