According to one of the most respected gaming reporters in the business, federal legislation that would regulate and legalize the online poker industry in the United States is more than likely shut down until 2013 at the earliest.

On his Twitter account Friday afternoon, Las Vegas Review-Journal reporter Howard Stutz chirped to his readers, “One Wall Street analyst opinion: Internet poker legalization not being attached to the payroll tax bill means the issue is dead for 2012.” Stutz was discussing the recent legislation in Congress regarding the Payroll Tax Extension bill, which many had rumored could potentially feature online poker regulations as a “rider” in much the same manner as the original Unlawful Internet Gaming Enforcement Act (UIGEA) was passed in 2006. However, expectations of that rider were tamped down earlier in the week.

$ apt-cache show tcpdump
Package: tcpdump
Priority: standard
Section: net
Installed-Size: 1060
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Romain Francoise <rfrancoise@debian.org>
Architecture: amd64
Version: 4.1.1-2ubuntu2
Depends: libc6 (>= 2.7), libpcap0.8 (>= 1.0.0), libssl1.0.0 (>= 1.0.0)
Suggests: apparmor (>= 2.3)
Filename: pool/main/t/tcpdump/tcpdump_4.1.1-2ubuntu2_amd64.deb
Size: 393778
MD5sum: 9da2f2e39c365aef92a7ddf39edf4720
SHA1: 15426551551032bf10801309fb938165b2aec47f
SHA256: 71072e8c0a29f04b9499229c04aa0b62d2022ceeff5f9a3d9770d8b9124b63b3
Description-en: command-line network traffic analyzer
 This program allows you to dump the traffic on a network. tcpdump
 is able to examine IPv4, ICMPv4, IPv6, ICMPv6, UDP, TCP, SNMP, AFS
 BGP, RIP, PIM, DVMRP, IGMP, SMB, OSPF, NFS and many other packet
 types.
 .
 It can be used to print out the headers of packets on a network
 interface, filter packets that match a certain expression. You can
 use this tool to track down network problems, to detect attacks
 or to monitor network activities.
Homepage: http://www.tcpdump.org/
Description-md5: f01841bfda357d116d7ff7b7a47e8782
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 18m
Task: standard, kubuntu-mobile

LATEST RELEASE
Version: 4.2.1 / 1.2.1
Release Date: January 1, 2012
tcpdump-4.2.1.tar.gz (changelog) (PGP signature)
libpcap-1.2.1.tar.gz (changelog) (PGP signature)
tcpdump-workers.asc (tcpdump.org signing key)

I checked the libpcap README and there were no dependencies listed.
My bad, brain fade, I was thinking of p2pool when I wrote that. For compiling, I wanted one example that lists dependencies and one that didn't.

There’s an interesting back-and-forth going on at Thingiverse, a site founded by Makerbot to share 3D projects. Two designers have made two parts for the AR-15 rifle platform. The first part is a standard rifle magazine complete with spring but the second part is AR-15 lower receiver.

Why are these parts important? Well, the magazine is just on the edge of Thinigverse’s implied (but not concrete) “no weapons” philosophy but the lower receiver is something else entirely. It is the only part of the AR-15 that you need a license to buy.

Initially, when we first connected 13 GPUs, the system refused to boot. After discussing this with ASUS, we concluded that the problem was that the GPUs required a larger block of physical address space than the BIOS was able to provide. The 32 bit BIOS can only map the PCI devices (including PCI-E) below the 4GB boundary, so this meant there was at most roughly 3GB of address space available for the devices. Because each GPU requires a block of 16MB, a block of 32MB and a block of 256MB, only 8 or 9 GPUs worked, depending on how many on-board devices we disabled in the BIOS setup. Adding more cards than that caused a boot failure.

ASUS was extremely helpful with solving this, and they provided a custom BIOS for our motherboard that skipped the address space allocation of the GTX295 cards entirely.  This is also the reason we have a single GTX275 card in the FASTRA II: it is the one card that is fully initialized by the BIOS and can provide graphics output to the monitor.

With this custom BIOS, the system booted successfully, but without working GTX295 cards since those were not initialized yet. To enable these cards, we modified a Linux 2.6.29.1 kernel (the latest at the time) to allocate physical address space to the GPUs manually. Since the kernel is 64-bit, we could map the large 256MB resource blocks above the 4GB boundary, thereby ensuring there was plenty of room for them. The smaller 16MB and 32MB blocks easily fit below 4GB, where the GPU required them.

The remaining problem was unexpected: each GPU requires a block of 4KB of I/O port space, for which only 64KB is reserved in total. Together with low-level system devices and devices like network and USB controllers also taking up I/O space this was a very tight fit. We needed to re-map inefficiently allocated system devices and disable as many devices as possible entirely, such as the RAID controller and the second network controller. From later experiments we suspect it might actually only be necessary to allocate this 4KB block of I/O ports for the primary VGA controller, but we haven’t verified that.

The solution lies in iptables!

There is an experimental target (ROUTE) which offers an option (--tee) that behaves like the good old linux “tee” command.  It copies a packet to a target ip address and then goes on with the normal behaviour (routing it to it’s normal target.)

So, how are we going to use this for our port-mirroring?

Imagine that our router has the ip address 192.168.1.1, and our monitor pc has the ip address 192.168.1.254. Then the following two lines will do the trick:
This will send a copy of all packets to the monitor pc with the ip 192.168.1.254.

On the monitor, we simply start tcpdump with our desired options and we can monitor all traffic…

In my example, I’m interested in all traffic which has to do with the ip 192.168.1.3 so I call:

The “-gw” argument should be “–gw” (notice it has two hyphens, not one). The “-tee” argument should also have two hypens, like so: “–tee”.

The rest of the arguments are correct; “-A”, “-t” and “-j” should have only one hyphen.

The shell general rule of thumb is when a command line argument option has more than one letter to it, it gets two hyphens.

Convert

Converts a Debian package (.deb), Redhat (.rpm), Slackware (.tgz), or Archlinux (.pkg.tar.gz) package into a Slitaz package (.tazpkg):