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Intercepting IP packets using Netfilter hooks

Posted 04-22-2010 at 10:26 PM by yaplej
Updated 04-22-2010 at 10:33 PM by yaplej

Netfilter hooks are very useful when you wish to intercept, and modify IP packets inside a kernel module.

One great thing about using Netfilter hooks over say dev_add_pack() is that the bad L2 frames, and bad IP packets get filtered out earlier in the network stack so you only deal with good packets.

Now the whole point of the Netfilter hook is to customize what the kernel does with the packets received by the system so here is an example hook function. It simply...
Views 2029 Comments 1 yaplej is online now

RE: Steam: Possible Linux Client in the future?

Posted 04-22-2010 at 06:53 PM by Seph64 (Seph64's Lair)
Updated 04-26-2010 at 12:04 PM by Seph64

Few months back, I posted a blog post concerning Steam and Linux.

Now with the Closed Steam for Mac beta underway, people have noticed that in the same script that launches Steam in OSX has Linux entries.

This implies Valve is porting Steam to Linux.

To make things more interesting, there's references to linux steam client files on

Posted in Linux Gaming
Views 1141 Comments 4 Seph64 is offline

Charles Chaplin's "The Great Dictator"

Posted 04-22-2010 at 06:22 PM by Web31337 (In The Middle Of Nowhere [edK's blog])

I was watching "The great dictator" again tonight.
No need to say it's simply a MASTERPIECE.
Once more it's a beautifully placed sudo wall.

If you never watched this movie, I strongly suggest you to see it. Especially for the speech in the final part. As well as I suggest you to see other movies by Charles Chaplin. They are all full of such a simple thing we are losing now. A thing that can be a way to new, better life on Earth.

What I can't...
Posted in etc, philosophy
Views 1213 Comments 1 Web31337 is offline

Troubleshoot DHCP

Posted 04-22-2010 at 01:35 PM by Mr. ameya sathe (Tantra Yantra Swatantrya)

Although your DHCP Server has been configured to assign a new IP address to a network machine;your DHCP client will retain its old IP address.
In such a case; clean out the Leases file on the DHCP Server and the DHCP Client side.

On Server side;
echo "" > /var/lib/dhcpd-*/dhcpd.leases
On Client side;
echo "" > /var/lib/dhclient/dhcp.eth0.leases
Posted in GNU/Linux
Views 1947 Comments 0 Mr. ameya sathe is offline
Rating: 2 votes, 5.00 average.

Autostart coldfusion on boot in Ubuntu

Posted 04-22-2010 at 12:10 PM by drask

My current job requires that I work with Coldfusion 9. I have it set up to run on an Ubuntu 9.10 desktop with apache2. Everything installs pretty well (there is one dependency of libstdc++5 that is no longer supported by Ubuntu and must be downloaded from another repository like as detailed in but the option to have Coldfusion startup when...
LQ Newbie
Posted in Uncategorized
Views 3111 Comments 0 drask is offline


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