If you want to use a sniffer to watch dhcp requests, replace rl0 with your NIC:
To read more about dhcpd read on.0 comments
A Fifo is a named pipe. It is used for IPC. It is created with the mkfifo syscall or command. Fifos reside in the filesystem and require a process to read from it while another process writes to it.
To read more about fifo, go to Hackepedia.
PS: Happy Solstice 6/2009!0 comments
I participated in the Deschall (sp) crack challenge back in 97 or so and the DES cipher was broken by a supercomputer especially built for the task. So now it's 12 years later and a lot has happened. DES was replaced by AES and AES is a lot more secure the literatures write.
But I'm left wondering why the dickens AES is a faster cipher than DES. Pretend you are brute forcing a cipher, wouldn't then a faster cipher produce more attempts per second than a slower cipher? This means a brute force would end sooner to exhaust a cryptogram. Hmm. Here are some stats of DES and AES that I cut from an "openssl speed" command on my home computer.
The 'numbers' are in 1000s of bytes per second processed. type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes des cbc 19981.67k 26454.32k 27109.93k 27133.40k 26813.16k des ede3 9693.15k 9656.40k 9351.31k 9793.71k 9824.77k blowfish cbc 35115.53k 41062.07k 39941.05k 41949.41k 41771.29k aes-128 cbc 33001.89k 51473.35k 60324.97k 66089.46k 63121.28k aes-192 cbc 30109.43k 46625.91k 51426.45k 54773.53k 56143.75k aes-256 cbc 34359.02k 42632.24k 47491.13k 47512.66k 46742.06k0 comments
Yesterday I found this movie on youtube and it touched me. It basically warned humanity once again of our ways and said in 10 years the disruption of the harmony of life will be irreversible. The movie has some great footage from all over the world, check it out.
In the northern hemisphere (Europe, North America, Asia) we'll have the Summer Solstice on the 21st of June, which means that on this day at high noon the sun is at its highest angle from the horizon. In the southern hemisphere (parts of South America, Australia, parts of Africa) the sun is at its lowest angle from the horizon (at high noon). Why this is is because of the tilt of our earth. This tilt is responsible for our seasons (at least in the northern hemisphere).0 comments
Not much is up, I wrote a linux client for natally which seems to work. I improved the openbsd client for natally a bit so that routes can be set up which unfortunately doesn't work on the linux client. I'm going to skip putting up a random hackepedia since there is so little content this week.0 comments
tr stands for translate characters and that's what it does.
To read more about tr go here.0 comments
Natally is a NAT/VPN program that works on a host that cannot do tun/tap. With iptables available, it'll make a packet socket and run with a raw socket. At the same time one can connect to it and have the session blowfish encrypted. So far there is some problems with performance that I'm working on. It's doggedly slow but I'm positive that it can be sped up.
Natally is now hosted at sourceforge. This is its homepage.
There exists a server written for Linux OpenSuse 10.3 and a client written for OpenBSD 4.5. In the future there may be other clients written for linux perhaps, but it's not a priority for me right now.
Update: Progress. I've replaced the ip and tcp checksumming routines and there now isn't any bad checksums which really were part of the slowness as the implementation had to wait for retransmissions and hope the checksums were alright. Phew am I glad that was found.0 comments
ldd as found on Linux or a BSD displays what dynamic dependencies to a dynamic program exist. Some may even tell of breakage of libraries that don't exist anymore.
To read more about ldd go here.0 comments
I clicked a little around the ripe.net site and found this chart which is very cool so I copied it.
IPv6 Relative Network Sizes
I got this information from this
As I have a /48 at home I don't think I'll ever run out of IP space even if
I gave each single cell in my body an IP address. BTW. a LAN segment in the
chart is /64 which is also called an IPv6 subnet.
On this day in
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