Setting up an anonymous FTP server under Solaris, when using the built-in in.ftpd daemon, is a little bit different than setting it up under GNU/Linux using WUftpd.
First, let’s create the ftp user and ftp group. Then, let’s create the home directory for the ftp user:

mkdir -p /export/home/ftp
groupadd -g 99 ftp
useradd -u 99 -g 99 -s [...]

NOTE: This post is a based on Mac OS X, Bluetooth and Nokia UMTS phones that I wrote some days ago, but adapted to Motorola 3G phones.
This brief post explains how to pair Mac OS X with a Motorola 3G/UMTS phone in order to access the Internet via a data packet connection. In my case, [...]

This brief post explains how to pair Mac OS X with a Nokia 3G/UMTS phone in order to access the Internet via a data packet connection. In my case, I’m using a Nokia 6234 phone but any other Nokia phone should work.
Before you start, please make sure that your phone is properly configured and that [...]

Xen networking is powerful enough to allow for extreme customization. Although the default networking configuration is usually more than enough for simple scenarios, it can fall short when trying to support multiple guests standing on different VLANs.
In this short article, I describe the steps needed to configure Xen to attach itself to multiple VLANs using [...]

The Cisco Linksys WRT54G/GS/GL is made up of a six-port configurable switch, a standard Ethernet controller (usually a Broadcom controller named eth0) and a Wireless controller (usually a Broadcom controller named eth1).
The following diagram tries to illustrate the different components that made up the Cisco Linksys and how are they interconnected:

[...]

You can use the following Cisco IOS commands to reset the Cisco configuration back to factory defaults:
write erase
This will clear the startup-config and fill it up with factory defaults.
delete flash:vlan.dat
Most Cisco IOS switches keep VLAN configuration data — like VTP protocol data, active VLANs, and so on — in flash memory, in a file called [...]

Using TUN/TAP networking with QEMU grant guest machines access to some or all networks reachable by the host machine. This also allows accessing services offered by guests machines from any other host.
To be able to use TUN/TAP network, instead of directly configuring the physical Ethernet network device — my Realtek 8169 Gigabit Ethernet, which in [...]

Setting up the CA
Follow the steps on setting up a Certificate Authority (CA) using OpenSSL.
Issuing the client certificate and private key
Once the CA has been configured, we will generate a private key and an unsigned public key digital certificate.
# openssl req -new -days 365 -newkey rsa:1024 \
-keyout sslkey.pem -out unsigned.pem
The unsigned public key digital certificate, [...]

When running a Linux kernel 2.6, it’s very difficult to tell network interfaces apart when they use the same driver or chipset. This can also be confusing even on systems with multiple network interfaces using different chipsets or drivers. Which one is eth0? Which one is eth1? What’s even worse is that it seems udev [...]

I use the following script for my Linksys WRT54GS Wireless router running OpenWRT White Russian -RC4 to setup a QoS firewall that uses Hierarchical Token Bucket (HTB) and Stochastic Fair Queueing (SFQ) to classify the traffic in three cathegories:

Interactive, high priority traffic:
This class is used for DNS traffic and SSH traffic.
Interactive, normal priority traffic:
This class [...]