We must type this commands:
If we want to set this date: 05-27-2007, 23:50
date --set "2007-05-27 23:50"
With this, we just set the system date. Now we will set the BIOS date.
hwclock --set --date="2007-06-27 23:50"
To see the system/BIOS hour, just type date/hwclock.
Have a nice day 
We can use the next rule to deny MSN Messenger access in our LAN. You must have Kernel 2.6.14 with the IPTables STRING module:
iptables -I FORWARD -p tcp -m string --string "VER " --from 51 --to 56 --algo bm -j REJECT
The STRING module search into the packet a text string. The “from” “to” parameters means the TCP header end and end of data.
Source: VivaLinux!
