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Securing Network With Mac Address

DK — Wed, 18 Feb 2009 17:00:15 +0000

Rules that apply in the network to users sometimes become a threat for us as the network administrator. How not, when we have determined that the device or PC using the IP Address that we have set such a good idea even in use by other parties who are not responsible.

For instance there is a director or manager in the place where we have the bandwidth quota is greater than an unprincipled support of IT. Support easily by using the IP Address of the Director to have the bandwidth capacity. Now he is problemnya.

How is the solution, a solution that is easy to register the Mac Address of the PC / device to the Director of the router and we make sure that we only receive the router from the Mac Address.

First we check first before the Mac Address of the Director. Can directly or through visiting Mikrotik Router through us. Use the following command:

[root@NOC] > /ip arp print
Flags: X – disabled, I – invalid, H – DHCP, D – dynamic
#   ADDRESS         MAC-ADDRESS       INTERFACE
0   192.168.23.16   00:1D:60:6A:C2:E1 LAN
1   192.168.23.29   00:1D:60:6A:B2:74 LAN
2   20.20.20.9      00:13:10:0A:10:BA LAN
3   172.19.55.26    00:13:10:02:C8:5B LAN
4   172.19.55.30    00:1E:58:F6:32:D2 LAN
5   172.19.55.38    00:21:91:00:32:B1 LAN
6   172.19.55.42    00:0C:42:0D:1E:E9 LAN

From there we can see that the IP owned by the Director and Mac Addressnya. Then we see there, add:

[root@NOC] ip arp> set 1 address=192.168.23.29 mac-address=00:1D:60:6A:B2:74 interface=LAN

After that we set to the interface of the router we are connected directly to the LAN only accept me or Reply data from the Mac Address that we created earlier on. How:

[root@NOC] ip arp>/interface ethernet set LAN arp=reply-only

From here on, please try and use the PC / device Support the naughty line.

Making System Application Conduct Electrics Peripheral Use Digital Communications Of Parallel Port And Delphi.

DK — Sun, 13 May 2007 10:48:50 +0000

Parallel port communications a lot of used in PC interface but usage of port public is to communicate with printer, modem, keyboard and displayed. Though communications function of parallel port can be used for controlling equipments of household electrics like lamp, fan and others. Hence important port parallel so central in the case of digital data communications, more than anything else at the moment, port parallel can be told becoming not good because its function have often replaced by USB ( Serial Universal Bus). This paper will explain software and hardware using function of parallel port, its application Control system peripheral of electrics able to be used in the case operation peripheral house electrics or building. Software has been designed under Windows environment (32 bit) using Delphi version 7.0 from Borland International, Inc Software.
There are two kinds of two that is software and hardware. Software control system as controller extension between computer port and network relay, while to its it consist of network controlling interfaced to relay every apparatus/peripheral of electrics which later controlled by software which installation on computer. Testing data information and transmission with varying transmission speed have been done in this experiment, while examination of hardware done at truth evocation of poured into electrics current peripheral conducted software on computer.

For download this application, an see article and other component delphi click this link: Project Delphi With Parallel Port

Author & Coding
Dede Kurniadi

Articles Parallel port

DK — Sat, 12 May 2007 14:16:38 +0000

Less commonly referred to as the Centronics interface or Centronics connector after the company that originally designed it, the port was later developed by Epson. The parallel port is found on the back of IBM compatible computers and is a 25-pin (type DB-25) computer interface commonly used to connect printers to the computer; below is an example of the DB25 interface.

The interface found on the back of parallel interfaces is commonly a 36-pin male / female connector that is held in place with levers on each side of the cable.

Additional information and help with the parallel / LPT port can be found on our parallel port help page.

The Apple Macintosh computers use SCSI as its interface, which is parallel, but a lot more flexible when compared to the parallel port used with IBM compatible computers.

Also see: Connection, LPT, Parallel, Printer definitions, Serial port

Source : ComputerHope.Com