Company Name

  • Network Engineering Skills

    Configured Cisco Routers (2500, 3000, 4000) using RIP, IGRP, OSPF, EIGRP and Switches (5000, 3524, 2900).
    Implementation of DHCP, DNS, FTP, TFTP.
    Implemented traffic filters using Standard and Extended access-lists, Distribute-Lists, and Route Maps.
    Routing Protocol (BGP, OSPF, EIGRP, IGRP, RIP, IS-IS), Routed Protocol (TCP/IP).
    Install and Configuration of DHCP Server, DNS Server, FTP Server, Squid, Web Server On Linux.

  • Computer Programming Skills

    Office Package: Microsoft Word, Microsoft Excel, Microsoft Access, Microsoft PowerPoint, Microsoft Outlook Express.
    Programming Language:Pascal, C, C++, Java, Java Swing, PHP, Dot Net.
    Operating Systems: Windows9X, Windows Server200X, Windows ME, Windows XP, Windows Vista, Windows 7, Linux, MS DOS.
    HTML Editing Tools: Macromedia Dreamweaver, Microsoft FrontPage, Adobe GoLive.
    Graphics Tools: Macromedia Flash, Macromedia Fireworks, Adobe Photoshop, Adobe PageMaker, Adobe Illustrator,SwishMX.

  • Technical Support Specialist

    Install Network Interface Cards NIC s . Setup bindings, IP addresses, WINS, and DNS configurations. Operate, and maintain Local Area Network LAN connectivity using TCP/IP protocol.
    Identify, troubleshoot, and analyze computer related issues. Determine appropriate course of action, and conduct repairs, modifications, and upgrade internal components and peripherals as needed.
    Plan layout of workstation locations and LAN cabling. Coordinate teardown, move, and install of office partitions, desks, and equipment. Install PC workstations, LAN cabling and setup network connectivity.
    Maintained excellent working relationships with customers, field service, sales and marketing people.



Enable Alcatel SpeedTouch Pro with Static Port Mapping

In the previous tip I’ve explained how to convert your Alcatel SpeedTouch Home ADSL modem to the PRO version. After you’ve done that you might want to begin some serious network configuration.

To be able to access your LAN from outside you’ll have to configure NAT (Network Address Translation) on your modem. I won’t go into explaining what NAT is and what it’s good for. That will come later. I’ll assume you know what you want, and this tip will only tell you how to do it, not why.

Let’s say you have the following LAN configuration:

enablespeedtouchwithstaticport

Computer OS Software IPs and Ports
PRO1 Windows XP Pro Remote Desktop 10.0.0.100:3389 (TCP)
SRV1 Windows 2000 SRV Exchange 2000 10.0.0.200:25 (TCP)
10.0.0.200:110 (TCP)
10.0.0.200:80 (TCP)
Terminal Services (TSWEB) 10.0.0.200:80 (TCP)
IIS 10.0.0.200:80 (TCP)
10.0.0.200:21 (TCP)

Let’s say you need to make all of the above services and applications available from the Internet. Reasons for doing so might be:

  • Receive SMTP mail destined for your domain (if you have one and if you have an MX record for it)
  • Connect to your Exchange Server via OWA
  • Send to and receive mail from your Exchange Server via Outlook Express
  • Have a small web page for your customers
  • Have a small FTP site for your use
  • Control your Server and XP computers from Terminal Services and RDP clients

There may be other reasons and other applications you’d want to use but we’ll stick to those for the purpose of this article.

To make sure these applications can accept incoming connections you’ll have to map a port for them on your ADSL modem.

Lamer Note: The above settings are only examples of what your network should look like. You’re settings may be different. Use your brains, friends and Google to find out what ports YOUR applications need, and use the following logic to apply the settings.

Step one – Connect to the modem

At PRO1 (or SRV1) open a Telnet session to the modem:

  • Telnet to your modem by using this command:
telnet 10.0.0.138

Log in as any user and the modem will show a string like ‘SpeedTouch (00-00-00-00-00-00)’ before asking the password. That’s the MAC address of the modem.

Enter the password that you obtained through the script found here: Upgrade from Home to Pro (the one I told you to write down… you did write it down, didn’t you?).

Go into the NAT command by typing

nat
Enter the password 

Go into the NAT command by typing

nat


the help command will bring out a list of known commands. Try list to see how your modem is configured.

Step two - Configure NAT settings

As we're already in the NAT command prompt we can now enter our configuration parameters and save them.
Begin your configuration with the create command:

=>nat
[nat]=>create
protocol = tcp
inside_addr = 10.0.0.100
[inside_port] = 3389
outside_addr = 0
[outside_port] = 3389
[nat]=>save
[nat]=>


This set of commands will tell the modem that if an incoming connection is being attempted from the Internet to the true IP address (the one we got from the ISP) at TCP port 3389 - it should map it to the bogus IP address of 10.0.0.100 at TCP port 3389 - that's where your RDP connection awaits the call.
Basically, you could type the command in one string:
:nat create protocol=tcp inside_addr=10.0.0.100:3389 outside_addr=0.0.0.0:3389
and get the same result.
Go on with the rest of the information in the table. Save your settings by using the save command. View the settings by using the list command.
:nat create protocol=tcp inside_addr=10.0.0.200:110 outside_addr=0.0.0.0:110
:nat create protocol=tcp inside_addr=10.0.0.200:25 outside_addr=0.0.0.0:25
:nat create protocol=tcp inside_addr=10.0.0.200:80 outside_addr=0.0.0.0:80
:nat create protocol=tcp inside_addr=10.0.0.200:21 outside_addr=0.0.0.0:21
That's it. Make sure your settings are correct. If not, you can delete them by using the delete command:
:nat delete protocol=tcp inside_addr=10.0.0.100:3389 outside_addr=0.0.0.0:3389
and so on.
Or if you want, do the delete command as a step-by-step sequence just like we did at the beginning.
Don't forget to type save to save all your settings!
Good luck.

This entry was posted in DSL Technology.

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