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Configurando o Alcatel Touch Speed PRO para NAT (Inglês)
How to enable your Alcatel SpeedTouch Pro to become a NAT server?
Link Original: http://www.petri.co.il/adsl_and_nat.htm
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:
Internet
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212.143.143.12 (Real IP from ISP)
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Alcatel modem (Configured as a Router)
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10.0.0.138 (Bogus IP)
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PRO2-----------------------------Switching Hub------------------------------SRV1
(DC, DNS)
10.0.0.101
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10.0.0.200
(Bogus IP)
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(Bogus IP)
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10.0.0.100 (Bogus IP)
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PRO1
| 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.
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
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.
For a list of all known port numbers please see
the Well Known Port
Numbers page.
Alternative to manual configuration
Mir Design Auto Port Mapping v2.70
You can download a small program called Auto
Port Mapping. It will let you configure the modem's NAT and Firewall settings
via GUI (something us, Windows users, like).
What are the functions of the program?
- Build - Create port mappings
- Remove - Remove port mappings
- TCP/UDP choice
- List - Look at your NAT table
- Defserver - Creates a way to let your modem
send all the data to 1 pc
- Flush - Empty your NAT Table and let the
program set back the defaults.
- Firewall - Put your firewall On/Off
- From, To - Create ranges of mappings.
- IP Computer/Extern/Modem - Control
everything from one computer.
- Password, User - Login with a password
and/or an user name
- Import extern listings - Create one file
with a backup of your settings.
Download Auto Port Mapping (v2.70, 2.3mb)
http://www.mirdesign.nl
(I gave the link to the site and not the
download page because the link to the file itself might be changing soon).
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