I want to transfer Real (External) IP from DSL modem to my PC.
Right now DSL modem has NAT Enable, and my pc get the local IP.
How can assign External IP directly to my PC from this DSL modem.

I don't think you can unless you have a static IP address from your ISP. Most ISP provide dynamic IP addresses. This will defeat the whole object of having a router in the first place and it would mean that Internet connection sharing through the router would not be possible.

What is it you are trying to achieve? There are probably better ways of doing it.

Stuart

Further to StuartS post, external dynamic IP addresses usually change on a 24-hour basis.

i_Xp/VistaUser

I suspect what you want is to run a server of some kind that can be reached from the internet. Best suggestion is still a firewall between you and the internet (unless you actually want to get hacked) with port forwarding enabled.

Let's say for example you want to run a web server. You would forward port 80 to internal (LAN)IP address of the PC hosting the web site. Then all traffic hitting port 80 on your router would automatically be forwarded to the PC in question giving outside users access.

then how the cable modem transfer real (external) IP to PC. I agree that in my case, its DSL Modem but still networking protocals are same in both modem.
I have cable connection at home and my Home PC has always real IP.

How about bridging or half bridge? but i could not find any such settings in my modem.

I presume you have

Cable Internet IP Address Static

Cable Modem (this should not have NAT unless it is actually a Cable Router)

PC Static IP Address

What is the make/model of Modem ??

What is it you have, a MODEM or a router with a built in MODEM. I suspect you have the latter. A MODEM and a Router are different pieces of equipment doing different jobs. If all you have is a MODEM then yes, you will get the public IP address on your computer. If you have a router between the MODEM and your computer then you have a different setup which requires port forwarding as described by CurtR if you want to run a server.

Stuart

DSL Modem Make is: HUAWEI SmartAX MT880

its Modem with NAT service and router. So other user can access the Internet. There is a option to disable NAT.

Disabling NAT is tantamount to sending open invitation to the world to come into your network and do whatever they please (i.ie. - steal your ID and who you are and even send threatening e-mail (along with your IP & MAC addresses) to the President. You will wonder why all the Secret Services & FBI came to storm down your house within the hour).

i_Xp/VistaUser

http://www.huawei.com/products/term...

If you disable NAT other users on your network wont be able to connect to the Internet. Thats what NAT is for, to allow multiple user on the same LAN to use the same public IP address. The security aspects mentioned by XPUser are just incidental but are a good thing to have.

Stuart

i know that disabling NAT will affect my security, and other user will not able to use internet.
But i want it because want to connect it to Linksys VPN model RV042

i want it because want to connect it to Linksys VPN model RV042

Why didn't you mention this in the very beginning of your thread - our responses would have been completely different.

i_Xp/VistaUser

sorry for that

another modem i have is:
Brand:UTSTARCOM
Mode: UT-300R2U

OK...just to clarify...
1. Depending on the ISP and what brand of modems they use they may or may not NAT...
Example, Charter cable uses a modem that transfers the public IP directly to your comptuer...it does not NAT...
ATT uses the Speedstream 4100 for modems only and a 2Wire modem/router...which they like to sell if you tell them you want wireless...

2. Having a public exposed directly to your comptuer is not the best thing to do...it makes it easier for viruses, spyware etc to get on your box...easier to hack...etc...

3. If you run a public IP to your computer then you MUST have a good antivirus, a good antispyware programs and a firewall...without any of these you will get hit, maybe not today or tomorrow, but plan within a fairly short period of time you will get hit...

3. Some ISP's that supply dynamic IP addresses will change them every 24 hours or so...some will change them every few days...others may change every couple of weeks or so, but this is not very common...it all depends on what their policy is...

4. Most routers will bridge the public IP thru the router, called Bridge mode...not every router will...it is usually referred to as the DMZ...if you put your computer in the DMZ, then it IS using the public IP...Some routers will have an extra port labled DMZ...plug your computer into this port and you are using the public IP...

5. In my case, I have ATT dsl...I have 5 static IP addresses...yes I pay additional for this...ATT supplied me with a 2Wire router as it will handle all 5 IP addresses...

I bridge one IP thru the router and that public IP then goes into my 2ed router, a Linksys RV042...that router then NAT's to my home network...

I take another IP that I route thru the 2Wire to a NIC in my webserver...all traffic on port 80 comes to that webserver...I host my own website on it...I have that machine VERY hard...

In case you're interested I use Zone Alarm Pro, it is a good firewall but it has some "faults"...I use Kaspersky antivirus which I think just might be the best antivirus available...and I use Webroot Spysweeper...

So...that's my thoughts...

stevem5000
Thanks for in detail explaination.

If I use bridge mode, is it necessary to have support from broadband company? Because when I select bridge mode in my modem settings, it wipe out username and password field.so I don't know how it would login to broadband company.

One more question is, can I use DMZ and forward it to my linksys RV042 so that RV042 can get real ip?
Pls help on this.

I think...and I am not real certain here...
Some ISP do not want you to run a web server, ftp site etc on the broadband connection they provide...this will depend on who your ISP is...in my case ATT does allow it which is why they have a system to provide 5 static IP addresses...

I think part of the answer is the type of modem you are using...If your DSL modem NAT's, like the Speedstream 4100 that ATT uses in most areas, you can log into the modem and see how it is set up...This modem will hold your log in information that most DSL suppliers require as they use PPPoE...which is a username/password sytem...

So, if your DSL modem NAT's then the modem is used to establish and maintain your DSL connection...

Now...whatever IP that comes OUT of the DSL modem, it will be a private IP...like 192.168.0.xxx can go directly into your RV042...and from there to your LAN...this would be a "normal" use of a DSL modem and a router...also note, you now have 2 "NAT's"...your modem NATed from your public IP to a private and your router NATed from the incoming private IP to another private IP...In the RV042, as well as with most routers, you can choose the private IP range you want to have on your LAN...I think most people leave it as the default, 192.168.x.x...but you could choose the 172 or 10.0 range...

Now...if your DSL modem does NOT NAT...whatever the public IP address that is coming INTO the DSL modem, will be going OUT of the DSL modem and into your RV042...

NOW, your RV042 has a port on the back of it labled DMZ...at THAT port this is your PUBLIC IP address...it is NOT NATed...so If you plug a comptuer into the DMZ it will have the public IP...and computers you plug into any of the 4 ports labled LAN WILL BE NATed to a private IP range...

OK...how do we get a Public IP past a DSL modem that NAT's???
Purchase a little Netgear 4 port HUB....NOT A SWITCH...GET A HUB...about $25.00...

Why...
A hub has ALL IP traffic and sends it out to ALL ports...it is not port specific like a switch is...so this means you put a public IP into a hub and you have a public IP coming out of all 4 ports...One port goes to a router to NAT for your LAN and now you have 3 ports available to the Public IP...

Now, here is the catch to this idea...btw this works on static IP like a T1 line but it should work in dymamic IP's...

Log into your dsl modem, you should find a way to pass your public IP thru WITHOUT your dsl modem NATing...I don;t know if this feature is available in all DSL modems...

If your DSL modes does NOT nat, than it is not an issue...if your DSL modem DOES NAT then you have to figgure a way to get the public IP thru the modem...

Now, if you are going to build a webserver, ftp site etc...and you have a dynamic IP, you have to get around the DNS issue with a DNS forwarding service...cost about $35 a year or so...This service will monitor your dynamic IP and whenever it changes it will update the DNS servers so folks on the Inet can find your website...

Google for DNS forwarders...there are a bunch of them...

Hope this helps...
Regards
Steve

I set my modem as a passthrough device. It has a web based setup to allow it to be a device that converts phone to ethernet only.

Then I set the router to act as the connection manager. Connect the router wan port to the modem. -- Most soho routers have a way to put ppoe or other means to connect. Some have a smart connect feature too. Connect when needed.

Let the router offer dhcp and connect all your systems to the lan side of the router.

All assumes you can if allowed with the isp.

I read it wrong and answer it wrong too. So get off my case you peanut.