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Anonymous Posted on Feb 16, 2006

How do I find the Public (WAN) IP Address on my router?

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  • Posted on Feb 16, 2006
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Step 1 Open a web browser (Internet Explorer for example) and type in the LAN IP Address of the router (default:192.168.0.1). The username is admin (all lowercase) and the password is blank (nothing). Step 2 Click the Status tab and click the Device Info button. Step 3 The Public IP address will be listed under the WAN heading in the IP Address field.

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Router ar 410, wan port is eth0 with statick ip, public, and switch port 1 is on vlan2 with pirvate ip address 192.168.18.253. how tu add default route for acces to internet eth0 is connected on shdsl...

Does the DSL router have a model number? Also for the public address, can you give me the first couple of digits. I just want to make sure it is truly a public IP address and not a class A or B private address because only an ISP can hand out public addresses.
If the IP address on eth0 is indeed private, I am guessing you have to get into the DSL router and set a static route to point to let it know about both of the the ar410 networks on each interface. Keep in mind it might not understand VLSM so when you static route in the DSL to the 192 network you will only need to specify it as 192.168.18.0 as class C default mask is 24.
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Set your netgear router to DHCP or obtain an IP address automatically on the WAN, or public (internet) side
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Can't connect to my router

Try this;

Just set it again via wired connection or LAN. Access it via Network Connections, and under Network connection look for for your LAN. Right click Local area connection,click properties, then highlight Internet Protocol(TCP/IP), click properties. Under General choose "Use the following IP Address ".

Input on IP address you should have router tutorial. Commonly its default is 192.168.1.1
Subnest Mask 255.255.255.0
Default gateway 192.168.1.2

Under it choose " Use the following DNS server address"
Input DNS address DNS of your ISP

Click ok

goto Inernet browser tab input 192.168.1.1 this will direct you to router configuration setting input its user and pass. If unchanged see tutorial of your router or at the bottom of the router. Then you can change setting of your router.

Hope it helps.
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How to enable WAN IP in a DI-604 Router for 3 computers

"I wanna make the 2nd pc a server but it isn't accessible through the WAN ip. "

Well that explains everything. If you want to get to 192.168.0.102 from the internet, you need to tell the router where to send packets. You do this by going to the ADVANCED section and configuring Virtual Servers. For example: If you are setting up the computer at 102 as a ftp server, ftp uses port 21. The name would be FTP, private IP would be 192.168.0.102, Protocol is TCP, and the Private and Public ports would normally both be 21. Don't forget to Enable the rule.

What this does is tell the router that when ever a request comes in on port 21, it should forward it to 192.168.0.102. To access the external side of the router you need to go to 70.55.84.233 (according to the image you posted)
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Paradyne 6218-12-200 won't connect all computers

A public IP address is usually assigned to the WAN port (outside/public side), which is how your router is conected to your Internet provider service.

A private IP is always assigned to the private network side (LAN = Inside). Unless you are hard coding your IP addressing on each of your devices, you will need to have DHCP enabled in your router with enough user IPs for your devices (more than 1).
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RCA Modem DCM315R

Just a bit of explanation. E0 interface is for inside network (LAN interface). E1 is for outside (ISP or WAN physical interface). Dialer1 is for PPPoE (the "actual"/logical WAN interface). The 1.0.0.13 is ISP provided static IP address for the use of the server. This configuration example is for running FTP server, which uses the standard TCP port 20 and 21.

The LAN uses 10.10.10.0 network with 255.255.255.0 subnet for both servers and workstations. All servers within the LAN use static IP address. The router is configured as DHCP server to give out IP info (IP addresses, subnet mask, DNS) to workstations that are configured as DHCP client.

Basically I suggest that you deploy NAT (Network Address Translation) and PAT (Port Address Translation) to setup your own servers behind Cisco router. The NAT is used to translate the ISP's given static IP address to your local IP address. The PAT is used to translate TCP ports (the port 20 and 21) between the two IP addresses.

When using NAT/PAT, keep in mind that the Internet-accessible servers are seen from the Internet as their NAT/PAT-ed IP address (the Public IP address) and not the local IP address (not the Private IP address). This understanding is very important when you or someone need to test connectivity to the server and/or when you need to create filter (access list or ACL for short) to allow only certain incoming traffic from the Internet and block others.

Side Note:
For more info on NAT/PAT concept, check out the following FAQ
»Cisco Forum FAQ »NAT and PAT; Introduction and Implementations

Instruments used in this illustration are pretty much standard for running your own servers. Please note that IP addresses, username, and password are changed. However, you could always modify the configuration to suit your situation.

This sample configuration assumes that you have a block of IP from ISP. There is a dedicated Public IP address for the router WAN interface (the Dialer1 interface) and another dedicated Public IP address for the server PAT IP address. If you only have a single Public IP address for both router WAN interface and server PAT IP address, there are several ways to configure the router.

One way is to use the same command as shown in sample configuration.

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  1. ip nat source static tcp 10.10.10.2 21 1.1.1.14 21 extendable
ip nat source static tcp 10.10.10.2 21 1.1.1.14 21 extendable
This one configuration way is suitable when you have static IP address from your ISP and you know exactly what the IP address is. In this case you have the 1.1.1.14 single static IP address for both the WAN interface and Public server IP address.

When you are unsure which IP address you receive from the ISP, or when your Public IP address keep changing; then another way to configure the static PAT is following

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  1. ip nat source static tcp 10.10.10.2 21 interface Dialer1 21 extendable
ip nat source static tcp 10.10.10.2 21 interface Dialer1 21 extendable
With situation of dynamic IP address, at some point you still need to know the exact Public IP address you receive from your ISP for server connection testing and production time. To find out, you can issue show ip interface brief command on the router. You will then see the associated WAN interface Public IP address.
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Yes, however we recommend using the following procedure is the only way you can do so without a block of IP addresses. The example below is for instances where you have multiple public IP addresses that are not in block form. For our example the ISP has given us 3 Public IP addresses. One goes to the FTP server, Web Server, and the Router. You can setup the router for whomever your ISP is. If you have a dynamic IP address and you're unsure on the setup, please see the article on setting up the router with a static IP address. If you have a static IP address please our article on setting up static IP addresses with the router, and it will describe how to setup the router with a static IP address. Once the router is setup, it will provide the 3 PC's (In our example) with internet access. The remaining two public IP addresses should be assigned to the WEB Server and the FTP server. Note - The Web and FTP servers will not be on the Local Area Network of PC-1, PC-2, and PC.
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