Question about RCA Thomson Digital Cable Modem (DCM305R)

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My RCA router needs to be port fowarded

I have an RCA router. there is a few games i play that say: NAT Network Connection Problem. so i went to its site and it sayd i had to portforward my router because there was a port blocking the NAT network connection. the site also says for some reason the game doesnt play with linksys but i dont know if that has anything to do with it. So all im asking is how to portforward my RCA router...

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Re: my RCA router needs to be port fowarded

Go to this page: Find your router on this list and it will give you a detailed description on how to port forward.

Posted on Aug 23, 2007

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How to connect a rca thomson router to wifi

You are trying to connect to a modem, not a router, the router, a wi-fi version, is what you are connecting to your network.
First, power off all equipment, computer and modem, use the network cable you have connected to your computer from this modem and disconnect from the computer, connect it to the differently colored port on one end of the Belkin, the others have numbers, connect a network cable from one of the numbered ports to the computer.
Now power on the RCA modem, wait until lights are steady, then turn on the new Belkin router, wait until lights are active, just a few moments, then power on your computer, you should now have internet access and be able to locate the manual from the Belkin's website to further your setting up a passphrase or setting up some security on your wi-fi.

Jun 14, 2014 | Thomson Rca / Digital Broadband Modem...

1 Answer

I am gaming and my game keeps giving a message that says ( my router's NAT Type is STRICT) but I'm hooked up directly to my motorola surboard. how can i fix this please.

Did you look up NAT on the web??? in all cases in gaming terms NAT has noting to do with routers it's a term used for filtering opponents (other users) in a game... in routers the term NAT stands for Network Adress Translation) nothing to do with gaming, fire walls or ports, only ROUTING, WELCOME TO THE NETWORK/GAMING WORLD... look in to the game settings instead of the router's


Jul 30, 2011 | Arris SURFboard® SB5101 Cable Modem

1 Answer

How do you achieve a nat type 1 or a nat type 2 connection to a playstation3?


You will have to open the following ports in your modem /router
Make sure the firewall is disabled in the Modem /Router
Make sure that UPnP is Enabled

Playstation Network Required Ports

TCP 80
TCP 443
TCP 5223
UDP 3478
UDP 3479
UDP 3658

Playstation Online Game Ports

Call of Duty 3:

UDP 3074
TCP 3074


UDP 3659
UDP 3660

You can use to test if the ports are open.

Jan 04, 2011 | Siemens SpeedStream Modem (4100) (SS4100)

2 Answers

I need to connect my play station 3 to the internet wirelessly

Your RCA DCM425 modem is just that, a modem. you need to buy and plug a wireless router into it. That will broadcast your internet connection for your playstation to find.


2 Answers

My NAT setting is strict. ive tried everything i know to change it but cant. i have a silver motorola modem wit a black and blue linksys router but i cant figure out how to change the Nat setting. Im...

Microsoft has a support page to help you with your NAT settings. The prescribed solution is to "open" the following ports on your router:
  • UDP 88
  • UDP 3074
  • TCP 3074

1- Using your Browser, Log on to your router (by normally typing in the192.168.1.1 address check your router's manual to see what the defaultgateway address)

2- If you already know how to log in to your router, then skip thisstep. If you have never logged on to your router then more than likelyyou still have the default initial log in credentials (username: admin- Password:1234 ..... Again check your router's manual to be sure). Theminute you log in you need to change that password immediately, mostnetwork-savvy folks know that 90% of the people out there never resettheir router's initial password and they can log on and make anychanges to suit their needs, including locking you out of your ownrouter.

3- Once you are logged in click on sercruity, scroll tot he bottom and make sure "Filter Internet NAT Redirection" is set to "disabled" ,

4. now click on advanced routing
make sure
Nat is enabled.

5. now click on applications and gaming.

you should be able to find two advance settings (One if for NAT - and the other is for Upnp)

4- Let's start with the NAT setting changes, and we will edit theUpnp settings at the end.

6- You will need to find out what the static/dynamic (preferablyStatic) IP address you xbox360 has. To do so, go to the Dashboard, goto the Console settings page, and click on the network settings to seethe IP address (should be something like 192.168.1.x). You will needthat IP address to enter into your NAT table on your router.

7- Once you got your XBOX's IP address enter it in the NAT PortForwarding table (From - To - IP address:)

8 - In the first line enter 88 under both "From" and To" fields, thenenter the IP address of the xbox in the field where you are to enter anIP address. (this is for UDP port)

9 - Repeat the same step for port TCP (which is 3074)

10- If these changes do not help open your NAT settings, then try theUpnp option. Click on your Upnp Advances settings enter the same information with the ip, and make sure UDP are enabled and checked for. use the port #s for your info as well in the chart. you can name them what ever u want under the application column.
  • UDP 88
  • UDP 3074
thend o the same for

TCP 3074
just make sure the tcp is checked and not udp.

if that doesnt work we can do a full reset on your router.

Reset for most routers with a reset button on the rear panel
Write down configuration information such as IP addresses, securitykeys, opened ports and services, etc., that you modified. (The defaultusername is admin and the password is either password or 1234. Try these before resetting the router.)
  1. Press the reset button on the back until the test light blinks.This takes about 10 seconds. (To avoid accidental resets, the smallbutton is recessed. Use a pen or paperclip to access it.)
  2. Release the button.
  3. Wait for the router to reboot.
  4. Log in with the default password.If the router configuration was not cleared, try these additional steps AFTER the router has finished rebooting.
  5. Unplug the router's power.
  6. Press and hold the reset button. While the button is held down, reconnect router's power.
  7. Continue to hold the reset button for 20 seconds after reconnecting the power.
  8. Wait for the router to reboot.
  9. Log in with the default password.
please rate me, and mark this fixya if it has helped.

Nov 28, 2009 | Motorola Modems

2 Answers

Trouble connecting netgear wireless router to rca modem DCM425

First try connection the Yellow ethernet cable from the rca modem to your computer's network connection. If you get a connection this way, then your modem will work with a ethernet cable. If not, then call Comcast for help. The modem ethernet out to computer port must be connected to the wan line of the router. Then you can connect an ethernet cable from your computer network connection to one of the 4 ports of the router. For wireless connections you must set up the router and wireless adaptor with the same settings to connect. Follow the routers directions.
Good Luck


1 Answer

My xbox

If your xbox is connected straight to your modem or router, the game console will detect the connection automatically; however, if your xbox can not connect still, I suggest you check on the settings of the modem. Try enabling NAT on your modem.

Changes on the modem can be done by pulling up its interface. The interface of the modem can be pulled up by typing the default gateway of the modem in the address bar of a browser.
** ** DEFAULT GATEWAY can be obtained by typing ipconfig in the command prompt.

Once you are able to pull up the interface, play around on the buttons and look for the NAT?GAMING option and enable it.

GOOD LUCK and enjoy troubleshooting!


5 Answers

How do i change my NAT setting from strict to open

The NAT usually has to do with a device connected to a router. You cannot change the NAT on a modem, only a router. To change it to open, you have to simple forward ports.

May 09, 2008 | Modems

1 Answer

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 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 network with 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 21 21 extendable
ip nat source static tcp 21 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 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 21 interface Dialer1 21 extendable
ip nat source static tcp 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.

Feb 25, 2008 | RCA Cable Modem DCM315R (11603540)

2 Answers

Need to change NAT settings for xbox live

Hey, I've had the same problem too with my NAT but it said medium instead of restricted. I havent tried this yet cause I'm at work but you restart your router by just inpluggin the power cord and waiting 20 seconds than trying again.

Hope that works!

Nov 01, 2007 | Siemens SpeedStream Modem (4100) (SS4100)

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