opening ports behind router and modem

Thats no doubt a good page but has the problem that only talks about routers, and besides a router i also use a modem... and the router configuration is straight forward! I think my big problem is the server pc or the modem, although all ports are open in the modem

Can you provide more information. I could perhaps be more specific.
-make and model of modem
-make and model of router
-is the PC that you refer to as an Internet provider, running ICS (Internet Connection Sharing)
-any other equipment between the Internet and the device you are trying to port forward to, such as a second router

Thanks,
--Rob

The modem(gateway) i use is a Huawei SmartAX MT882;
The router is a THomson TCW690
The Internet provider PC is running ICS, since all pc in the network also have Internet, i presume it is working fine.
There is no other equipment apart from a modem (gateway) connected via usb to a PC that is connected via wireless to a router, which by its turn has 2 other pcs connected to it in order to get the internet service from the pc connected to the modem.(i hope this is clear, although i know it seems a bit confusing)
And the program im trying to use that asks me for the open ports is a P2P called strong DC ++ v.1.0 rc10

Hi again RobWill!

After reading your e-mail, i used what your sugested feedback and made my network a lot simpler. Because the router i have is a cable router from our previous ISP and nowadays we have ADSL, i could not use it directly to connect to the phone line, so instead, i connected the router via ethernet to the modem and like this all the 3 pcs are now connected to the router (making it the network) and the router is connected via ethernet to the modem. And its working great!!! Good thing, now we dont need a pc as an Internet provider, instead we have the router.

But in the end, and altough our network is much simpler, i still have the problem of the ports, and to make it a bit worst, the link u gave me of the modem, yes, it is for the model i use, but for a router and not modem, and how am i so sure, cause the interface is a lot different from the one it shows in the print screens, it does not have so many options as a router would have...

I tryed to configure the P2P program but without success, down i show u how i set it:

damn i cannot paste print screens in here!!

anyway, i set  the stactic ip of my pc to be 192.168.1.129, the router is 192.168.1.128 and the modem 192.168.1.1 as for my gateway ip 62.15.*.*
do u think i sould set port forwarding, port triggereing and dmz in my router or just one of them?

thanks again

Well, while waiting for an answer, i continued making some change in the router config as u sugested, and guess what, it turned out to be very well!!

Thank you very much for yuor time and tips RobWill ... i now award u the points!

Nuno

>>"the link u gave me of the modem, yes, it is for the model i use, but for a router and not modem"
If the Ethernet port of the Modem is 192.168.1.1 it is likely a combined Modem & Router unit. You will either need to configure the modem and the router to port forward, or change the modem from NAT (Network Address Translation) mode to Bridge Mode (sometimes called pass-through mode). The quote I posted above suggested you may have to ask your ISP to do this for you. It seems your unit is configured with different firmware than the link I provided.

>>"anyway, i set  the stactic ip of my pc to be 192.168.1.129, the router is 192.168.1.128 and the modem 192.168.1.1 as for my gateway ip 62.15.*.*"
I am surprised this is working with this configuration. Normally the WAN and LAN sides of the router need to be on different subnets. For example:
Modem 192.168.1.1
Router WAN/Internet connection 192.168.1.128
Router LAN/local network connection 192.168.2.1
PC 192.168.2.2

>>"do u think i sould set port forwarding, port triggereing and dmz in my router or just one of them?"
If you do not have to option of re-configuring the modem as suggested above, you could try the router using the DMZ. In theory all traffic should freely pass to that zone, but I have not tried that option. If you have the option to configure port forwarding on the modem you could try port forwarding on both. This should work, although both units will be performing NAT, and that often has adverse effects on various services.

>>" it turned out to be very well!!"
That is great! I didn't see your 2nd post before replying.

>>"i now award u the points!"
Thank you CarCo,
--Rob

"I am surprised this is working with this configuration" --> i choose not to use the dhcp setting of the router, thats probably why i dont need diferrent ips for Router WAN/Internet connection and Router LAN/local network connection. Could this be true??


"and that often has adverse effects on various services" --> what effects(catastrofic?) and in what services?

>>"i choose not to use the dhcp setting of the router, thats probably why i dont need diferrent ips for Router WAN/Internet connection and Router LAN/local network connection. Could this be true??"
No I don't think the DHCP would have any effect either way.

>>"what effects(catastrofic?) and in what services?"
Usually you cannot connect through the router.
The problem is the router's job is to decide where packets are destined, i.e. to which subnet. If the LAN and the WAN are the same it doesn't know which way should it should forward the packet.
If it woks great. If not just change the LAN subnet to something else.

ok i will follow your tips, thanks a lot again!