how to allow 2nd house computer via router past firewall?

[Guest]

[marianne2641]

Please help me.   I do not understand this program at all.  I need to allow a second computer in my house to access the internet via a router associated with the main computer ( mine).  How do I do it?  All the terminology confuses me, and I do not understand what to allow and what not to allow.  I tried putting in her IP address, which is the same as mine, but that does not help.

[3xist]

Do you need help with both the Router And Firewall? Are you talking about a Software Firewall? If you are, What Firewall are you using?

[Ronny]

Hello Marianne,

First we need to know a few extras from you "network".

- Can you tell us what versions of Windows you are running on both computers ?
- What's the make/model of the modem/router you are using ?
- How are the 2 pc's connected over cable or wireless ?

If you have a Local network with a Router then you need at least 3 unique ip addresses to make things work, 1 for the router, 1 for the first pc and an other one for the other pc.

A Router is something like a traffic agent, it knows the road to google, msn etc. Basicaly if the traffic is not for your local network it needs the router to get to the rest of the internet.

A Firewall is something that can control what type of traffic is allowed in our out the firewall. Like email is a different protocol (like a language) then surfing the net and you could configure the firewall to block email but allow surfing.

Hope this helps a bit.

[abcgarnet]

Please help me.   I do not understand this program at all.  I need to allow a second computer in my house to access the internet via a router associated with the main computer ( mine).  How do I do it?  All the terminology confuses me, and I do not understand what to allow and what not to allow.  I tried putting in her IP address, which is the same as mine, but that does not help.
[Set the 1st computer IP configuration to 192.168.0.2 and the 2nd computer to 192.168.0.3]

[abcgarnet]

Please help me.   I do not understand this program at all.  I need to allow a second computer in my house to access the internet via a router associated with the main computer ( mine).  How do I do it?  All the terminology confuses me, and I do not understand what to allow and what not to allow.  I tried putting in her IP address, which is the same as mine, but that does not help.

Try to set the 1st computer ip configuration to 192.168.0.2 and the 2nd computer to 192.168.0.3

[JerryWMac]

I too have similar, it works but do not like the way it works.
    Main Comp. #1 set as server with USB access to cable modem and Ethernet access to dumb router.
    wifes comp. #2 set to access mine through router.
    sons comp.  #3 set also to access mine through router

All comps are 2.8 GHz or greater, with 2 GB's or greater DDR, and at least 80+ GB's HDD
All are running windows xp Pro sp3, and updated.
running comodo antivirus/firewall on all, and avg on sons. but all running comodo firewall

at least 2-3 times a day, I have no idea what happens, but son or wife loses connection. and cant access the internet.
Then after I reboot mine, it 'finds' a new network, which I have to rename, and will  not accept old name.

New ISP, with a older cable modem, I thought it was the modem, but the window that is popping up, says Comodo and has 'found' a new lan connection.
suggestions, is starting to bug me.
The modem is an Ambit (now called Ubee) model U10C018. using only the USB port on this modem, as that leaves me free to connect to the LinksKey home lan router.

[EricJH]

Why is your main computer not connected to the router? Having all three computers connected by the router "makes more sense" .... whatever that may be ..

[panic]

As Eric suggested, a better way to set up would be to connect the modem to the router by ethernet and then connect the PCs to the router.

[JerryWMac]

I guess was not clear....
{Quote}
I too have similar, it works but do not like the way it works.
    Main Comp. #1 set as server with USB access to cable modem and Ethernet access to dumb router.
    wifes comp. #2 set to access mine through router.
    sons comp.  #3 set also to access mine through router{/end Quote}
  as you can see, the USb port is connected to the modem, as the modem has only 2 exit ports, USB and ethernet, and only one can of these connections can be used at a time.  If I use the ethernet connection, then other comps on lan have NO access at all. The main computer though has multiple USB ports, but only a single ethernet port, the single ethernet port as shown above is connected to the dumb router.
in this way the other computers can connect to the internet(providing the firewall lets them) by using ethernet connection to router, then usb connection shared to modem.

I used this same system quite faithfully about 10-15 years back.  before they came up with slightly more modern modems and combined router modems.
Not all routers have or give direct access tothe internet, some are considered 'dumb' routers, becuase they only permit access of one computer to another computer within the same lan.
and provide access to the Internet only if one of the computers has access to the internet and the owner of that com. permits access by all on internal lan.

Apologise that did not explain prior to.  did not think had to explain simple lan setups ?
as it is I still am having problems with comodo Firewall blocking and  on going permission approved connectio to the internet by secondary computers on the internal lan.  It resets the lan name at random.

[JerryWMac]

As Eric suggested, a better way to set up would be to connect the modem to the router by ethernet and then connect the PCs to the router.

Yep that also is great, except for some strange reason when I tried it that way, the modem picked one connection/computer and that had full access to the internet, NONE of the others had access.
I do not know why, the ISP had no idea why, they asked me if had the wireless router that they were recently shipping for connecting multiple comps at same time,  No the technician only brought 1 modem, an old one used abused but working. at time it only worked with Ethernet, till I downloaded new software upgrades for it, then my windows Pro sp3 'found' the hardware after setup had run and then rebooted.

Later maybe next month for sure going to try to 'buy' a new cable modem, that comes with cd for install. see if that makes a difference, as this one may have slight problems, as appears it outdates my current veersion of Windows by long shot.  Notice this modem is at LEAST 1 year old if not more, provided by ISP. with no CD's instruction manuals nothing.  The company that made it changed it's name over a year ago.
But the problem remains. the firewall is randomly changing the lan connections.. and that loses my wife and sons connection till I rename the connection to work.
 

[EricJH]

What do you mean with dumb router? Dumb router sounds like a switch or hub to me. Does the router have a web interface? What is the name and version number of the router?

To successfully use a router with cable systems in my country, the Netherlands, it is mandatory to clone the MAC address of the network adapter of the computer, that first connected to the modem, into the router. Does it work like that with your cable provider as well?

When you disable the firewalls on your computers does that influence the problem or does it stay the same?

[JerryWMac]

Dumb router, my term.
it does no funtion except link cmputers by a router, provides NO access to the internet, only computers connected directly to it.
LinksKey 8 port 10/100 Switch

but seeing as how this forum has been so helpful, I am tired of waiting for an answer.. am de installing Comodo, and reinstalling something, anything else.
As it appears my whole problem is NOT with the hardware, but with the software, comodo in particular.

It continues to lose connections between in house lan connections and magically FIND other connecitons but then has to reconfigure same.
10 years ago with same type of setup, the software I used did not do this, they stayed connected (sure turned on /off on daily basis, but up to a year with no lan connection problems.
This for me is a very poor service ..

Up above you suggestion that I had no ethernet connection, but IF you had read it, then you would have seen that yes I did have the main computer connected..
Simple things, to misdirect for the question.
In that this has been totally no help at all

[panic]

I see said the blind man.

Some of the confusion in the responses arose from the use of the term "router".

FYI - a switch is not a dumb router. Switches and routers are two separate classes of equipment (even though most routers have a built in switch) with two distinct functions.

A switch is an intelligent hub, which forwards packets from a source to a specific destination without sending it to all conmnected destinations (the way a hub does).

A router can forward packets from one network (with one set of IP addresses) to another network (with a different set of IP addresses).

So your setup consists of three PCs connected by ethernet through a switch, with one of the PCs, connected to a USB cable modem, acting as an ICS (Internet Connection Sharing) gateway for the other two PCs.

If this is the case, then the PC that acts as the gateway (and is running CIS) would need to have several global rules created to allow the other PCs to connect to it. These rules can be created by running the stealth wizard and telling it that this PC acts as a gateway for other PCs.

You would then need to also create rules to allow DHCP (auto assignment of IP addresses) to take place. It's also a good idea to create rules covering the 169.254.X.X subnet as well, as this is used if there any difficulties having an address auto assigned.

We can step you through these steps if you still want to use CIS.

Cheers,
Ewen :-)

[Jose_Lisbon]

If I use the ethernet connection, then other comps on lan have NO access at all

Do you mean using the ethernet on the router? Thus creating a modem/router. Does like that other comps have no acess? Why?

Because if you mean using the ethernet on your PC...then of course other comps couldn't acess.

Would it be to dificult and/or expensive to ask your ISP for a proper modem/router an thus have the benefit of a hardware FW and a single network?

[panic]

Do you mean using the ethernet on the router? Thus creating a modem/router. Does like that other comps have no acess? Why?

Because if you mean using the ethernet on your PC...then of course other comps couldn't acess.

Would it be to dificult and/or expensive to ask your ISP for a proper modem/router an thus have the benefit of a hardware FW and a single network?

Hey Jose,

Please read all the OP's posts. There has been some confusion over his use of the term "dumb router". Apparently, the OP has a switch which is used to connect the PCs on his home LAN, one of which is connected to the internet by USB to a cable modem. This PC acts as an ICS gateway for the other PCs.

There is no actual router in this scenario.

Cheers,
Ewen :-)

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