Linksys router and modem, no one can connect to me

Have a Linksys ADSL2MUE modem and a Linksys BEFSR11 v2 router connected to
my only pc.
Can connect and send/get email and do the usual internet things but people
who need to connect to me via VOIP/messenger/netmeeting or anything that
uses my IP address to connect to me cannot.
The modem assigns private ip addresses, no prob, that is passed on to the
router and on to the pc.
I have set the router to DMZ mode, set my pc lan to static IP, both have the
same ip address but still no one can call/connect to me.
Anyone know why that should be?
The router can be set to upnp but most of the programs used to call
me/connect to me are not upnp.

"Nero" <(E-Mail Removed)> wrote in message
news:41e78262$0$6160$(E-Mail Removed)...
> Have a Linksys ADSL2MUE modem and a Linksys BEFSR11 v2 router connected to
> my only pc.
> Can connect and send/get email and do the usual internet things but people
> who need to connect to me via VOIP/messenger/netmeeting or anything that
> uses my IP address to connect to me cannot.

Which IP address are they trying to use? You have two. The inside IP address
assigned by the router to the PC and the IP address assigned to the router
by your ISP. Anybody wising to connect to you MUST use the IP address your
ISP assigns to the router. The inside IP address will not work. Your router
I think has a status page accessible using the web based setup screens. You
can find the address assigned by your ISP to the router there.

Also for your own security your computer should NOT be on the DMZ port. It
should be behind your firewall and use port forwarding, a static inside IP
address, and open only the ports you need for the VOIP/messenger/netmeeting
applications.

One final thing. Your address assigned, by your ISP, is normally NOT a
static address. That means that it can change, and when it does people won't
be able to connect to you since the address is valid any more. to fix that
you can use a service that privides a service called Dynamic-DNS to fix
that. Check out www.dyndns.org for more info
--
Leland C. Scott
KC8LDO

Wireless Network
Mobile computing
on the go brought
to you by Micro$oft

The IP address assigned to the router is a private one that the modem
assigns because this modem only assigns private IP addresses.
There are a lot of modem router/modems that only assign private IP
addresses.
The IP address assigned to me from my ISP is a static one and always has
been regardless of what ISP I have been with. most ISP's give static IP
addresses and all the ones I have ever been with have and do.
It is not possible for people to connect to my pc using the IP address given
by my ISP if the modem only assigns a private IP address to the pc or
router.
There is NO problem with having my pc as the DMZ host as I can use software
firewall if I need and always have used a normal adsl modem(no router, no
built in firewall) until now and a software firewall.
Regarding port forwarding, I have tried that and yes, only the ports needed
but still no one can connect to my pc and the same goes for the DMZ thing.
I assumed that if I foreward the ports needed to my pc then people should be
able to connect to my pc.
This is not so and I do not know why.

"Nero" <(E-Mail Removed)> wrote in message
news:41e8dc0c$0$7960$(E-Mail Removed)...
> The IP address assigned to the router is a private one that the modem
> assigns because this modem only assigns private IP addresses.
> There are a lot of modem router/modems that only assign private IP
> addresses

Why on earth would your "modem" be issuing IP addresses? Modems normally
don't do anything more than translate data to and from the transmission
medium, your phone line or cable. The address you get should be assigned by
your ISP's DHCP server and is passed on to your PC or router, which ever is
connected behind the modem. The PC and the router both have a DHCP client
that requests the above configuration information from the DHCP server, the
one at your ISP, not the modem.

http://www.dhcp-handbook.com/dhcp_faq.html

> The IP address assigned to me from my ISP is a static one and always has
> been regardless of what ISP I have been with.

ISP's normally have a bank of addresses assigned to them for their exclusive
use, which they then assign to their customers on a dynamic basis. If you
change to another ISP I'll bet they are on another subnet than the last ISP
you had so I find it hard to believe your IP address has never changed
unless you have your IP registered with the necessary Internet authority.

http://www.iana.org/ipaddress/ip-addresses.htm

> most ISP's give static IP
> addresses and all the ones I have ever been with have and do.

Not the dial up ISP's. Most cable Internet service providers also use
dynamic IP's. They, IP addresses, may remain the same for weeks or months at
a time, but can and do change when the ISP requires it. I have Comcast and
mine has changed once or twice over the several years I've had the service.
In fact if you want a "static IP" they will charge you more money and has to
be setup special.

http://www.dslreports.com/faq/7266

> It is not possible for people to connect to my pc using the IP address
given
> by my ISP if the modem only assigns a private IP address to the pc or
> router.

Mine works just fine. I use the DDNS service at www.dyndns.org and the DDNS
update function in my router to keep the domain I selected updated with the
current IP address on their DNS server. I use the domain name to access a
couple of private servers on my home LAN all the time.

> There is NO problem with having my pc as the DMZ host as I can use
software
> firewall if I need and always have used a normal adsl modem(no router, no
> built in firewall) until now and a software firewall.

Good.

> Regarding port forwarding, I have tried that and yes, only the ports
needed
> but still no one can connect to my pc and the same goes for the DMZ thing.
> I assumed that if I foreward the ports needed to my pc then people should
be
> able to connect to my pc.

They should if they are using the right IP address and you forwared to right
ports to right inside IP addresses.

> This is not so and I do not know why.

Read the info at the URL below for Netmeeting specific help.

http://www.homenethelp.com/help/netmeeting-router.asp

--
Leland C. Scott
KC8LDO

Wireless Network
Mobile computing
on the go brought
to you by Micro$oft

There are more than one or two ethernet ADSL modems that DO assign IP
addresses to the pc(lan) or to a router.
I know of at least 20 that do just that and they all assign private IP
addresses.
LINKSYS
NETGEAR
and a bunch more do and they are not modem routers just modems.
They have a built in DHCP server that sometimes can be turned off and even
then they assign one IP address and that is a private one.
IF you were to even look at any specs of the Linksys ADSL2MUE then you would
see that is so.

You said" ISP's normally have a bank of addresses assigned to them for
their exclusive
use, which they then assign to their customers on a dynamic basis. If you
change to another ISP I'll bet they are on another subnet than the last ISP
you had so I find it hard to believe your IP address has never changed
unless you have your IP registered with the necessary Internet authority."

I said that ALL the ISP's I have ever been with have ALWAYS given out a
static IP.
I never said the IP address has never changed.
I never said anything about DIAL UP.
Why would I be using an ethernet modem(ADSL) if I was on dialup???
I said all the ISP's I have been with and most ISP's that I have checked out
ALL give out static IP addresses!.

----- Original Message -----
From: "Nero" <(E-Mail Removed)>
Newsgroups: alt.comp.networking.routers
Sent: Saturday, January 15, 2005 2:16 PM
Subject: Re: Linksys router and modem, no one can connect to me


> There are more than one or two ethernet ADSL modems that DO assign IP
> addresses to the pc(lan) or to a router.
> I know of at least 20 that do just that and they all assign private IP
> addresses.
> LINKSYS
> NETGEAR

This is the first I've heard of it. My Motorola cable modem doesn't so it's
not a universal feature.

> and a bunch more do and they are not modem routers just modems.
> They have a built in DHCP server that sometimes can be turned off and even
> then they assign one IP address and that is a private one.
> IF you were to even look at any specs of the Linksys ADSL2MUE then you
would
> see that is so.

I took a look on the Linksys web site and I didn't see anything listed
identified as a ADSL2MUE modem.

http://www.linksys.com/products/grou...rid=34&scid=29

I finally did find it on their international site, didn't know they had
products exclusively for international sales, however the manual is not
available on line. I tried the link but it doesn't work.

http://www.linksys.com/international...id=19&ipid=604

The information that is there doesn't mention anything about a DHCP server
function. I had to do a Google search and found it mentioned on some forum
on the 'net.

Anyway did you find anything useful at the link I posted for setting up Net
Meeting behind a NAT router? It looks like there are some serious issues
getting it to work without special support features built in to the router.

--------------
Leland C. Scott
KC8LDO

Wireless Network
Mobile computing
on the go brought
to you by Micro$oft

"Nero" <(E-Mail Removed)> wrote in message
news:41e971bf$0$4360$(E-Mail Removed)...
>
> I said that ALL the ISP's I have ever been with have ALWAYS given out a
> static IP.
> I never said the IP address has never changed.

OK, I miss read your post. That's what I get for typing out a reply too
fast. For some reason I thought you implied the address was the same from
one ISP to another that you had.

> I never said anything about DIAL UP.
> Why would I be using an ethernet modem(ADSL) if I was on dialup???
> I said all the ISP's I have been with and most ISP's that I have checked
out
> ALL give out static IP addresses!.

They don't charge extra for a static IP? If the ADSL modem gets it's IP
using DHCP then by definition it is a dynamic IP address since there is a
"lease time" after which the address lease has to be renewed. You didn't
mention how the modem gets it's IP address from the ISP, DHCP client, or
manually entered using an address obtained from your ISP and assigned to
you. Since I can't down load a copy of the manual for your modem I can't
tell which of those options your modem provides, or both.

--
Leland C. Scott
KC8LDO

Wireless Network
Mobile computing
on the go brought
to you by Micro$oft

"They don't charge extra for a static IP? If the ADSL modem gets it's IP
using DHCP then by definition it is a dynamic IP address since there is a
"lease time" after which the address lease has to be renewed. "
Nope, I only deal with ISP's who do not charge extra.

The modem can be set to dhcp or static mode for the isp.
As to lease time the modem default is 1 hour up to 72 hours.
It says if your ISP issues a static IP address for your account then use
default setting of obtain IP address by DCHP.
Even after the leas time is up the IP number stays the same.
If it is set to static ip then it stays the same IP address always.
It is the same IP address I have had for hours.

Yes, know all about netmeeting behind NATs and stuff.
I can forward the required ports to MY only pc but it aint gonna work as my
IP address (internet connection, lan )is still a private one.
1. the modem only assigns private IP addresses and even if the built in dhcp
server is off it still assigns a single private IP address to the pc or
router.
2. the router also assigns a private IP address to the pc and even if the
dhcp server is off the it too assigns a single private IP address to to pc.
So you have a modem that gets the ips IP address, changes it into a private
on, passes it on to the pc or router that in turn changes that to a private
IP address to give to the pc(lan/nic).
So how the heck could port forwarding to the pc(private IP address of say
192.168.0.101)ever allow anyone to connect to me?
Not a chance.