How to use Remote Assistant behind a router?

[SF Javier]

Hi, I try to help my brother with his computer at his home and do it from
mine using some kind of remote access. Since both have Windows XP I
suggested him to use remote assistant and we tried to connect each other
without success. We only receive the message that says the Remote Connection
could not be established because the remote host name could not be resolved.

Due to our dsl provider configuration both of us are behind a router, so
both of us have private ip address.

Do I need to configure something to make the remote assistant work? I think
this private ip issue is the cause of the problem.

Thanks.

Javier

 

[Robert L [MS-MVP]]

The reason you receive this message is that your brother sent the invitation with a private IP.what you need to do is changing the IP address to the public IP. This link may help,

remote desktop How to fix the error "Remote Assistance connection could not be established because the remote host name could not be resolved"? ....
www.chicagotech.net/rdesktop.htm


Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Hi, I try to help my brother with his computer at his home and do it from
mine using some kind of remote access. Since both have Windows XP I
suggested him to use remote assistant and we tried to connect each other
without success. We only receive the message that says the Remote Connection
could not be established because the remote host name could not be resolved.

Due to our dsl provider configuration both of us are behind a router, so
both of us have private ip address.

Do I need to configure something to make the remote assistant work? I think
this private ip issue is the cause of the problem.

Thanks.

Javier

 

[Guest]

Hi there Javier,

Bob is correct in what he said for the most part, but if you're behind
certain brands of routers, the NAT (Network Address Translator) may be
causing the issue as well. You can enable port triggering for certain
applications to allow them to be directed to your private IP address from the
outside.

If you can get me the make and model of both routers, I'd be more than happy
to research this solution for you further.

Hope this helps!

Best Regards,

~Will

 

[SF Javier]

Thanks for the help. I am not sure about his model, but mine is a efficient
network speedstream 5200 router.

Javier

 

[SF Javier]

Just a weird thing. When I do that the page of Robert suggest I change the
private ip address for the public one that is shown in my brother´s
whatismyip.com but still is not working.

When I do a ping to his public ip address I dont receive an answer and when
he pings my public ip address he doesnt either.

Do you know why is happening this? I mean, this have to do with the routers?

Thanks,

Javier

 

[Guest]

Hi there Javier,

Sorry it took so long, this took a bit of searching.

If you go to http://www.alltel.net/downloads/links/SpeedStream211.pdf this
will provide you with the manual to your router. On page 63, there is a
brief on how to configure your router for port forwarding.

Set your router for Port Forwarding with UDP connection and the port set to
3389. Then set the Redirect selected protocol/service to IP Address to your
internal network address (Your 192.168.1.xx address).

Let me know if this works.

Best Regards,

~Will

 

[Sigmundur Jonsson]

Just a weird thing. When I do that the page of Robert suggest I change the
private ip address for the public one that is shown in my brother´s
whatismyip.com but still is not working.

When I do a ping to his public ip address I dont receive an answer and when
he pings my public ip address he doesnt either.

Do you know why is happening this? I mean, this have to do with the routers?

Thanks,

Javier

First of all, the default for routers is to BLOCK ping packets from the
Internet.
Second, remote assistance is not working because you are behind routers.
please use the logmein.com service. It was made for remote assistance
WITHOUT NEEDING OPEN PORT(woot ^-^).
I've used that service for a long time and it works GREAT .
The only thing you need is a browser so even linux users can use it.
(The servers need to install a program though.)

 

[Guest]

I have the same problem. I am using a linksys router and cant connect to
someone using the 2wire modem. When I connect to someone who does not have a
router(no nat) everything works fine even with my router. I will try port
forwarding on both two see if it works.

Also, just out of curioisity, why does it not work with NAT? Does is not
replace the internal private ip with a public ip? Maybe the private ip
address is also included withing the data stream of the tcpip packet that >:{
b.g uses to resend the reply instead of reading the "return address" on the
packet??

 

[q_q_anonymous]

I have the same problem. I am using a linksys router and cant connect to
someone using the 2wire modem. When I connect to someone who does not have a
router(no nat) everything works fine even with my router. I will try port
forwarding on both two see if it works.

I don't think you do it on both. You do it on the one you're connecting
to.

As it naturally looks, it's the other guy , the 'someone' that's the
problem. You were fine before, then that other guy changed his thing,
and it screwed up. So you don't need to know much to identify him as
the problem. But technically, it's his fault too. NAT Routers don't
automatically do port forwarding, and if they don't then you won't be
able to connect, it will fail. He has to set port forwarding.

Also, just out of curioisity, why does it not work with NAT? Does is not
replace the internal private ip with a public ip?

yes
it does work.

Maybe the private ip
address is also included withing the data stream of the tcpip packet that >:{
b.g uses to resend the reply instead of reading the "return address" on the
packet??

no. it's only the public address there. it should work.

I think it should work with NAT. (have you ever heard that it wouldn't
elsewhere? no!)

I don't know what WIlliam Anderson was getting at when he said that
some brands of NAT routers have a problem and others don't. He
didn't explain . I've never heard of such a problem. Though in the
end he recommended port forwarding. Indicating that he doesn't think
there's 'problem'.

William Anderson: It'd be nice if you could explain what you were
getting at. I would reply to your post directly to ask you, but
google doesn't allow replies to posts older than 30 days old.