Re: Reaching BT Internet Customer Remotely

ChrisEccles wrote:
Plusnet Support Team;186281 Wrote:
ChrisEccles wrote:-
Problem:

......When she does a whatismyipaddress.com search,
she gets 86.163.93.181. If I try to enter this in Remote Desktop,
it doesn't appear to relate to her machine at all, but comes up with
some kind of generic btinternet location in Milton Keynes and,
of course, access is denied.-

Hi Chris,

Looks fine to me and is exactly what I would expect from a BT Retail customer.

nslookup 86.163.93.181
Name: host86-163-93-181.range86-163.btcentralplus.com

The IP is likely to be assigned dynamically though so may well change should your friend disconnect and reconnect. Because of this you may want to consider using a dynamic DNS service like this one - http://www.dyndns.com/services/dns/dyndns/

Are you sure the relevant port mapping has been applied at your
friend's side and that their firewall isn't blocking the connection attempots?

--
|Bob Pullen Broadband Solutions for
|Support Home & Business @
|Plusnet Plc. www.plus.net
+--------------- twitter.com/plusnet ----------------

Thanks, Bob.

I've tried assigning a dynamic DNS already and it constantly comes up
as 'offline' in ARD.

She has 5900 open on the firewall and the normal ARD port of 3283,
also.

I've queried BT Broadband, her provider, but no replies as yet.

Her IP address has been the same through a number of connections and
disconnections so I am assuming a longlease assignment. Even if it was
truly dynamic, surely we could still get a connection during one
session of work ? ? ? Yes ?

Thanks for the suggestions.


However you still need to arrange passthrough to the socket number the remote sofrware uses.

The way NAT works, is that incoming packets that request a TCP connection (SYN) are viewed by the router, and dropped. On the basis that no one should be attempting a connection to a machine inside the local network.

Mostly that is not a BT policy AFAIK, its a router policy. It would not be the first time a support droid has fibbed someone off with a load of bollocks.

To get and incoming connection to connect to a machine inside, you need to tell the router that that port is associated with a particular machine inside. E.g. here I have a web server, so port 80 (http requests) are NOT dropped, they are passed to that machine (which needs to be on a FIXED IP address inside the network, so the router can have a simple rule).

How you do that is router specific.


So, in general to get a desktop machine to acept incoming requets you need to do the following.

1/. set that machine up on a fixed IP address, either by not using DHCP, or by associating a fixed IP address with its MAC address in te router tables.

2/. discover what port te software you want to use uses, and arrange passthrough for that port to that machine's IP address.

3/. Work out what public IP address te target is on. hen yiou have to either use that IP address directly, or use a service like dyndns to tell a name server what IIP address you are ion today, so a dns lookup works.

4/. finally, for safety, if YOU are on a fixed public IP address, you should restrict access to the service to YOUR IP address alone.

Unfortunately all this is configuration at the remote end. If she needs assistance, it's unlikely she could set it all up anyway..;-)

Although if you have remote access to the router, you could do it yourself, BUT, configuring routers remotely is tricky. I don't want to say how many times I have locked myself out of a router and had to phone 'could you just reboot the router' Assuming its the sort that doesn't save changes unless you explicitly make it do that.



Chris




.

Relevant Pages

  • Re: Using Remote Desktop From an SBS Domain
    ... when you tried to RDP while attached directly to a port on your router? ... So if 3389 needs forwarded on the client end too then that is what the ... Hopefully next week I can attempt a connection while my ISP watches the ...
    (microsoft.public.windows.server.sbs)
  • Re: Using Remote Desktop From an SBS Domain
    ... when you tried to RDP while attached directly to a port on your router? ... Internet to initiate an IP conversation with your computer. ... This situation is different than if you ran your own NAT connection sharing ...
    (microsoft.public.windows.server.sbs)
  • Re: Setting up Home Network w/ 2 Routers
    ... successfully got my 2Wire, Netgear, and Linksys playing nicely. ... Connected the LAN port #1 of 2Wire to the WAN port of the Netgear. ... connection type and all for me. ... If you add another router to the mix, just make sure to disable the ...
    (microsoft.public.windowsxp.network_web)
  • Re: Session terminated
    ... There is not as far as I know a site available to facilitate the connection, but you can still do it with an IP address. ... The IP Address is your PC, the Gateway is your router. ... All of the docs I have specifically state that XP Pro and XP home can use remote assistance. ... This link states that the Home versions and Pro versions cannot use RA between them, which means you can only have home assisting home, or pro to pro. ...
    (microsoft.public.windows.mediacenter)
  • How did they get behind my NAT?
    ... this point I panicked and shutdown the VNC service ASAP. ... My question is how the attacker got to my VNC port! ... the internet through the router. ... client connection using local port number 5900 (which was also being ...
    (alt.computer.security)
Loading