How do you find out what the external hostname of a bt broadband connection is?. I have navigated to the ip configuration information on the bt home hub router and have found the external IP address is but saw nothing about what the hostname is. I wish to reliably address a computer at home through an opened port from an external network.
The hostname will be derived from the IP address, and will change whenever the PPPoE connection is made.
You can find it out from http://www.displaymyhostname.com/ and other sites, but won't be very helpful.
Mine at the moment is host31-52-xx-xxx.range31-52.btcentralplus.com (xx substitued for real numbers).
If you want a fairly fixed external name you can get one through DDNS, using a service such as noip.org.
You can even set up the HomeHub to interact properly as needed when your IP address changes.
You could simply use the IP address allocated, provided the router is not switched off for any length of time and BT do not flush the DHCP tables on their routers.
A device when its DHCP lease is refreshed always asks for the same IP address and will unless the lease has expired and the address has been given to another client get the same address unless the DHCP table has been flushed.
on an internal network http://192.168.1.254 is your router
an external address for you router is (especially if the IP is static) would be the ip address seen in the router IU for your connections
I agree with what sjtp has said.
In addition, if you want to connect to your computer, you need to read this http://btsupport.custhelp.com/app/answers/detail/a_id/44044/c/6433 and then opt out. If you have a shared IP address, then there's no way to make an incoming connection.
Thanks to all for your responses. I had been hoping that BT had set up a fixed hostname. But hey, you've got to work with what you're given. I'll look into the noip.org when I get home and opt out of the IP sharing.
My other thoughts is that I should reverse the problem and automatically ping (every hour or so) from my bt network to the remote one this way I can scavenge all the information I need from the ping and store it as the 'most up to date' information ready for when I want to access my home network.
Once again thanks