IP Address

[sapper]

How easy is it to change an IP number/Address?

Do i need to switch my modem of for a few hours or so or longer?

Iknow IP numbers are assigned dynamically but how often canthey cahnge?

Adrian

[stuker]

there are a a couple of ways to do it depending how you are connected. Are you directly attached to the modem or running over a router?

What do you need to change you IP address for?

[sapper]

there are a a couple of ways to do it depending how you are connected. Are you directly attached to the modem or running over a router?

What do you need to change you IP address for?

At the moment i connect through a netgear router...

I know sometimes that if youdisconnect your modem for a few hours upon reconnection youwill be assigned a new IP address...

The reason, I am having issues logging into a forum I use, and it wont allow me to log on, it doesnt seem to recognise my IP address as valid.

Their support suggests that whilst they look into it, a new IP address would probably be a simple fix...

Adrian

[stuker]

ok i am assuming you are doing NATing on the router with DHCP on which means it will assign your PC an address in the 192.168.x.x range dynamically. This is not the IP address the forum will see however. It will see the address assigned by VM which are in the 80.x ranges i think. This will appear as the WAN address in your router config. These addresses are dynamically assigned by the DHCP server at VM in the same way you router assigns your PC an address. The address has a lease time with the server (usually 48 hrs but can vary) after which it will renew itself. Turning off your modem is a way of refreshing the IP address but there is a chance that it will assign you the same address again.

What you could do is plug you PC straight into the modem (either ethernet or usb should be the same) and then go into the command prompt (assuming you are using windows) by clicking start > run > cmd (you need to type cmd in the open test field) and a dos box will appear

then in the "dos" window type

ipconfig /renew



this should release the ipaddress currently assigned to the adaptor and request a new one from the DHCP server. Hopefully the one it gives you is a different one from the one you have. You may have to wait a few seconds for this to take place.

you can check this by then typing ipconfig by itself which will display all the ip configuration info for the adaptors

hope this helps