Re: Dial up and cable modem
vnc "at" bmsgharr.globalnet.co.uk
Mon Jul 15 22:26:14 2002
Sunday, July 14, 2002, 6:22:00 AM, you wrote:
BM> The problem is that both ends of the connection will (probably) have a new
BM> IP addressed each time he connects to the ISP. My cable modem IP
BM> changes a couple times a month. A dial up would change every time he
BM> connects. VNC client needs to know the IP of the VNC server to make a
BM> Two possible solutions: 1) Use a utility to periodically determine the server
BM> IP and then e-mail it to the client computer if it has changed.
BM> 2) Another is registering a domain name for the server and sign up
BM> with one of the dynamic IP updating services. (There are a number
BM> of dynamic IP services, I happen to use www.changeip.com).
BM> And perhaps VNC will allow us the option of using of domain names
BM> someday in the future.
It does already, as at work I use the machine name rather than the IP
address because we have DHCP on our network. This is because (I
assume) Host name look up (DNS) is already part of the TCP/IP
protocol. How do you think the Internet works? Try connecting to
http://220.127.116.11/ this is the IP address for www.bbc.co.uk. I.e.
your Internet browser will tell the IP stack on your PC to go to its
DNS server/local DNS cache and retrieve the specified IP address from
that cache or server. Therefore using a machine name instead of a IP
address should work. The only problem is that the name (for example)
the local host name is not usually available to the DNS Servers on the
Internet. This is in part due to how the WWW (not to be confused with
the Internet) works.
So point 2 will work, to a point because the DNS servers on the
internet only know about domain names i.e. *.com, *.co.uk, etc......
The other solution is to get a ordinary modem in his home pc and
either dial directly into his office network or his PC. Only assuming
that the IT bods at his office allows him to dial in remotely.
Graham mailto:vnc "at" bmsgharr.globalnet.co.uk