(Ted Harding) wrote:
On 14-Oct-07 21:42:59, Aniruddha wrote:
On Sun, 2007-10-14 at 14:34 -0700, joe wrote:
Aniruddha wrote:
My brother get his ip adres through DHCP from a large college lan, his ip changes with regular intervals. I wonder is it possible reserve one particular ip for his machine and if so how do I do this?
Sure - are you the admin of the dhcp server?
Joe
Errr, I am afraid not. He just receives his ip adress through dhcp.
There is one thing he could try, which may or may not work often enough to to be useful.
Say he gets a particular IP address one time. Let him note that, and configure his own machine to have that IP address statically configured in his machine (this may involve setting up a static DNS and gateway too, so it might not be trivial).
Then, if when he next connects, that particular IP address is free the remote server should simply recognise that he is using it, and not try to give it to anyone else. Since it's static on his mkachine, it would not change so long as he remained connected.
(This is exactly what I do on my home LAN, by the way: The ADSL router gives out dynamic IPs by DHCP to any connected machine that asks for one, but does not interfere with any machines that have static IPs configured in them; and whenever I connect some other machine -- e.g. I'm trying out different Linux distros in virtual machines and off live CDs at the moment, and they all ask for DHCP in the first instance -- the router aloways gives them an IP different from the statitically configured ones. Of course, if one or more of the statically configured machines was switched off, then presumably the router could use one of their IP addresses, since it's not in use).
Whether this suggestion is useful would depend on the demand for IP addresses on that campus. If an idle IP address gets snapped up quickly, then it would be no use at all!
On the other hand, if his disconnections are brief, then there may be a good chance that this trick could work well enough.
If it failed at any time, of course, then he'd just have to revert to DHCP for that connection.
Some networks will refuse connections from a computer that doesn't have a MAC address that's currently assigned an IP. Also, network admins can turn into nasty trolls (not that they aren't already <g>) when they find someone using a static address. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org