[clug-talk] ISP changing static IP

[Kin Wong]

My ISP is changing my static ips again.  I am running IPCop with two 
static IP facing outwards and a couple of public servers (web server and 
email - yes I know it could be done on one server or even one static ip 
- just haven't got around to it yet) on the inside.

I need to change the static ips which is a simple enough process in 
IPCop, but how do I do it without loosing public access.  I can change 
these values on the IPCop box and then changed the A-records and 
MX-records.  As it takes a while for the latter two changes to take 
effect, I believe I would loose some access or communiction.

Would it be better to install a second IPCop box on the same network set 
to the new static IPs and change the A-records and MX-records.  Then it 
would not matter if the dns records have not propagated, communication 
and access will still be there.  However the internal address of the 
second IPCop box must not conflict and the DHCP server needs to disabled.

After a couple of days, the first IPCop box can be eliminated.

Am I on the right track or way out in left field?