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what are the implications of changing the external IP address of a webserver

Basically the company that we rent our webserver off and making us change our external IP address and i was wondering if anyone had done this before or if there was a set of procedures that i need to follow to make sure that all the websites and emails that we host are all working ok after the changeover.

i know i have to change things like the nameservers ip address (but im not even sure how or where to do this), also change the all the websites ip address in DNS

so if someone could give me a plan or knows where i can find one i would greatly appreciate it

Thanks
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admoortown
Asked:
admoortown
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fosiul01Commented:
Ok

Main thing you need to know

MX record, A record

suppose you domain www.abc.com 
has name server : ns1.abc.com : 11.22.33.44
                              ns2.abc.com : 44.55.66.77

Mx Record : 12.23.34.56

A record : 12.23.34.56

Now if you change the IP for nameserver from EXisting one to a New setup of Ip, it will take 24 to 72 hours to propage world wide

Chaning the Nameserver is main problematic because it take long time to refresh.

but if you just want to change

Mx record and A record it would be refresh as soon as changed applied

for your case
which one you want to change ??
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admoortownAuthor Commented:
i will be able to change any of the records in DNS from the old ip to the new one without any problems as we can RDP into the server.

my problem is im worried incase i forget to change something very important !

how would i change the ip address of the name servers to??
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fosiul01Commented:
Make sure

is this changing of Nameserver

or just change of MX record and A record

let me give you an example

suppose our domain www.abc.com

our isp is responsible for Dns server so Nameserver ns2.abc.com and ns2.abc.com is pointed to isp

now suppose currently our MX record is poing to our office ip which is 1.1.1.1
and A record is same 1.1.1.1

now today isp is saying that your ip is 2.2.2.2
so we just need to telll isp to change mx record and A record from 1.1.1.1 to 2.2.2.2

thats it.

but suppose we want to change the Isp so we went to another isp so we want to give the dns management from old isp to new isp
then we need to change the nameserver address from old isp to new isp

in that case you need to change nameserver from Old ip to new Ip , where it sould be 2 ip, because you need to name server .


now how do you chagne the ip of nameserver : are you responsible for dns management ?? normaly we do this via domain control panel


if you want, you can email me the domain name to expertalert at gmail dot com
i can havea look , and then can ask you some more questions [ if you want]
other wise , ask me here, i will try to explain as much as i can
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admoortownAuthor Commented:
we are responsible for the DNS management of our name servers and also for our websites  we will be able to change the mx and A records ok.
the name servers is one of the main problems at the minute.

also do you have any strutures or procedures for changing the external ip address of a webserver, i just want to be sure that i have everything covered. eg. emails / ftp / iis

things like that if that makes sense lol
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fosiul01Commented:

for changing name server as i said you need to do this from domain control panel, do you know how to do ??







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admoortownAuthor Commented:
we bit the bullett and got everything changed over - the main trouble was waiting for the DNS to refresh as customers couldnt wait 1 day!!

typical

thanks
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