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

Posted on 2009-02-17
Last Modified: 2013-12-24
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

Question by:admoortown
    LVL 29

    Expert Comment


    Main thing you need to know

    MX record, A record

    suppose you domain  
    has name server : :

    Mx Record :

    A record :

    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 ??

    Author Comment

    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??
    LVL 29

    Accepted Solution

    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

    our isp is responsible for Dns server so Nameserver and is pointed to isp

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

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

    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

    Author Comment

    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
    LVL 29

    Expert Comment


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


    Author Comment

    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!!



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