Solved

DNS fail over for webserver

Posted on 2011-09-14
3
686 Views
Last Modified: 2013-01-02
Hi,

We are planing to introduce auto proxy script via DNS. Currently wpad.dat is published via IIS server and clients can download the wpad (http://wpad.domainname.co.uk/wpad.dat - 192.168.x.1) file and dns record is set as wpad - 192.168.x.1 and can browse according to the script. We would like to create 2nd IIS (webserver) with the same script for load balancing and failover, just wonderring how can we achieve this.
0
Comment
Question by:eddiemartin
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 4

Accepted Solution

by:
AnthonyHamon earned 250 total points
ID: 36537598
The simplest solution is to use DNS round-robin load-balancing.  The wpad.domainname.co.uk DNS entry would point to IIS1 & IIS2.  When clients resolve wpad.domainname.co.uk for the first time the IP address of IIS1 would be returned, next time the IP address of IIS2 would be returned and so on.  The drawback is that if either IIS server is down, every other attempt to download the wpad.dat file would fail.

Another option is to use Microsoft NLB (Network Load Balancing) so that each IIS server shares a virtual IP address.  Normally, IIS1 would assume the virtual IP address, until IIS1 fails, at which point IIS2 would assume this virtual IP address.  wpad.domainname.co.uk would resolve to this virtual IP address.  You will need to check the limitations of NLB to ensure that this solution will work in your particular infrastructure.  This provides seamless failover, but not load balancing

A third alternative, which is rather expensive, is to use a hardware based load balancer such as a Nortel Alteon or F5 device

I hope this helps.
0
 

Author Comment

by:eddiemartin
ID: 36541252
Thanks for the information, we are looking more on to a filover machanism rather than load balancing as we will have to keep an eye on the IIS server for wpad publishing. Script itself is not more than 2KB when published but we have 2000 odd users.
0
 
LVL 7

Expert Comment

by:elawad
ID: 36901865
please check the following article it could help you.

http://support.microsoft.com/kb/970759
0

Featured Post

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I was prompted to write this article after the recent World-Wide Ransomware outbreak. For years now, System Administrators around the world have used the excuse of "Waiting a Bit" before applying Security Patch Updates. This type of reasoning to me …
For anyone that has accidentally used newSID with Server 2008 R2 (like I did) and hasn't been able to get the server running again because you were unlucky (as I was) and had no backups - I was able to get things working by doing a Registry Hive rec…
This tutorial will walk an individual through locating and launching the BEUtility application and how to execute it on the appropriate database. Log onto the server running the Backup Exec database. In a larger environment, this would generally be …
This tutorial will walk an individual through the steps necessary to configure their installation of BackupExec 2012 to use network shared disk space. Verify that the path to the shared storage is valid and that data can be written to that location:…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question