Solved

Backup internet line

Posted on 2014-10-27
6
183 Views
Last Modified: 2014-11-12
Hi there, im trying to work out the best options and if there are any options i have not thought of for when you have a backup internet line in place.

If you have a on site exchange server and your main internet line goes down, hopefully your backup internet line kicks in, how would/should things like your DNS/MX/A records/external IP addresses be site up on the domain name to allow for email to still be able to hit your exchange server on the backup IP address if your main line and main IP address are down?

I guess this would also apply to if users connect to the server with a VPN

Thanks
0
Comment
Question by:David
  • 3
  • 2
6 Comments
 

Author Comment

by:David
ID: 40406538
In the case im thinking of, the backup line will not be active until the main line is down,
0
 
LVL 13

Assisted Solution

by:Andy M
Andy M earned 250 total points
ID: 40406549
Regarding Exchange one method would be to setup two MX records/host records (A - main line and B - secondary line). You would have MX record A with the lowest preference (i.e. 10) and record B with a higher preference (i.e. 90). In the event the main line (A) went down other email servers would then try the secondary line (B) as they wouldn't get a response on the main line.

VPN is a bit of a different issue - either users would need to change the IP address on the vpn connection when the main line went down or you would need some sort of dns failover service so that the hostname used to connect would switch between the two ip addresses as required.
0
 

Author Comment

by:David
ID: 40406582
i guess it could be set to have VPN1.mydomain.com for the main IP and VPN2.mydomain.com set to the backline line IP. And tell users to try the VPN2 if there was trouble

do you have any recommendations for the DNS fail-over service?
0
What Should I Do With This Threat Intelligence?

Are you wondering if you actually need threat intelligence? The answer is yes. We explain the basics for creating useful threat intelligence.

 
LVL 63

Accepted Solution

by:
Simon Butler (Sembee) earned 250 total points
ID: 40407325
Don't try and overcomplicate this.
Dual WAN router, two DNS entries. Nice and simple.

Or look at something like a cloud based load balancer.
http://totaluptime.com/solutions/cloud-load-balancing/

Simon.
0
 

Author Comment

by:David
ID: 40407335
Ok with the two DNS entries, i think the MX records is easily done, but what about the VPN entries?
0
 
LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 40407345
The only way I have done it in the past is to have two VPN connections. A primary and a backup.
DNS does not provide any kind of high availability, it has no service awareness. If you want something completely transparent then you need a load balancer (either your own in an independent data centre or a cloud based service).

Simon.
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

We are happy to announce a brand new addition to our line of acclaimed email signature management products – CodeTwo Email Signatures for Office 365.
This process describes the steps required to Import and Export data from and to .pst files using Exchange 2010. We can use these steps to export data from a user to a .pst file, import data back to the same or a different user, or even import data t…
The video tutorial explains the basics of the Exchange server Database Availability groups. The components of this video include: 1. Automatic Failover 2. Failover Clustering 3. Active Manager
how to add IIS SMTP to handle application/Scanner relays into office 365.

746 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

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now