To host website at multiple ISPs

Hi guys,

I have following question...

For example if I host a website at two ISPs... lets say ISP_1 and ISP_2.. and I have 4 name sarvers:
NS1.ISP_1.com
NS2.ISP_1.com
NS1.ISP_2.com
NS2.ISP_2.com
This makes some sort of protection from possible DNS issues.

But what I have to do if I need to make a protection from possible Apache/MySQL issues? I'd like to make so that if Apache at ISP_1 goes down then all traffic from ISP_1 being redirected to ISP_2 and invertedly..

Thank you for your help and attention.

Originally Posted by vasam

For example if I host a website at two ISPs... lets say ISP_1 and ISP_2.. and I have 4 name sarvers:
NS1.ISP_1.com
NS2.ISP_1.com
NS1.ISP_2.com
NS2.ISP_2.com
This makes some sort of protection from possible DNS issues.

No, it doesn't. Also, for what you're trying to achieve, you need some sort of DNS failover setup.

Originally Posted by vasam

But what I have to do if I need to make a protection from possible Apache/MySQL issues? I'd like to make so that if Apache at ISP_1 goes down then all traffic from ISP_1 being redirected to ISP_2 and invertedly

You need some sort of load balancing system with at least two servers in a cluster.

Regards,

Jaime

Get your DNS hosted somewhere with a proper N+1 name server setup. A good ISP should have at least two off network, different physical location, name servers to safe guard against "DNS issues".

You can use DNS in a crude way to build in some kind of load balancing. Otherwise google FreeBSD Load Balancer. There are some very good configuration walkthroughs out there on how to build a stable load balancer.

Hope that helps.