At the moment I'm running a T1 to a Cisco ASA 5505 device. I'm in the process of getting a backup ISP. My question is, is it possible to configure this firewall with two ISPs so that the same internal webserver can be accessed via backup ISP?
The issue you will have is with the DNS needing to be changed to the the backup providers ip when the primary goes down.
Here are some ideas to make this happen,
Option 1. Work with both providers to support routing BGP to you
Option 2. Each ISP will give you a different range of ip addresses, Setup static mappings / forward ports from ips from both providers assigned ips to the same internal webserver or if is dhcp just forward the port from assinged address. Then use a third party DNS provider that allow forwarding with redundancy.
Option 3. Utilize dynamic DNS with a third party DNS provider.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.