“With the advent of high-speed Internet links from
Internet Service Providers (ISPs), it’s easier for users to host
services on their home computers. But what happens when your ISP
connection goes down? An obvious solution is to have a redundant
Internet connection from another ISP. To help set up a Linux host
with redundant Internet connections, this article covers the
following essentials:
- Configuring the host to properly handle inbound network
connections from multiple ISPs- Load-balancing outbound network connections
- Configuring various services to enable redundancy
- Configuring firewall protection using ipchains or
iptables”