Sysadmin: Multiple ISP firewall – The setup
After suffering broadband trouble for the past 9 months, including interruptions that lasted a few days, I decided to get an additional line installed by a different ISP. I could have bought one of these multi-WAN devices but decided against it for a couple of reasons: I like a challenge and I wanted to achieve... » read more
For months, every time more than a handful of connections were made between my ex-employer's office in Shanghai and their email server in Hong Kong, the latter would become unreachable, not just for email but for web access as well. The strange thing was that access to the rest of the Internet would be untouched.