Verio route filtering policy + NAT&DNS failover (posted 2001-12-31)

The weeks from September 23 to October 7 saw two heated discussions on the NANOG list. The first one was on filtering BGP routes. It all started with some remarks about Verio's peering filter policy but the discussion became more general after some days, including related topics such as "sub-basement multihoming".

The second discussion was about (ab)use of the Domain Name System for failover (in combination with a NAT box) and load balancing. This discussion seems to be somewhat religious: some people think there is no problem, others nearly start to foam at the mouth just thinking about it.