On 2010-10-17, at 21:48, Richard Bourne wrote:
We are having a little trouble with a new IPv4 address range recently received from APNIC. The range is 223.165.16.0/22 (although according to APNIC it affects the entire /8). Please see the attached email. It seems that there are some routers which have blocks on this range, which need to be lifted. Some of the sites we cannot connect to include: airnz.co.nz and dse.co.nz. We suspect some email is also not getting through.
Can anyone suggest how best to get these routing blocks lifted? My shiny new IP address range is starting to feel distinctly second-hand.
223 is the last /8 in what was once called class C, immediately below the threshold for class D (multicast). Through the years people have made assumptions about reasonable use of such dark corners of the addressing plan, and you can expect a certain amount of pain. You are not the first person to experience this. Your shiny white allocation is in fact rather stained and grey, but since that's all there is left you might find you have to find ways to live with it. Welcome to the end of days. You might try - making noise on mailing lists (you never know, it might work) - performing active measurements to many remote networks and trying to identify the autonomous systems whose internal policies seem at odds with your expectations, then contact them and see if they can help - start harvesting examples from your logs of half-open connections, delivery failures, connection failures, etc, and attempt to contact the remote organisations involved There is no magic bullet. Joe