On Tue, 28 Sep 2004 10:47:20 -0400 Kris Deugau <[EMAIL PROTECTED]> wrote:
> Bob Apthorpe wrote: > > I also firewall traffic from unassigned ARIN netspace - see > > http://www.iana.org/assignments/ipv4-address-space. > > I did this for a while, but somewhere along the line some of those > unassigned netblocks got assigned. I didn't discover this until about 6 > months after one corporate customer suddenly couldn't send mail to one > of their suppliers. Fortunately I had implemented a workaround in the > meantime. > > I've since removed that section of my firewall setup. It changes slowly but you definitely need to stay on top of it (and yes, I've been caught by this as well.) As mentioned before, Cymru.com has some great resources for keeping current. I'm especially fond of their IP -> AS lookup tool. -- Bob Apthorpe
