Re: ALL: PARANOID from /etc/hosts.deny Should be Commented by default
On Sat, 21 Apr 2001, Daniel Stone wrote:
> On Fri, Apr 20, 2001 at 09:45:23PM +1000, Hamish Moffatt wrote:
> > On Fri, Apr 20, 2001 at 07:29:26PM +1000, Daniel Stone wrote:
> > > Aye, but I believe it was Hamish who suggested that PTRs should be made
> > > mandatory.
> > That's right. There is no good reason for them not to exist.
> Here's where theory and practice come into play. I only have a small chunk
> of 203.36.158.* (113-127, afaik), so how can you DNS-delegate that? At
> least, if there is a way, Telstra haven't figured it out yet.
There are ways, some easier than others depending on your DNS server, to
delegate reverse-DNS for subnets smaller than /24. If Telstra is unwilling or
unable to do this, they should be perfectly capable of providing you with
*some* valid reverse DNS that matches a forward DNS name that they have
control of. This is not difficult to do, and it doesn't require Telstra to
cater to vanity DNS names. They could use a script to populate their zone
files, fer chrissakes, and just give everybody dns names of
num-num-num-num.customer.telstra.net. There's no technical reason why any ISP
should be unable to provide this service for all IPs they assign to customers.
Indeed, within ARIN's jurisdiction ISPs have an obligation to provide this
service. I find it rather appalling if an ISP as big as Telstra doesn't have
support staff knowledgeable enough to do proper DNS.