At 10:23 -0400 10/12/2001, Stefan Jeglinski opined: >Also, is it my imagination, or are there fewer PTR records as time >goes on anyway? In my admittedly minuscule sampling, it almost seems >like fewer and fewer PTR records exist, perhaps because admins >somehow think the "anonymity" will keep them low on the radar w.r.t. >crackers?
I think the decline in PTR records probably has more to do with fundamental changes in the way IP addresses are allocated. It used to be that IPs were controlled in large monolithic blocks, and it was unusual for an IP to be associated with more than one domain name. Control of the authoritative DNS for the PTR record was very likely to reside with the owner of the machine associated with that IP. Now, IP blocks are fragmented and resold at many levels. IP sharing is common. My main IP address has something like 18 domain names associated with it. I do not own the delegation for the IP address, and obtaining that delegation would cost me a significant amount of money for zero increase in functionality (since any authentication scheme that used reverse lookups would only stand a 1 in 18 chance of success). Fortunately, my ISP does provide a PTR record, even if it is a hideously ugly one. --Ron -- Ron Risley || ...the poet's pen [EMAIL PROTECTED] || Turns them to shapes and gives to airy nothing www.risley.net || A local habitation and a name. ############################################################# This message is sent to you because you are subscribed to the mailing list <[EMAIL PROTECTED]>. To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
