Not possible with most modern IRCD's since they check forward and reverse dns. So for example if your address is: 1.2.3.4 and that resolves to: 1-2-3-4.dsl.verizon.net the ircd make sure that: 1-2-3-4.dsl.verizon.net resolves back to 1.2.3.4 it's a simple and elegant solution that basically stops spoofing of this nature, on IRC anyway.... Adam On Feb 11, 2005, at 10:45 AM, Ketil Froyn wrote:
Isn't it a good idea to collect the IP addresses rather than the ptr name? For instance, if I were an evil person in control of the ptr record of my own IP, I could easily make the name something like 1-2-3-4.dsl.verizon.net, and if you didn't collect my IP, you can never be sure you got the right details!
Something like this is probably not very widespread (has anyone seen it in practice?), but I still think that for tracking purposes, ptr records are useless. IMHO.
Ketil
!DSPAM:420cd46b173571891151301!