I'm having issues with my Windows 2000 DNS Server, in which it is having issues with one particular website. We've been using this corporate business partner site for years without issue. Recently, one day no one could get into it (site not found). I tried an outside internet connection and the site came up fine. I went into NSLOOKUP, resolved the site properly with my DNS server and then everyone could get in. The next day, the same issue occurred.
It appears that after 12 hours, the site is cleared from cache in my internal DNS server. When this happens and clients request the site, it responds with site not found. It won't get added back into the DNS server until I use NSLOOKUP.
My internal DNS server works fine with every other site I've tried. I've gone to sites that I know no one internally has ever gone to and my internal DNS server is contacting my ISP DNS and getting the IP.....all except the one site I really need.
Keep in mind, this internal DNS server has been in place for over a year and nothing has changed recently with our infrastructure. Any ideas?