I have a customer with an ASA-5505 running 8.2(5). There is an internal domain, and the DCs are using local ISP and public DNS forwarders. About a week ago, users started to drop their Internet connection because of name resolution problems. What I've noticed is that no machine, when the internet is down, is able to successfuly receive a response to an nslookup to even a public DNS server on the Internet. I'm at a loss as to what to try next. Any thoughts? Thank you.