can't resolve www.yahoo.com
I am having a very weird problem. I can resolve just about any address EXCEPT www_yahoo_com from my internal network. It WILL resolve on my external name server/web server box. DNS lookups first go to an internal name server, which has forwarding to the external name server turned on (this is done through a firewall). It was working fine until about 3 days ago. No changes have been made on the internal network. If I do an nslookup to www_dcn_yahoo_com (www_yahoo_com is an alias for this), it works just fine from an internal network PC. Apparently, ONLY www_yahoo_com does not work.
Has anyone else seen this kind of a problem? Could it be a caching issue (after 2 days)?
The external name server is a RedHat 8.0 box using BIND 8 and forwards to my ISP.