We use OS X 10.5 as our LAN DNS server, all PCs point the DNS to this server.
Since a few months ago, we noticed the 1st page of the website takes along time to appear, sometimes almost a minute, but clicking on links within the same website is very fast i.e. less than 3 secs. Using the IP address of the website is also faster than using the domain name.
Our server is not overloaded i.e. CPU utilization less than 5% and we are on Gigabit Ethernet Switch. Our Internet connection is also not congested i.e. ping to industrial strength website is flat and not spikey.
Any suggestion on what could be the cause? any comments welcomed.