I have some strange problem (probably DNS) inside my local network in office.
VMWARE XSI server running 2 virtual servers right now, Ubuntu server (For apache web server) and windows 2008 Srv as DC. My problem is strange, when i'm trying to access ubuntu via SSH or any other protocol from local network, response from server can take up to 10 seconds,
But when i'm trying to access websites stored on this server there is no delay at all.
We have Fortigate 50b appliance as IPS and router in our local net. It is DHCP server as well.