There's a huge latency when I try to connect to our server (Ubuntu server 192.168.53.1) through SSH from a client PC (windows 7 + putty: 192.168.53.X) in a LAN. It takes like a minute for the password prompt to show up. There's also a huge latency when I try to connect to the mySQL database running on the same server. This server is also running SAMBA but this is running very smooth.
Here you can find our network diagram: link text
Any help would be appreciated.