Configuring linux for Tomcat web hosting

[Srivastava, Abhay]

Hi,
   I have created a website running on Tomcat 6.x and have also
purchased a domain. The OS I am using is Ubuntu 7.1 (linux). Can anyone
help me with configuring the linux so that my host name can direct to
tomcat server.
 
Right I have a static IP address and I can direct my domain name to this
static IP address. Now my Tomcat is running behind a router with a DHCP
configuration. What configuration I need to do configures my linux an d
Tomcat.
 
Any help will be appreciated.
 
Thanks in advance.