webserver security issues

[nawalmiftahi () gmail com]

Hii we are in a process of building a webserver for our company and i am giving the task of finding the security issues 
in webserver building , can any of u let me know about the security issues in a webserver,and we have a internet leased 
line of 2mb , getting a new leased line for the webserver is good or upgrading the existing one to 4mb, your quick 
response i highly appreciated.