I am going to setup a server at my office for business use, I am going to use it as webserver , mail server and SQL server. the OS is windows server 2003 small business edition premium.
my question is what is the best solution to secure my server from internet hackers and attacks ?
currently I am using linksys WRTP54G router which has a built in firewall, but I dont know if it is enough or not ? do I need to buy a hardware firewall to protect my server or software firewalls would do well ? and if I need to buy a hardware or software firewall , what do u suggest ?