Another Portal Log on page

Dear Experts,

We have Development Portal(HR Portal ED1),it is connected to Backend System(Dev HR System ECC EHP5-EC6).

if we type http://<hostname of the server>:50000/irj/portal it is opening our customized Enterprise portal logon page.

Recently we got another requirement from Business..we need to develop one Security log on home page in the same server.

For ex: http://<security.companyname>.com it will redirect new portal security log on page.

We need to maintain two portal log on pages in the same server.How we will achieve this.Please suggest me.

1)http:<hostname of the server>:50000/irj/portal ----> Customized Portal Home Page

2)http:<security.companyname>.com ------>New Security Portal home Page(New Requirement).

Regards

Chandrasekhar.