The server is not protected until you install a client. At the minimum, install the AV/AS feature on your server. Note PTP is not recommended on server OS's. See RECOMMENDED CLIENT PROTECTION POLICIES (Page 32) of the
Symantec Endpoint Protection Small Business Edition 12 Best Practices document.
ftp://ftp.symantec.com/public/english_us_canada/products/symantec_endpoint_protection/12.0_sbe/manuals/Best_Practices_SEPSBE12.pdf
For all SEP 12 documentation see - http://www.symantec.com/business/support/documentation.jsp?language=english&view=manuals&pid=55357