ePO can manage the linux shield as well. Now you just need to know what you want to scan. LinuxShield will do the server and maybe some email but only solutions from beginfinite or messaging architects can effectively scan your groupwise system. There are whole suites that scan GWIA, POA, WebAccess etc. My suggestion would be to look at hardware appliances at the edge to filter all the crap before it gets to the GroupWise system and if you still feel unprotected then secure the POA. Hope that helps!
Brian Hughes
Network Administrator
A+,MCP,MCSE2000,MCDBA2000,CNA 5.1/6/6.5