Hi, There is a fantastic "Guide to the Secure Configuration of Red Hat Enterprise Linux 5" PDF available here: http://www.nsa.gov/snac/downloads_redhat.cfm?MenuID=scg10.3.1.1 It looks like it would be an invaluable resource for research for the Fedora Admin Guide. Among many other things, it covers IMAP/POP3, DNS, Web, Samba, Proxies, LDAP etc. Kind Regards, Murray. ------------------------------------------------------------------------------------------------------------------------------------------------------------- pub 1024D/81B3FDEB 2007-09-19 [expires: 2008-09-18] Key fingerprint = 4ED9 9907 5BF0 4132 2B46 20D1 C0C6 362D 81B3 FDEB Murray McAllister (Fedora Docs Project / mdious) <murray.mcallister(a)gmail.com&gt; sub 2048g/B04CFA0C 2007-09-19 [expires: 2008-09-18]