i've set up webmail using FreeBSD, MySQL, qmail, and IMP; i've also set up courier and courier-IMAP; set up web cache and authentication servers using squid and NTLM on FreeBSD and Linux; set up SAMBA and Netatalk servers on Linux and FreeBSD; developed simple data entry applications using apache, PHP 4, MySQL, and FreeBSD; developed statistical databases on MySQL. I've set up an UCE (spam) filter gateway using Linux and Postfix; I've managed DNS and DHCP on Linux, FreeBSD, and Windows 2000; Established baseline configurations for enterprise desktops running Windows NT and Windows 2000; configured and administered Microsoft Exchange 5.5