RewriteEngine On
RewriteCond %{REMOTE_ADDR} !^164\.107
RewriteCond %{REMOTE_ADDR} !^140\.254
RewriteCond %{REMOTE_ADDR} !^128\.146
RewriteCond %{REMOTE_ADDR} !^192\.68\.143 
RewriteCond %{REMOTE_ADDR} !^192\.12\.205 
RewriteCond %{REMOTE_ADDR} !^67\.39\.90 
RewriteCond %{REMOTE_ADDR} !^75\.12\.69
RewriteRule (.*) http://proxy.lib.ohio-state.edu/login?url=http://%{SERVER_NAME}%{REQUEST_URI} [R,L]