On Saturday 11 May 2002 04:48 am, Enchufa2.com wrote: > What I would like to do is prevent users from changing the browser proxy > configuration at their workstations and then bypass the proxy/cache and > also to prevent unauthorized users to change their e-mail app configuration > and become able to send/receive external e-mail using external e-mail > servers.
This can be done, at least in part, by creating a transparent proxy using squid. The Squid FAQ has details on this - it requires some ipchains rules that redirect any connections to port 80 to the Squid port or something like that. > Ideally, unathorized users would only be able to use the local mail servers > and authorized users would be able to use both internal and external > servers. You could use fetchmail from a particular internal host in order to download the external mail for those users that are allowed to have external mail. Then you could have an internal SMTP and POP3/IMAP mail server handle everything for the outside. Alternately, you can limit access such that only certain workstations are allowed SMTP and POP3/IMAP access to specific mail servers on the outside. _______________________________________________________________ Have big pipes? SourceForge.net is looking for download mirrors. We supply the hardware. You get the recognition. Email Us: [EMAIL PROTECTED] ------------------------------------------------------------------------ leaf-user mailing list: [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/leaf-user SR FAQ: http://leaf-project.org/pub/doc/docmanager/docid_1891.html