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i have 2 interface in my server local (192.168.0.1) & internet (Ethernet with real IP). services in the server are proxy, dns, web, mail. using ipchain as firewall. any one can help me to solve these problem -
1. how can i restrict some of my local user only from web browsing, but he will be able to send and receive mail.
2. how can i restrict some of my local user to send external mail but shloud be able to send internally and receive both internal nad external mail, i use sendmail.
Firstly I'd recommend upgrading your kernel as Iptables are now the prefered method of filtering, secondly, just write 2 rules to block incomming packets to your blocked users ip address with a source port of 80 (and 8080 to stop proxys)
2. how can i restrict some of my local user to send external mail but shloud be able to send internally and receive both internal nad external mail, i use sendmail.
Controlled relaying, I guess. Search LQ and Sendmail.org for posts/docs on relaying. After you've read those, adjust your /etc/mail config files, try, test, and post if any errors/questions occur.
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