Date: Sat, 2 Aug 2003 09:55:45 +0100 From: "Schalk Erasmus" <schalk@home.incredible.com.na> To: <freebsd-isp@freebsd.org> Subject: FreeBSD - Secure by DEFAULT ?? Message-ID: <000a01c358d3$dcc94eb0$0265de0a@Fujitsu>
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Hi, I need to know what the implications are to make use of the hosts.allow file on a FreeBSD Production Server (ISP Setup)? The reason I'm asking, is that I've recently decommisioned a Linux SendMail Server to a FreeBSD Exim Server, but with no Firewall (IPTABLES) yet. Besides the fact that it only runs EXIM and Apache, is it necessary to Configure rc.Firewall? or can I only make use of the hosts.allow file? Currently I would only like to allow SSH access from my Home Network, instead of allowing the WORLD. I've seen OpenBSD Servers using hosts.deny and hosts.allow files, but based on the new "Access Control File", it is all merged together in one file: # # hosts.allow access control file for "tcp wrapped" applications. # $FreeBSD: src/etc/hosts.allow,v 1.8.2.7 2002/04/17 19:44:22 dougb Exp $ # # NOTE: The hosts.deny file is deprecated. # Place both 'allow' and 'deny' rules in the hosts.allow file. # See hosts_options(5) for the format of this file. # hosts_access(5) no longer fully applies. # Start by allowing everything (this prevents the rest of the file # from working, so remove it when you need protection). # The rules here work on a "First match wins" basis. ALL : ALL : allow # Wrapping sshd(8) is not normally a good idea, but if you # need to do it, here's how #sshd : .evil.cracker.example.com : deny Should I make the following changes to this file? (I'm afraid I might get kicked out) ALL : ALL : deny sshd : myhomepc.baboon.com : allow What kind of protection does FreeBSD need by Default? Since OpenBSD goes around saying: "SECURE BY DEFAULT" !? Just asking..... Regards Schalk Erasmus
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