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65 lines
2.1 KiB
Plaintext
65 lines
2.1 KiB
Plaintext
#
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# hosts.allow access control file for "tcp wrapped" apps.
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# $FreeBSD$
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#
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# NOTE: The hosts.deny file is not longer used. Instead, put both 'allow'
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# and 'deny' rules in the hosts.allow file.
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# see hosts_options(5) for the format of this file.
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# hosts_access(5) no longer fully applies.
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# This is an example! You will need to modify it for your specific
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# requirements!
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# Start by allowing everything (this prevents the rest of the file
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# from working, so remove it when you need protection).
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# The rules here work on a "First match wins" basis.
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ALL : ALL : allow
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# Wrapping sshd(8) is not normally a good idea, but if you
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# need to do it, here's how
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#sshd : .evil.cracker.example.com : deny
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# Prevent those with no reverse DNS from connecting.
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ALL : PARANOID : RFC931 20 : deny
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# Allow anything from localhost
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ALL : localhost : allow
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ALL : my.machine.example.com : allow
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# Sendmail can help protect you against spammers and relay-rapers
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sendmail : localhost : allow
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sendmail : .nice.guy.example.com : allow
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sendmail : .evil.cracker.example.com : deny
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sendmail : ALL : allow
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# Exim is an alternative to sendmail, available in the ports tree
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exim : localhost : allow
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exim : .nice.guy.example.com : allow
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exim : .evil.cracker.example.com : deny
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exim : ALL : allow
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# Portmapper is used for all RPC services; protect your NFS!
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portmap : localhost : allow
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portmap : .nice.guy.example.com : allow
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portmap : .evil.cracker.example.com : deny
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portmap : ALL : allow
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# Provide a small amount of protection for ftpd
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ftpd : localhost : allow
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ftpd : .nice.guy.example.com : allow
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ftpd : .evil.cracker.example.com : deny
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ftpd : ALL : allow
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# You need to be clever with finger; do _not_ backfinger!! You can easily
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# start a "finger war".
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fingerd : ALL \
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: spawn (echo Finger. | \
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/usr/bin/mail -s "tcpd\: %u@%h[%a] fingered me!" root) & \
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: deny
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# The rest of the daemons are protected. Backfinger and log by email.
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ALL : ALL \
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: severity auth.info : spawn (/usr/bin/finger -l @%h | \
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/usr/bin/mail -s "tcpd\: %u@%h[%a] tried to use %d (denied)" root) & \
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: twist /bin/echo "You are not welcome to use %d from %h."
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