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Full Discussion: /etc/hosts.deny
Top Forums UNIX for Dummies Questions & Answers /etc/hosts.deny Post 302948666 by bakunin on Wednesday 1st of July 2015 10:37:52 AM
Old 07-01-2015
Quote:
Originally Posted by alvinoo
Hi there,

For /etc/hosts.deny was it used to deny access from the internet?
I am not sure what you mean: "/etc/hosts.deny" is part of the TCP wrapper software, which exists for many operating systems. It allows (together with "/etc/hosts.allow") to control and restrict access from certain hosts, not necessarily deny it. For instance one could allow for a certain host to access the local host via ftp but deny access via telnet.

Note that only protocols with an initial handshake can be controlled (which is true for TCP but not for UDP for instance).

I hope this helps.

bakunin
 

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ftphosts(4)                                                        File Formats                                                        ftphosts(4)

NAME
ftphosts - FTP Server individual user host access file SYNOPSIS
/etc/ftpd/ftphosts DESCRIPTION
The ftphosts file is used to allow or deny access to accounts from specified hosts. The following access capabilities are supported: allow username addrglob [addrglob...] Only allow users to login as username from host(s) that match addrglob. deny username addrglob [addrglob...] Do not allow users to login as username from host(s) that match addrglob. A username of * matches all users. A username of anonymous or ftp specifies the anonymous user. addrglob is a regular expression that is matched against hostnames or IP addresses. addrglob may also be in the form address:netmask or address/CIDR, or be the name of a file that starts with a slash ('/') and contains additional address globs. An exclamation mark (`!') placed before the addrglob negates the test. The first allow or deny entry in the ftphosts file that matches a username and host is used. If no entry exists for a username, then access is allowed. Otherwise, a matching allow entry is required to permit access. EXAMPLES
You can use the following ftphosts file to allow anonymous access from any host except those on the class A network 10, with the exception of 10.0.0.* IP addresses, which are allowed access: allow ftp 10.0.0.* deny ftp 10.*.*.* allow ftp * 10.0.0.* can be written as 10.0.0.0:255.255.255.0 or 10.0.0.0/24. FILES
/etc/ftpd/ftphosts ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWftpr | +-----------------------------+-----------------------------+ |Interface Stability |External | +-----------------------------+-----------------------------+ SEE ALSO
in.ftpd(1M), ftpaccess(4), attributes(5) SunOS 5.10 1 May 2003 ftphosts(4)
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