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Operating Systems Linux Can Telnet in Linux 8.0 be restricted for users Post 61909 by zazzybob on Wednesday 9th of February 2005 04:57:55 PM
Old 02-09-2005
If you can, err away from using telnet altogether and use ssh instead. Then, if you have a look at the manual page for the sshd_config file (the file itself is usually /etc/sshd_config), you'll find that you can allow/deny users, groups, etc access to sshd.

Telnet is inherently insecure and should be avoided if at all possible.

Cheers
ZB
 

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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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