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Operating Systems AIX Denying IPaddress for Multiple Failed Login Attempts Post 302070285 by metzgerh on Monday 3rd of April 2006 06:27:29 PM
Old 04-03-2006
Denying IPaddress for Multiple Failed Login Attempts

Hi. I would like to be able to deny IP address for too many failed login attemps (either from ssh, sftp, ftp, etc). The system I wish this to work on is an AIX 5.1 system. I'm new to AIX but I'm a linux user. There is a program for linux called fail2ban which reads from the log files and see if there are failed login attemps, and if there are enough (or it meets the conditions you specify) than it will do an action, such as denying all traffic from that IP. In linux this is done by adding the entry to the iptables, but I typed iptables in AIX and It (at least on the server we use) said it did not have such a command. So, does anyone know any program on AIX in which we can see where remote login attempts come from and if they fail many times in a short peorid of time we can ban that IP and drop an email to the sys admin telling them that someone was banned?
 

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netrc(4)						     Kernel Interfaces Manual							  netrc(4)

NAME
netrc, .netrc - Specifies automatic login information for ftp SYNOPSIS
$HOME/.netrc DESCRIPTION
The .netrc file contains the information used by the automatic login (autologin) feature of the ftp command. It is a hidden file in your home directory and must be owned by the user logging in, or by the root user. If the .netrc file contains a login password, the file's permissions must be set to 600 (read and write by owner only). The .netrc file can contain the following entries (separated by spaces, tabs, or newlines): Where host is the name of a remote host. This entry begins the definition of the autologin process for the specified host. All following entries up to the next machine entry or the end of the file apply to that host. This is the same as machine, except that default matches any name. There can be only one default token, and it must appear after all machine tokens. This is normally used as follows: default login anonymous password user@site The preceding command line gives the user automatic anonymous ftp login to machines not specified in .netrc. This can be overriden by using the -n flag to disable autologin. Where user is the username to use at the remote host. If this entry is found, the autologin process initiates a login using the specified name. If this entry is missing, the autologin process fails. Where password is the login password to be used. The autologin process supplies this password to the remote server. A login password must be established at the remote host and that pass- word must be entered in this file, or the autologin process fails and you are prompted for the login password. Where password is the account password to be used. If this entry is found and an account password is required at the remote host, the autologin process supplies the password to the remote server. If the remote host requires an account password but this entry is missing, the autologin process prompts for the account password. Where macro is the name of an ftp subcommand macro. The macro definition starts on the following line and is defined to contain all of the following ftp subcommands up to the next blank line. If the macro is named init, ftp executes the macro upon successful completion of the autologin process. FILES
Contains automatic login information. RELATED INFORMATION
Commands: ftp(1). delim off netrc(4)
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