Net::Config - Local configuration data for libnet
use Net::Config qw(%NetConfig);
Net::Config holds configuration data for the modules in the libnet distribution. During installation you will be asked for these values.
The configuration data is held globally in a file in the perl installation tree, but a user may override any of these values by providing their own. This can be done by having a
.libnetrc file in their home directory. This file should return a reference to a HASH containing the keys described below. For example
nntp_hosts => [ "my_preferred_host" ],
ph_hosts => [ "my_ph_server" ],
Net::Config defines the following methods. They are methods as they are invoked as class methods. This is because
Net::Config inherits from
Net::LocalCfg so you can override these methods if you want.
Attempts to determine if a given host is outside your firewall. Possible return values are.
-1 Cannot lookup hostname
0 Host is inside firewall (or there is no ftp_firewall entry)
1 Host is outside the firewall
This is done by using hostname lookup and the
local_netmask entry in the configuration data.
Each is a reference to an array of hostnames (in order of preference), which should be used for the given protocol
Your internet domain name
If you have an FTP proxy firewall (NOT an HTTP or SOCKS firewall) then this value should be set to the firewall hostname. If your firewall does not listen to port 21, then this value should be set to
There are many different ftp firewall products available. But unfortunately there is no standard for how to traverse a firewall. The list below shows the sequence of commands that Net::FTP will use
user Username for remote host
pass Password for remote host
fwuser Username for firewall
fwpass Password for firewall
remote.host The hostname of the remote ftp server
There is no firewall
FTP servers can work in passive or active mode. Active mode is when you want to transfer data you have to tell the server the address and port to connect to. Passive mode is when the server provide the address and port and you establish the connection.
With some firewalls active mode does not work as the server cannot connect to your machine (because you are behind a firewall) and the firewall does not re-write the command. In this case you should set
ftp_ext_passive to a true value.
Some servers are configured to only work in passive mode. If you have one of these you can force
Net::FTP to always transfer in passive mode; when not going via a firewall, by setting
ftp_int_passive to a true value.
A reference to a list of netmask strings in the form
"220.127.116.11/24". These are used by the
requires_firewall function to determine if a given host is inside or outside your firewall.
The following entries are used during installation & testing on the libnet package
If true then
make test may attempt to connect to hosts given in the configuration.
If true then
Configure will check each hostname given that it exists
Graham Barr <email@example.com>
Steve Hay <firstname.lastname@example.org> is now maintaining libnet as of version 1.22_02
Versions up to 1.11 Copyright (c) 1998-2011 Graham Barr. All rights reserved. Changes in Version 1.11_01 onwards Copyright (C) 2013-2014 Steve Hay. All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself, i.e. under the terms of either the GNU General Public License or the Artistic License, as specified in the LICENCE file.