


Net::Config(3p)  Perl Programmers Reference Guide Net::Config(3p)


NAME
       Net::Config - Local configuration data for libnet

SYNOPSYS
           use Net::Config qw(%NetConfig);

DESCRIPTION
       "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

           # .libnetrc
           {
               nntp_hosts => [ "my_preferred_host" ],
               ph_hosts   => [ "my_ph_server" ],
           }
           __END__

METHODS
       "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.

       requires_firewall HOST
           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.

NetConfig VALUES
       nntp_hosts
       snpp_hosts
       pop3_hosts
       smtp_hosts
       ph_hosts
       daytime_hosts
       time_hosts
           Each is a reference to an array of hostnames (in order
           of preference), which should be used for the given
           protocol




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Net::Config(3p)  Perl Programmers Reference Guide Net::Config(3p)


       inet_domain
           Your internet domain name

       ftp_firewall
           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
           "hostname:port" (eg "hostname:99")

       ftp_firewall_type
           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

           0   There is no firewall

           1
                    USER user@remote.host
                    PASS pass

           2
                    USER fwuser
                    PASS fwpass
                    USER user@remote.host
                    PASS pass

           3
                    USER fwuser
                    PASS fwpass
                    SITE remote.site
                    USER user
                    PASS pass

           4
                    USER fwuser
                    PASS fwpass
                    OPEN remote.site
                    USER user
                    PASS pass

           5
                    USER user@fwuser@remote.site
                    PASS pass@fwpass

           6




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Net::Config(3p)  Perl Programmers Reference Guide Net::Config(3p)


                    USER fwuser@remote.site
                    PASS fwpass
                    USER user
                    PASS pass

           7
                    USER user@remote.host
                    PASS pass
                    AUTH fwuser
                    RESP fwpass

       ftp_ext_passive
       ftp_int_passive
           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.

       local_netmask
           A reference to a list of netmask strings in the form
           "134.99.4.0/24".  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

       test_hosts
           If true then "make test" may attempt to connect to
           hosts given in the configuration.

       test_exists
           If true then "Configure" will check each hostname
           given that it exists










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