System Administration Guide: Network Services

Chapter 27 Working With Remote Systems (Overview)

This section includes information on working with remote files.

What Is the FTP Server?

The FTP Server is based on wu-ftpd. Originally developed by Washington University in Saint Louis, wu-ftpd is widely used for distribution of bulk data over the Internet and is the preferred standard for large FTP sites. For information on the licensing terms, refer to the materials that are incorporated at /var/sadm/pkg/SUNWftpu/install/copyright.

What Is a Remote System?

For the purpose of this chapter, a remote system is a workstation or server that is connected to the local system with any type of physical network and configured for TCP/IP communication.

On systems running a Solaris release, TCP/IP configuration is established automatically during startup. For more information, see System Administration Guide: IP Services.

Changes to the FTP Service for the Solaris 10 Release

The Solaris 10 release includes several changes to the FTP service. The changes include enhancements to the FTP server, and changes to the ftpcount, ftpwho and ftp commands.

The enhancements to the FTP server improve scalability and transfer logging. These options are covered in Configuration Help for Busy Sites and in the ftpaccess(4) man page. In specific:

In addition, ftpcount and ftpwho now support the -v option, which displays user counts and process information for FTP server classes defined in virtual host ftpaccess files. See the ftpcount(1) and ftpwho(1) man pages for more information.

The FTP client and server now support Kerberos. For more information refer to the ftp(4) man page and to Kerberos User Commands in System Administration Guide: Security Services.

The ftp command has been changed. By default, a Solaris FTP client connected to a Solaris FTP server lists both directories as well as plain files when the ls command is issued to the client. If the FTP server is not running in the Solaris OS, directories may not be listed. To allow for the default Solaris behavior when connecting to non-Solaris FTP servers, the /etc/default/ftp file can be edited appropriately on each Solaris client. To make the change for individual users, the FTP_LS_SENDS_NLST environment variable can be set to yes. For more information see the ftp(4) man page.

The ftpd daemon is managed by the Service Management Facility. Administrative actions on this service, such as enabling, disabling, or restarting, can be performed using the svcadm command. The service's status for all daemons can be queried using the svcs command. For an overview of the Service Management Facility, refer to Chapter 18, Managing Services (Overview), in System Administration Guide: Basic Administration.

What's New for the Solaris 9 FTP Server?

Significant changes were made to the FTP Server in the Solaris 9 release, so this section has been retained for the Solaris 10 release. The FTP Server is compatible with Solaris 8 FTP software, yet offers new capability with improved performance for Solaris 9 users.

Table 27–1 What's New for the Solaris 9 FTP Server



For Information 

User classification by type and location 

Permits you to define a class of users, based on type and address 

How to Define FTP Server Classes

Limits per class 

Controls the number of users from a certain class who are allowed simultaneous login, based on limits that are set in the ftpaccess file

How to Set User Login Limits

System-wide and directory-related messages 

Displays the messages that you specify for particular events 

How to Create Messages to Be Sent to Users

Upload permissions per directory 

Allows you to control uploads to the FTP Server, including file and directory creation and permissions 

How to Control Uploads to the FTP Server

File name filter 

Enables you to specify which characters, in what sequence, are acceptable in the name of an uploaded file 

How to Control Uploads to the FTP Server

Virtual host support 

Permits you to configure the FTP server to support multiple domains on a single machine 

How to Enable Complete Virtual Hosting

Command logging 

Allows logging of commands that are executed by real, guest, and anonymous FTP users 

How to Check the Commands Executed by FTP Users

Transfer logging 

Allows logging of transfers for real, guest, and anonymous FTP users 

ftpaccess(4), xferlog(4), in.ftpd(1M)

As-needed compression and archiving 

Allows as-needed compression and archiving by using conversions that are specified in the ftpconversions file

ftpconversions(4), ftpaccess(4)

The following list shows the Solaris 8 features that are not supported in later releases.