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How to analyze the Linux system Vsftpd fault solutions, many novices are not very clear, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

Vs in the VSFTPd server means "Very secure". As can be seen from the name, the writers of the software pay great attention to its security. According to the official website, a linux VSFTPd server can support up to 1500 concurrent users. 2.6TB data can be saved 24 hours a day. Before you explain how to troubleshoot Vsftpd servers, understand the file structure of linux VSFTPd servers:

Profile name feature description

The main program of / usr/sbin/VSFTPd VSFTPd

/ etc/rc.d/init.d/VSFTPd startup script

/ etc/VSFTPd/VSFTPd.conf main configuration file

/ etc/pam.d/VSFTPd PAM certification file

/ etc/VSFTPd.ftpusers forbids the use of VSFTPd user list files

/ etc/VSFTPd.user_list prohibits or allows the use of VSFTPd user list files

/ var/ftp anonymous user home directory

/ var/ftp/pub download directory for anonymous users

Log file for / etc/logrotate.d/VSFTPd.log VSFTPd

In addition, there are some documentation and manual files. Understanding log files

Understanding log files is important for troubleshooting, and detailed setup methods are described here. VSFTPd options related to log:

VSFTPd_log_file

Xferlog_enable

Xferlog_std_format

Xferlog_file

Dual_log_enable

Syslog_enable

Log_ftp_protocol

No_log_lock

Before we introduce troubleshooting the Vsftpd server, let's take a look at the parameters for logging in vsftp.

Xferlog_enable=yes/no / / whether the xferlog log format is enabled

Xferlog_std_format=yes/no / / whether to log in a standard format

Location of xferlog_file=/path/to/logfile / / xferlog log file, default is / var/log/xferlog

The above parameters set the format for recording xferlog logs. This is the log format of the early Wu-ftpd service, which records uploads and downloads. VSFTPd also has a proprietary log format, which is set with the following parameters:

Dual_log_enable=yes/no / / whether to use VSFTPd's own logging method

Log_ftp_protocol=yes/no / / whether to log all ftp command logs VSFTPd_log_file=/path/to/logfile / / specify the location of the VSFTPd log file. The default value of / var/log/VSFTPd.log,xferlog_enable is no (the configuration file template provided by VSFTPd changed its value to yes), and the default value of dual_log_enable is no, that is, VSFTPd does not log by default. We can also write log information to Syslog / var/log/messages, using the following parameters:

Syslog_enable=yes/no

Here is the contents of an xferlog log file:

Thu Mar 4 08:12:30 2008 1 202.114.40.242 37 / incoming/index.html a _ o a guest @ my.net ftp 0 * c

Record data parameter description

Thu Mar 4 08:12:30 2008 current server local time, format: "DDD MMM dd hh:mm:ss YYYY"

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