今天测试vsftp虚拟账户配置，到现在为止还没成功，问题是虚拟账户无法登陆，
查看日志 more /var/log/secure
1Mar 23 14:42:26 localhost vsftpd: pam_unix(vsftpd:auth): authentication failure; logname= uid=0 euid=0 tty=ftp ruser=test rhost=192.168.14.24 2Mar 23 14:42:26 localhost vsftpd: pam_succeed_if(vsftpd:auth): error retrieving information about user test 3Mar 23 14:44:29 localhost vsftpd: PAM unable to dlopen(/lib/security/pam_userdb.so) 4Mar 23 14:44:29 localhost vsftpd: PAM [error: /lib/security/pam_userdb.so: wrong ELF class: ELFCLASS32] 5Mar 23 14:44:29 localhost vsftpd: PAM adding faulty module: /lib/security/pam_userdb.so 6Mar 23 14:44:29 localhost vsftpd: pam_listfile(vsftpd:auth): Couldn't open /etc/vsftpd/wdftp 7Mar 23 14:44:29 localhost vsftpd: pam_unix(vsftpd:auth): check pass; user unknown 8Mar 23 14:44:29 localhost vsftpd: pam_unix(vsftpd:auth): authentication failure; logname= uid=0 euid=0 tty=ftp ruser=test rhost=192.168.14.24 9Mar 23 14:44:29 localhost vsftpd: pam_succeed_if(vsftpd:auth): error retrieving information about user test
下面将我的配置过程写出来，望大家能帮我指正一下,也希望能给后来者一个提示,如有不详细处请回复：
1.环境VirtualBoax **Centos5.5（64位）,**vsftp2.0.5
2.基础软件安装
yum -y install vsftpd*
yum -y install pam*
yum -y install db4*
3.新建useradd wdftp -s /sbin/nologin
4.新建虚拟账户用户文件
vi /etc/vsftpd/vsftpd_login
1test 2123456 3hello 4123321ab
5.生成虚拟账户DB文件
db_load -T -t hash -f /etc/vsftpd/vsftpd_login /etc/vsftpd/vsftpd_login.db
6.新建虚拟账户目录/etc/vsftpd/vsftpd_user_conf，并将第4步中用户一一创建一个文件，其中test用户的配置如下，其它账户一样
1local_root=/var/ftp/pub/ 2#anonymous_enable=NO 3write_enable=YES 4#local_umask=022 5#anon_upload_enable=NO 6#anon_mkdir_write_enable=NO 7#idle_session_timeout=600 8#data_connection_timeout=120 9#max_clients=10 10#max_per_ip=5 11#local_max_rate=50000
7.修改vi /etc/pam.d/vsftpd
1#%PAM-1.0 2auth sufficient /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login 3account sufficient /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login 4 5session optional pam_keyinit.so force revoke 6auth required pam_listfile.so item=user sense=deny file=/etc/vsftpd/wdftp onerr=succeed 7auth required pam_shells.so 8auth include system-auth 9account include system-auth 10session include system-auth 11session required pam_loginuid.so
8.vsftpd.conf 配置
1# The default compiled in settings are fairly paranoid. This sample file 2# loosens things up a bit, to make the ftp daemon more usable. 3# Please see vsftpd.conf.5 for all compiled in defaults. 4# 5# READ THIS: This example file is NOT an exhaustive list of vsftpd options. 6# Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's 7# capabilities. 8# 9# Allow anonymous FTP? (Beware - allowed by default if you comment this out). 10anonymous_enable=NO 11# 12# Uncomment this to allow local users to log in. 13local_enable=YES 14# 15# Uncomment this to enable any form of FTP write command. 16write_enable=YES 17# 18# Default umask for local users is 077. You may wish to change this to 022, 19# if your users expect that (022 is used by most other ftpd's) 20local_umask=022 21# 22# Uncomment this to allow the anonymous FTP user to upload files. This only 23# has an effect if the above global write enable is activated. Also, you will 24# obviously need to create a directory writable by the FTP user. 25anon_upload_enable=NO 26# 27# Uncomment this if you want the anonymous FTP user to be able to create 28# new directories. 29anon_mkdir_write_enable=NO 30# 31# Activate directory messages - messages given to remote users when they 32# go into a certain directory. 33dirmessage_enable=YES 34# 35# Activate logging of uploads/downloads. 36xferlog_enable=YES 37# 38# Make sure PORT transfer connections originate from port 20 (ftp-data). 39connect_from_port_20=YES 40# 41# If you want, you can arrange for uploaded anonymous files to be owned by 42# a different user. Note! Using "root" for uploaded files is not 43# recommended! 44#chown_uploads=YES 45#chown_username=whoever 46# 47# You may override where the log file goes if you like. The default is shown 48# below. 49xferlog_file=/var/log/vsftpd.log 50# 51# If you want, you can have your log file in standard ftpd xferlog format 52xferlog_std_format=YES 53# 54# You may change the default value for timing out an idle session. 55#idle_session_timeout=600 56# 57# You may change the default value for timing out a data connection. 58#data_connection_timeout=120 59# 60# It is recommended that you define on your system a unique user which the 61# ftp server can use as a totally isolated and unprivileged user. 62nopriv_user=vsftpd 63# 64# Enable this and the server will recognise asynchronous ABOR requests. Not 65# recommended for security (the code is non-trivial). Not enabling it, 66# however, may confuse older FTP clients. 67async_abor_enable=YES 68# 69# By default the server will pretend to allow ASCII mode but in fact ignore 70# the request. Turn on the below options to have the server actually do ASCII 71# mangling on files when in ASCII mode. 72# Beware that on some FTP servers, ASCII support allows a denial of service 73# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd 74# predicted this attack and has always been safe, reporting the size of the 75# raw file. 76# ASCII mangling is a horrible feature of the protocol. 77ascii_upload_enable=YES 78ascii_download_enable=YES 79# 80# You may fully customise the login banner string: 81ftpd_banner=Welcome to FTP service. 82# 83# You may specify a file of disallowed anonymous e-mail addresses. Apparently 84# useful for combatting certain DoS attacks. 85#deny_email_enable=YES 86# (default follows) 87#banned_email_file=/etc/vsftpd/banned_emails 88# 89# You may specify an explicit list of local users to chroot() to their home 90# directory. If chroot_local_user is YES, then this list becomes a list of 91# users to NOT chroot(). 92#chroot_list_enable=YES 93# (default follows) 94#chroot_list_file=/etc/vsftpd/chroot_list 95# 96# You may activate the "-R" option to the builtin ls. This is disabled by 97# default to avoid remote users being able to cause excessive I/O on large 98# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume 99# the presence of the "-R" option, so there is a strong case for enabling it. 100#ls_recurse_enable=YES 101# 102# When "listen" directive is enabled, vsftpd runs in standalone mode and 103# listens on IPv4 sockets. This directive cannot be used in conjunction 104# with the listen_ipv6 directive. 105listen=YES 106# 107# This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6 108# sockets, you must run two copies of vsftpd whith two configuration files. 109# Make sure, that one of the listen options is commented !! 110#listen_ipv6=YES 111chroot_local_user=YES 112pam_service_name=vsftpd 113userlist_enable=YES 114tcp_wrappers=YES 115guest_enable=YES 116guest_username=wdftp 117virtual_use_local_privs=YES 118user_config_dir=/etc/vsftpd/vsftpd_user_conf
9.重启service vsftpd restart
我重新将虚拟机中的linux删掉重新装了一篇，然后重新配置vsftp，按上面的步骤成功了！所以流程上是没有问题的，希望能给各位一点参考。