IT博客汇 | Linux vsftpd：vsftpd[4070]: warning: can’t get client address: Socket operation on non-socket

Linux vsftpd：vsftpd[4070]: warning: can’t get client address: Socket operation on non-socket

Adamhuan发表于 2017-04-28 07:34:12

该错误发生的时候，具体的情况如下：

[root@oracle-cluster-3 iconic-one]# service vsftpd start
Redirecting to /bin/systemctl start  vsftpd.service
Job for vsftpd.service failed. See 'systemctl status vsftpd.service' and 'journalctl -xn' for details.
[root@oracle-cluster-3 iconic-one]#

Linux的系统日志如下：/var/log/messages

Apr 28 15:08:37 oracle-cluster-3 systemd: Starting Vsftpd ftp daemon...
Apr 28 15:08:37 oracle-cluster-3 vsftpd[3782]: warning: can't get client address: Socket operation on non-socket
Apr 28 15:08:37 oracle-cluster-3 systemd: vsftpd.service: control process exited, code=exited status=2
Apr 28 15:08:37 oracle-cluster-3 systemd: Failed to start Vsftpd ftp daemon.
Apr 28 15:08:37 oracle-cluster-3 systemd: Unit vsftpd.service entered failed state.

【journalctl】的日志：

[root@oracle-cluster-3 iconic-one]# journalctl -xn
-- Logs begin at Thu 2017-04-27 10:23:51 CST, end at Fri 2017-04-28 15:08:13 CST. --
Apr 28 15:08:03 oracle-cluster-3 vsftpd[3652]: warning: can't get client address: Socket operation on non-socket
Apr 28 15:08:03 oracle-cluster-3 systemd[1]: vsftpd.service: control process exited, code=exited status=2
Apr 28 15:08:03 oracle-cluster-3 systemd[1]: Failed to start Vsftpd ftp daemon.
-- Subject: Unit vsftpd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit vsftpd.service has failed.
-- 
-- The result is failed.
Apr 28 15:08:03 oracle-cluster-3 systemd[1]: Unit vsftpd.service entered failed state.
Apr 28 15:08:11 oracle-cluster-3 systemd[1]: Stopped Vsftpd ftp daemon.
-- Subject: Unit vsftpd.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit vsftpd.service has finished shutting down.
Apr 28 15:08:13 oracle-cluster-3 systemd[1]: Starting Vsftpd ftp daemon...
-- Subject: Unit vsftpd.service has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit vsftpd.service has begun starting up.
Apr 28 15:08:13 oracle-cluster-3 vsftpd[3695]: warning: can't get client address: Socket operation on non-socket
Apr 28 15:08:13 oracle-cluster-3 systemd[1]: vsftpd.service: control process exited, code=exited status=2
Apr 28 15:08:13 oracle-cluster-3 systemd[1]: Failed to start Vsftpd ftp daemon.
-- Subject: Unit vsftpd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
[root@oracle-cluster-3 iconic-one]#

发生该问题的时候，确认两点：
1. 是否启用了IPv6
2. FTP的监听端口，是否被占用

当前的配置情况：

[root@oracle-cluster-3 iconic-one]# cat /etc/vsftpd/vsftpd.conf | grep '^[^#]'
anonymous_enable=YES
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_std_format=YES
listen=YES
listen_ipv6=YES
pam_service_name=vsftpd
userlist_enable=YES
userlist_deny=NO
tcp_wrappers=YES
[root@oracle-cluster-3 iconic-one]#

1. 将上面的对IPv6的监听设为【NO】
2. 修改默认的监听端口21为801

修改VSFTPD的默认端口。

将配置文件修改为以下状态：

[root@oracle-cluster-3 iconic-one]# cat /etc/vsftpd/vsftpd.conf | grep '^[^#]'
anonymous_enable=YES
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_std_format=YES
listen=YES
listen_ipv6=NO
pam_service_name=vsftpd
userlist_enable=YES
userlist_deny=NO
tcp_wrappers=YES
listen_port=801
[root@oracle-cluster-3 iconic-one]#

如上【listen_port】为端口设定。

然后，重新启动vsftpd服务，就没问题了：

[root@oracle-cluster-3 iconic-one]# service vsftpd start
Redirecting to /bin/systemctl start  vsftpd.service
[root@oracle-cluster-3 iconic-one]# 
[root@oracle-cluster-3 iconic-one]# service vsftpd status
Redirecting to /bin/systemctl status  vsftpd.service
vsftpd.service - Vsftpd ftp daemon
   Loaded: loaded (/usr/lib/systemd/system/vsftpd.service; enabled)
   Active: active (running) since Fri 2017-04-28 15:31:41 CST; 9s ago
  Process: 9320 ExecStart=/usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf (code=exited, status=0/SUCCESS)
 Main PID: 9321 (vsftpd)
   CGroup: /system.slice/vsftpd.service
           └─9321 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf

Apr 28 15:31:41 oracle-cluster-3 systemd[1]: Starting Vsftpd ftp daemon...
Apr 28 15:31:41 oracle-cluster-3 systemd[1]: Started Vsftpd ftp daemon.
[root@oracle-cluster-3 iconic-one]#

查看一下现在的正常情况下的端口使用情况：

[root@oracle-cluster-3 iconic-one]# netstat -tupln | grep ftp
tcp        0      0 0.0.0.0:801             0.0.0.0:*               LISTEN      9321/vsftpd         
tcp6       0      0 :::21                   :::*                    LISTEN      9890/proftpd: (acce 
[root@oracle-cluster-3 iconic-one]# 
[root@oracle-cluster-3 iconic-one]# lsof -i :21
COMMAND  PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
proftpd 9890 daemon    0u  IPv6  47249      0t0  TCP *:21 (LISTEN)
[root@oracle-cluster-3 iconic-one]# 
[root@oracle-cluster-3 iconic-one]# lsof -i :801
COMMAND  PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
vsftpd  9321 root    3u  IPv4 1556599      0t0  TCP *:ftp (LISTEN)
[root@oracle-cluster-3 iconic-one]# 
[root@oracle-cluster-3 iconic-one]#

————————————————
Done。