再投稿　突然、FTPにログイン出来なくなる

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再投稿　突然、FTPにログイン出来なくなる

????????? 2007/07/19 09:49
????????? かときち <masao@katou.sc>

　お世話になります。　色々と検索して調べてみましたが、どうしてもわからないので、再度質問させて頂きます。 [症状] 　今までFTPにログイン出来ていたのに、突然ログイン出来なくなりました。　FFFTPでは530エラー（「正しいパスワードを入れてください」）と出ます。 #ftp localhostとすると、 [root@f7server ~]# ftp localhost Connected to localhost (127.0.0.1). 500 OOPS: vsftpd: cannot locate user specified in 'chown_username':whoever ftp> 　と表示されます。 [FTPサーバの種類] 　vsftpd [FTPサーバとの接続方法] 　IPアドレス直接指定 [getenforceの値] 　Disabled [ファイアーウォール] 　切っています。 [Fedoraのバージョン] 　Fedora7 　以上です。　何故急に接続できなくなるのか、全くわかりません。　どうぞ宜しくお願い致します。

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Re: 再投稿　突然、FTPにログイン出来なくなる ( No.1 )

????????? 2007/07/19 09:50
????????? かときち <masao@katou.sc>

[vsftpd.confの内容] # Example config file /etc/vsftpd/vsftpd.conf # # The default compiled in settings are fairly paranoid. This sample file # loosens things up a bit, to make the ftp daemon more usable. # Please see vsftpd.conf.5 for all compiled in defaults. # # READ THIS: This example file is NOT an exhaustive list of vsftpd options. # Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's # capabilities. # # Allow anonymous FTP? (Beware - allowed by default if you comment this out). anonymous_enable=NO # # Uncomment this to allow local users to log in. local_enable=YES # # Uncomment this to enable any form of FTP write command. write_enable=YES # # Default umask for local users is 077. You may wish to change this to 022, # if your users expect that (022 is used by most other ftpd's) local_umask=022 # # Uncomment this to allow the anonymous FTP user to upload files. This only # has an effect if the above global write enable is activated. Also, you will # obviously need to create a directory writable by the FTP user. #anon_upload_enable=YES # # Uncomment this if you want the anonymous FTP user to be able to create # new directories. #anon_mkdir_write_enable=YES # # Activate directory messages - messages given to remote users when they # go into a certain directory. dirmessage_enable=YES # # Activate logging of uploads/downloads. xferlog_enable=YES # # Make sure PORT transfer connections originate from port 20 (ftp-data). connect_from_port_20=YES # # If you want, you can arrange for uploaded anonymous files to be owned by # a different user. Note! Using "root" for uploaded files is not # recommended! chown_uploads=YES chown_username=whoever # # You may override where the log file goes if you like. The default is shown # below. #xferlog_file=/var/log/vsftpd.log # # If you want, you can have your log file in standard ftpd xferlog format xferlog_std_format=YES # # You may change the default value for timing out an idle session. idle_session_timeout=600 # # You may change the default value for timing out a data connection. data_connection_timeout=120 # # It is recommended that you define on your system a unique user which the # ftp server can use as a totally isolated and unprivileged user. #nopriv_user=ftpsecure # # Enable this and the server will recognise asynchronous ABOR requests. Not # recommended for security (the code is non-trivial). Not enabling it, # however, may confuse older FTP clients. #async_abor_enable=YES # # By default the server will pretend to allow ASCII mode but in fact ignore # the request. Turn on the below options to have the server actually do ASCII # mangling on files when in ASCII mode. # Beware that on some FTP servers, ASCII support allows a denial of service # attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd # predicted this attack and has always been safe, reporting the size of the # raw file. # ASCII mangling is a horrible feature of the protocol. ascii_upload_enable=YES ascii_download_enable=YES # # You may fully customise the login banner string: #ftpd_banner=Welcome to f7server service. # # You may specify a file of disallowed anonymous e-mail addresses. Apparently # useful for combatting certain DoS attacks. #deny_email_enable=YES # (default follows) #banned_email_file=/etc/vsftpd/banned_emails # # You may specify an explicit list of local users to chroot() to their home # directory. If chroot_local_user is YES, then this list becomes a list of # users to NOT chroot(). chroot_list_enable=YES # (default follows) chroot_list_file=/etc/vsftpd/chroot_list # # You may activate the "-R" option to the builtin ls. This is disabled by # default to avoid remote users being able to cause excessive I/O on large # sites. However, some broken FTP clients such as "ncftp" and "mirror" assume # the presence of the "-R" option, so there is a strong case for enabling it. ls_recurse_enable=YES # # When "listen" directive is enabled, vsftpd runs in standalone mode and # listens on IPv4 sockets. This directive cannot be used in conjunction # with the listen_ipv6 directive. listen=YES # # This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6 # sockets, you must run two copies of vsftpd whith two configuration files. # Make sure, that one of the listen options is commented !! #listen_ipv6=YES pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES use_localtime=YES pasv_promiscuous=YES pasv_min_port=50000 pasv_max_port=50030 　宜しくお願い致します。

Re: 再投稿　突然、FTPにログイン出来なくなる ( No.2 )

????????? 2007/07/19 13:09
????????? 機動戦車ガンタンク

ひょっとしてですけど、chroot_listにホームパスより上の階層にアクセスできないユーザーを指定していないとかはないですか？

Re: 再投稿　突然、FTPにログイン出来なくなる ( No.3 )

????????? 2007/07/19 15:25
????????? かときち <masao@katou.sc>

　レスして頂きありがとうございます。　chroot_listには、上の階層にアクセスさせないユーザーを書いてあります。（ftpmanと言う適当なものです）　まだ他に何か見落としているものは有るでしょうか。　御教示頂ければ幸いです。　宜しくお願い致します。

Re: 再投稿　突然、FTPにログイン出来なくなる ( No.4 )

????????? 2007/07/19 16:29
????????? かときち <masao@katou.sc>

　vsftpd.confの訂正です。 # If you want, you can arrange for uploaded anonymous files to be owned by # a different user. Note! Using "root" for uploaded files is not # recommended! #chown_uploads=YES #chown_username=whoever 　上記のように設定しています。

Re: 再投稿　突然、FTPにログイン出来なくなる ( No.5 )

????????? 2007/07/19 16:59
????????? かときち <masao@katou.sc>

その他の設定です。 [/etc/hosts.allow] # hosts.allow　 This file describes the names of the hosts which are #　　　　　　　 allowed to use the local INET services, as decided #　　　　　　　 by the '/usr/sbin/tcpd' server. # ALL : ALL [/etc/hosts.deny] # hosts.deny　　This file describes the names of the hosts which are #　　　　　　　 *not* allowed to use the local INET services, as decided #　　　　　　　 by the '/usr/sbin/tcpd' server. # # The portmap line is redundant, but it is left to remind you that # the new secure portmap uses hosts.deny and hosts.allow.　In particular # you should know that NFS uses portmap! [/etc/vsftpd/chroot_list] ftpman [/etc/vsftpd/user_list] # vsftpd userlist # If userlist_deny=NO, only allow users in this file # If userlist_deny=YES (default), never allow users in this file, and # do not even prompt for a password. # Note that the default vsftpd pam config also checks /etc/vsftpd/ftpusers # for users that are denied. bin daemon adm lp sync shutdown halt mail news uucp operator games nobody 以上です。

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Re: 再投稿　突然、FTPにログイン出来なくなる ( No.1 )
????????? 2007/07/19 09:50 ????????? かときち <masao@katou.sc> [vsftpd.confの内容] # Example config file /etc/vsftpd/vsftpd.conf # # The default compiled in settings are fairly paranoid. This sample file # loosens things up a bit, to make the ftp daemon more usable. # Please see vsftpd.conf.5 for all compiled in defaults. # # READ THIS: This example file is NOT an exhaustive list of vsftpd options. # Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's # capabilities. # # Allow anonymous FTP? (Beware - allowed by default if you comment this out). anonymous_enable=NO # # Uncomment this to allow local users to log in. local_enable=YES # # Uncomment this to enable any form of FTP write command. write_enable=YES # # Default umask for local users is 077. You may wish to change this to 022, # if your users expect that (022 is used by most other ftpd's) local_umask=022 # # Uncomment this to allow the anonymous FTP user to upload files. This only # has an effect if the above global write enable is activated. Also, you will # obviously need to create a directory writable by the FTP user. #anon_upload_enable=YES # # Uncomment this if you want the anonymous FTP user to be able to create # new directories. #anon_mkdir_write_enable=YES # # Activate directory messages - messages given to remote users when they # go into a certain directory. dirmessage_enable=YES # # Activate logging of uploads/downloads. xferlog_enable=YES # # Make sure PORT transfer connections originate from port 20 (ftp-data). connect_from_port_20=YES # # If you want, you can arrange for uploaded anonymous files to be owned by # a different user. Note! Using "root" for uploaded files is not # recommended! chown_uploads=YES chown_username=whoever # # You may override where the log file goes if you like. The default is shown # below. #xferlog_file=/var/log/vsftpd.log # # If you want, you can have your log file in standard ftpd xferlog format xferlog_std_format=YES # # You may change the default value for timing out an idle session. idle_session_timeout=600 # # You may change the default value for timing out a data connection. data_connection_timeout=120 # # It is recommended that you define on your system a unique user which the # ftp server can use as a totally isolated and unprivileged user. #nopriv_user=ftpsecure # # Enable this and the server will recognise asynchronous ABOR requests. Not # recommended for security (the code is non-trivial). Not enabling it, # however, may confuse older FTP clients. #async_abor_enable=YES # # By default the server will pretend to allow ASCII mode but in fact ignore # the request. Turn on the below options to have the server actually do ASCII # mangling on files when in ASCII mode. # Beware that on some FTP servers, ASCII support allows a denial of service # attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd # predicted this attack and has always been safe, reporting the size of the # raw file. # ASCII mangling is a horrible feature of the protocol. ascii_upload_enable=YES ascii_download_enable=YES # # You may fully customise the login banner string: #ftpd_banner=Welcome to f7server service. # # You may specify a file of disallowed anonymous e-mail addresses. Apparently # useful for combatting certain DoS attacks. #deny_email_enable=YES # (default follows) #banned_email_file=/etc/vsftpd/banned_emails # # You may specify an explicit list of local users to chroot() to their home # directory. If chroot_local_user is YES, then this list becomes a list of # users to NOT chroot(). chroot_list_enable=YES # (default follows) chroot_list_file=/etc/vsftpd/chroot_list # # You may activate the "-R" option to the builtin ls. This is disabled by # default to avoid remote users being able to cause excessive I/O on large # sites. However, some broken FTP clients such as "ncftp" and "mirror" assume # the presence of the "-R" option, so there is a strong case for enabling it. ls_recurse_enable=YES # # When "listen" directive is enabled, vsftpd runs in standalone mode and # listens on IPv4 sockets. This directive cannot be used in conjunction # with the listen_ipv6 directive. listen=YES # # This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6 # sockets, you must run two copies of vsftpd whith two configuration files. # Make sure, that one of the listen options is commented !! #listen_ipv6=YES pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES use_localtime=YES pasv_promiscuous=YES pasv_min_port=50000 pasv_max_port=50030 　宜しくお願い致します。
Re: 再投稿　突然、FTPにログイン出来なくなる ( No.2 )
????????? 2007/07/19 13:09 ????????? 機動戦車ガンタンク `ひょっとしてですけど、chroot_listにホームパスより上の階層にアクセスできないユーザーを指定していないとかはないですか？`
Re: 再投稿　突然、FTPにログイン出来なくなる ( No.3 )
????????? 2007/07/19 15:25 ????????? かときち <masao@katou.sc> 　`レスして頂きありがとうございます。　chroot_listには、上の階層にアクセスさせないユーザーを書いてあります。（ftpmanと言う適当なものです）　まだ他に何か見落としているものは有るでしょうか。　御教示頂ければ幸いです。　宜しくお願い致します。`
Re: 再投稿　突然、FTPにログイン出来なくなる ( No.4 )
????????? 2007/07/19 16:29 ????????? かときち <masao@katou.sc> 　`vsftpd.confの訂正です。 # If you want, you can arrange for uploaded anonymous files to be owned by # a different user. Note! Using "root" for uploaded files is not # recommended! #chown_uploads=YES #chown_username=whoever 　上記のように設定しています。`
Re: 再投稿　突然、FTPにログイン出来なくなる ( No.5 )
????????? 2007/07/19 16:59 ????????? かときち <masao@katou.sc> その他の設定です。 [/etc/hosts.allow] # hosts.allow　 This file describes the names of the hosts which are #　　　　　　　 allowed to use the local INET services, as decided #　　　　　　　 by the '/usr/sbin/tcpd' server. # ALL : ALL [/etc/hosts.deny] # hosts.deny　　This file describes the names of the hosts which are #　　　　　　　 not allowed to use the local INET services, as decided #　　　　　　　 by the '/usr/sbin/tcpd' server. # # The portmap line is redundant, but it is left to remind you that # the new secure portmap uses hosts.deny and hosts.allow.　In particular # you should know that NFS uses portmap! [/etc/vsftpd/chroot_list] ftpman [/etc/vsftpd/user_list] # vsftpd userlist # If userlist_deny=NO, only allow users in this file # If userlist_deny=YES (default), never allow users in this file, and # do not even prompt for a password. # Note that the default vsftpd pam config also checks /etc/vsftpd/ftpusers # for users that are denied. bin daemon adm lp sync shutdown halt mail news uucp operator games nobody 以上です。