Proftpd:虚拟用户通过SFTP访问，并配置ssh密钥

Question

我尝试将proftpd配置为与SFTP一起使用并与虚拟用户一起使用，但是在尝试了几种方法后，它不适用于虚拟用户。仅适用于系统用户

与下面的问题相关的一些配置，这里完整的proftpd.conf

AuthUserFile /etc/proftpd/passwd.vhosts
<IfModule mod_tls.c>
    TLSEngine on
    TLSRequired on
    TLSRSACertificateFile /etc/ftpd-rsa.pem
    TLSRSACertificateKeyFile /etc/ftpd-rsa-key.pem
    TLSVerifyClient off
    TLSCipherSuite ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
    TLSOptions NoSessionReuseRequired
    TLSProtocol TLSv1 TLSv1.1 TLSv1.2
</IfModule>
SFTPEngine         on
SFTPAuthMethods         publickey
SFTPAuthorizedUserKeys  file:/etc/proftpd/sftp.passwd.keys/%u
SFTPLog                 /var/log/proftpd/sftp.log
TransferLog             /var/log/proftpd/sftp-xferlog

为了测试，我创建了一个虚拟用户 castrislegio，与 castris 系统用户相关联

castris:PASSWORD_HASH:1004:1004::/home/castris:/usr/libexec/openssh/sftp-server
castrislegio+castris.com:PASSWORD_HASH2:1004:1004:castris:/home/castris/user2:/bin/ftpsh
[e-mail]:PASSWORD_HASH2:1004:1004:castris:/home/castris/user2:/bin/ftpsh

也试试

castris:PASSWORD_HASH:1004:1004::/home/castris:/usr/libexec/openssh/sftp-server
castrislegio+castris.com:PASSWORD_HASH2:1004:1004:castris:/home/castris/user2:/usr/libexec/openssh/sftp-server
[e-mail]:PASSWORD_HASH2:1004:1004:castris:/home/castris/user2:/usr/libexec/openssh/sftp-server

但它不起作用。

 67449929  0 drwx------.   2 root proftpd    51 May 23 12:19 sftp.passwd.keys
 ...
 67449644 4 -rw-rw----. 1 root proftpd 1024 May 23 14:04 castris
 70159270 4 -rw-rw----. 1 root proftpd  512 May 23 14:03 [e-mail]
 70153716 4 -rw-rw----. 1 root proftpd 1024 May 23 14:03 castrislegio+castris.com

我用这个作为放置键

ssh-keygen -e -f .ssh/id_rsa.pub >> /etc/proftpd/sftp.passwd.keys/castris

当我尝试访问时

sftp -v -P 24 -i .ssh/id_rsa castrislegio+castris.com@localhost
OpenSSH_6.6.1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug1: Connecting to localhost [127.0.0.1] port 24.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file .ssh/id_rsa type 1
debug1: identity file .ssh/id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1
debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr [e-mail] none
debug1: kex: client->server aes128-ctr [e-mail] none
debug1: kex: [e-mail] need=16 dh_need=16
debug1: kex: [e-mail] need=16 dh_need=16
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 75:87:c9:ef:e7:b1:ae:47:17:0b:e6:8c:e4:6c:2b:7d
debug1: Host '[localhost]:24' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/known_hosts:2
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:0)
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:0)
debug1: Next authentication method: publickey
debug1: Offering RSA public key: .ssh/id_rsa
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: No more authentication methods to try.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
Couldn't read packet: Connection reset by peer

我对这个问题很迷茫。怎么了？

Answer 1

debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1

您没有连接到Proftpd，而是连接到OpenSSH。如果未在 Proftpd 配置中指定Port，它将默认为端口 22(而不是您尝试使用 sftp 命令连接的端口 22(。

因此，您需要在sftp命令或配置中使用不同的端口。