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Date:      Fri, 18 Dec 2015 17:25:58 -0500
From:      mike tancsa <mike@sentex.net>
To:        Ernie Luzar <luzar722@gmail.com>
Cc:        "freebsd-questions" <freebsd-questions@freebsd.org>
Subject:   Re: sftp, syslog level, chrooted users in a jail
Message-ID:  <151b73318f0.2765.e68d32c7521a042b3773fe36a0156dc7@sentex.net>
In-Reply-To: <56748142.4030907@gmail.com>
References:  <5671882E.3040509@sentex.net> <56748142.4030907@gmail.com>

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Hi, thanks for the reply. Yes, all the users (a few hundred) are all in one 
jail. However the users must be chrooted into their own directories for 
security reasons. Hence, I cannot remove the chroot option and am left with 
the issue of logging



On December 18, 2015 4:57:11 PM Ernie Luzar <luzar722@gmail.com> wrote:

> Mike Tancsa wrote:
>> I am trying to increase the verbosity of sftp's syslog, but am running
>> into a problem because the users are chrooted and ssh is running in a jail.
>>
>> My setup -- simple qjail with defaults
>>
>> I have inside, the user
>>
>> test1sftp:*:1002:1002:User &:/home/test1:/bin/false
>>
>> and in /etc/ssh/sshd_config I have
>>
>> Match user *
>>    ChrootDirectory %h
>>    ForceCommand internal-sftp -l debug1
>>    AllowTcpForwarding no
>>    PermitTunnel no
>>    X11Forwarding no
>>
>> /home/test1sftp
>>
>> # ls -l /home/test1sftp
>> total 27
>> drwxr-xr-x    5 root       wheel      uarch   5 Dec 16 10:04 .
>> drwxrwxr-x    2 root       wheel      uarch   4 Dec 16 10:37 dev
>> drwxr-xr-x    3 test1sftp  test1sftp  uarch   6 Dec 16 10:37 uploadhere
>>
>>
>> In the dev directory, if I make
>> # ls -l /home/test1sftp/dev/
>> total 2
>> drwxrwxr-x  2 root  wheel  uarch 4 Dec 16 10:37 .
>> drwxr-xr-x  5 root  wheel  uarch 5 Dec 16 10:04 ..
>> srw-rw-rw-  2 root  wheel  uarch 0 Dec 16 10:05 log
>> srw-------  2 root  wheel  uarch 0 Dec 16 10:05 logpriv
>>
>>
>>
>> ln /var/run/logpriv logpriv
>> ln /var/run/log log
>>
>> I can get it to work.
>>
>>
>> 10:44:58  sshd
>> 10:44:58  sshd: Accepted publickey for test1sftp from xxxx port 30534
>> ssh2: RSA 51:2e:....
>> 10:44:58  sshd: User child is on pid 83522
>> 10:44:58  sshd: Changed root directory to "/home/test1sftp"
>> 10:44:58  sshd: Starting session: forced-command (config) 'internal-sftp
>> -l verbose' for test1sftp from xxx  port 30534
>> 10:44:58  internal-sftp
>> 10:44:58  internal-sftp: received client version 3
>> 10:44:58  internal-sftp: realpath "."
>> 10:45:00  /usr/sbin/cron: (root) CMD (/usr/libexec/atrun)
>> 10:45:02  internal-sftp: realpath "/uploadhere"
>> 10:45:02  internal-sftp: stat name "/uploadhere"
>> 10:45:04  internal-sftp: opendir "/uploadhere/"
>> 10:45:04  internal-sftp: closedir "/uploadhere/"
>> 10:45:04  internal-sftp: lstat name "/uploadhere/valid-ip.c"
>> 10:45:04  internal-sftp: lstat name "/uploadhere/valid-ip.c"
>> 10:45:04  internal-sftp: remove name "/uploadhere/valid-ip.c"
>> 10:45:09  internal-sftp: open "/uploadhere/valid-ip.c" flags
>> WRITE,CREATE,TRUNCATE mode 0644
>> 10:45:09  internal-sftp: close "/uploadhere/valid-ip.c" bytes read 0
>> written 615
>> 10:45:10  internal-sftp: opendir "/uploadhere"
>> 10:45:10  internal-sftp: closedir "/uploadhere"
>> 10:45:11  internal-sftp
>> 10:45:11  sshd: Received disconnect from xxxx: 11: disconnected by user
>>
>>
>> I have a few hundred users. Apart from creating dev/log hard links for
>> every home directory, is there a different way to go about this ?
>>
>> Are there any security issues I need to be aware of ?
>>
>> 	---Mike
>>
>
> Let me be sure I understand your setup correctly, ssh, sftp, and all the
> users are defined in the same jail.
>
> In the jail remove  ChrootDirectory %h option from sshd_config.
>





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