freebsd

A day or two ago I upgraded the ports in my jails. This stopped postfix from accepting mail. The problem was that postgrey, which listens for postfix on tcp/10023 stopped running. It produced an error about not being able to bind to ::1. I got it back running again by altering the flags in the startup script (/usr/local/etc/rc.d/postfix) from:

postgrey_flags=${postgrey_flags:-"--pidfile=${postgrey_pidfile}  --inet=10023 -d --user=postgrey --group=postgrey --dbdir=/var/db/postgrey  --x-greylist-header=${postgrey_greylist_header}"}

to

postgrey_flags=${postgrey_flags:-"--pidfile=${postgrey_pidfile}  --inet=127.0.0.1:10023 -d --user=postgrey --group=postgrey --dbdir=/var/db/postgrey  --x-greylist-header=${postgrey_greylist_header}"}

This forces binding to the IPv4 port only.

I usually perform a binary update of my jails using

#freebsd-update fetch install #freebsd-update -d /usr/jails/basejail fetch install

This has worked for years. After doing it yesterday I was unable to login to any of my jails and pretty much everything broke. For example logging in using ssh gave logged the error: /bin/sh permission denied

After spending the day on it I have discovered that the upgrade process changed permissions on /usr/jails/basejail to 700. Changing it to 755 fixed everything.

Roundcube comes with a password change module, through it's disabled by default. Configuring it to change passwords on another server's passwd database is another matter. The instructions only cover using chpasswd on a Linux server to update the local password database.

On the mail server:

• adduser roundcube, set a shell and create a home directory.
• visudo, adding roundcube ALL = NOPASSWD: /usr/sbin/pw

On the web server:

• chpass www, assigning a shell to allow logins.
• su www, impersonate www.
• ssh-keygen -t rsa, create an RSA private/public key pair.
• scp /home/www/.ssh/id_rsa.pub roundcube@<em>remotehost</em>/~/.ssh/authorized_keys, copying the public key to the mail server to allow passwordless logins.

The chpasswd driver (/www/roundcube/plugins/password/drivers/chpasswd.php will require modification.

function password_save($currpass, $newpass) { 
    $cmd = rcmail::get_instance()->config->get('password_chpasswd_cmd'); 
    $username = $_SESSION['username']; 
    $handle = popen($cmd, "w"); 
 
    fwrite($handle, "$newpass
"); 
    if (pclose($handle) == 0) { return PASSWORD_SUCCESS; }     
    else { 
        raise_error(array( 'code' => 600, 'type' => 'php', 'file' => __FILE__, 'line' => __LINE__, 'message' => "Password plugin: Unable to execute $cmd" ), true, false); 
    } 
    return PASSWORD_ERROR; 
}

And so will this line in /www/roundcube/plugins/password/config.inc.php

// chpasswd Driver options 
// --------------------- 
// Command to use 
$rcmail_config['password_chpasswd_cmd'] = "ssh roundcube@mailhost sudo pw usermod -n {$_SESSION['username']} -h 0 2> /dev/null";