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.\"
.\" Copyright (c) 2004, Nate Nielsen
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" * Redistributions of source code must retain the above
.\" copyright notice, this list of conditions and the
.\" following disclaimer.
.\" * Redistributions in binary form must reproduce the
.\" above copyright notice, this list of conditions and
.\" the following disclaimer in the documentation and/or
.\" other materials provided with the distribution.
.\" * The names of contributors to this software may not be
.\" used to endorse or promote products derived from this
.\" software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
.\" "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
.\" COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
.\" OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
.\" THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
.\" DAMAGE.
.\"
.\"
.\" CONTRIBUTORS
.\" Nate Nielsen <nielsen@memberwebs.com>
.\"
.Dd September, 2004
.Dt clamsmtpd.conf 5
.Os clamsmtp
.Sh NAME
.Nm clamsmtpd.conf
.Nd the configuration file for
.Xr clamsmtpd 8
.Sh DESCRIPTION
.Xr clamsmtpd 8
reads a configuration file when starting up. The location of the file is dependent
on how you compiled clamsmtp but it should usually be in either the
.Pa /usr/local/etc/
or
.Pa /etc/
directories. If
.Xr clamsmtpd 8
does not find its configuration file it'll print a warning when it starts up along
with the location it's expecting to find it in. You can also specify a different
location for a config file by passing the
.Fl f
argument to
.Xr clamsmtpd 8
.Pp
The settings are specified one per line. The setting names come first, followed
by a colon and then the value. Comments start with the '#' character on a line
of their own. Whitespace is ignored at the beginning of line, end of line and
around the colons.
.Pp
A sample configuration file can be found in the
.Pa doc/
directory of the clamsmtp distribution.
.Sh SETTINGS
The various settings are as follows:
.Bl -tag -width Fl
.It Ar Action
This option controls what
.Xr clamsmtpd 8
does when it finds a virus. The options are:
.Bl -inset
.It Ar bounce
Bounce the email. In most cases this is not a good idea since many viruses
spoof sender addresses.
.It Ar drop
Silently drop the email. Recommended.
.It Ar pass
Pass on the email. Inserts an 'X-Virus-Infected' header.
.El
.Pp
[ Default: drop ]
.It Ar ClamAddress
Specifies the address to connect to
.Xr clamd 8
on. See syntax of addresses below.
.Pp
[ Default:
.Pa /var/run/clamav/clamd
]
.It Ar Header
A header to add to scanned messages. Put an empty value to suppress adding
a header. You can include the following special formatting characters in the
string to include special values:
.Bl -inset
.It Ar %i
Client IP Address
.It Ar %l
Local IP Address
.It Ar %d
Current Date
.El
.Pp
You can also include the standard \\r or \\n escapes.
.Pp
[ Default: 'X-Virus-Scanned: ClamAV using ClamSMTP' ]
.It Ar KeepAlives
On slow connections the server will sometimes timeout before
.Xr clamsmtpd 8
is finished scanning the file. This option sends NOOP's to the server
to keep the connection alive. Specify the number of seconds, or 0
to disable.
.Pp
[ Default: 0 ]
.It Ar Listen
The address and port to listen for SMTP connections on. See syntax of
addresses below.
.Pp
[ Default: port 10025 on all local IP addresses ]
.It Ar PidFile
Specifies a location for the a process id file to be written to. This file
contains the process id of
.Nm
and can be used to stop the daemon. If the
.Fl p
argument is passed on the command line, then this setting will be ignored.
.Pp
[ Default: none ]
.It Ar Quarantine
Quarantine files that contain viruses by leaving them in the
.Ar TempDirectory
directory. The file names look like this (where X is a random
character or number):
.Pa virus.XXXXXX
.Pp
[ Default: off ]
.It Ar MaxConnections
Specifies the maximum number of connections to accept at once.
.Xr clamd 8
also needs to be setup to accept at least this number of connections.
.Pp
[ Default: 64 ]
.It Ar OutAddress
The address of the SMTP server to send email to once it's been scanned. See
syntax of addreses below.
.Pp
[ Required ]
.It Ar TempDirectory
The directory to write temp files to. This directory needs to be
accessible to both
.Xr clamd 8
and
.Xr clamsmtpd 8
.Pp
[ Default:
.Pa /tmp
]
.It Ar TimeOut
The number of seconds to wait while reading data from network connections.
.Pp
[ Default: 180 seconds ]
.It Ar TransparentProxy
This option enables transparent proxy support, which allows you to route all
SMTP traffic that's going through a gateway through clamsmtp which will then
send it on to its final destination. This setup usually involves firewall
rules which redirect traffic to clamsmtp, and the setup varies from OS to OS.
.Pp
[ Default: off ]
.It Ar User
The user to run as. If this option is specified then
.Xr clamsmtpd 8
must be started as root. It will then drop root privileges and run as the
specified user. The user can either be a name or a numerical user id.
.Pp
[ Optional ]
.It Ar VirusAction
This is a command to run when a virus is found. See the VIRUS ACTION section
in
.Xr clamsmtpd 8
for a discussion of this option.
.Pp
[ Default: off ]
.It Ar XClient
Send an XCLIENT command to the receiving server. This is useful for forwarding
client addresses and connection info to servers that support this feature.
.Pp
[ Default: off ]
.El
.Sh ADDRESSES
Addresses can be specified in multiple formats:
.Bl -bullet
.It
Unix local addresses can be specified by specifying their full path.
(ie: '/var/run/clamav/clamd').
.It
IP addresses can be specified using dotted notation with a colon before
the port number (ie: '127.0.0.1:3310').
.It
IPv6 addresses are implemented but disabled. The code needs testing.
.El
.Sh SEE ALSO
.Xr clamsmtpd 8
.Sh AUTHOR
.An Nate Nielsen Aq nielsen@memberwebs.com
|
