SMTPRC(1)SMTPRC(1)NAMEsmtprc - SMTP Relay Checker
SYNOPSISsmtprc [OPTIONS] ...
DESCRIPTIONsmtprc is a fully configurable multithreaded open mail relay scan‐
ner/checker. It can scan large networks for open relays and output the
results to a web page. It is intended for Systems Administrators to
check IP blocks under their control.
OPTIONS-c config-file
The config file specified with this option contains a list of
open relay checks to be performed when scanning. The file is
comprised of three columns, each of which is a different check
to be performed on the host being tested. The first column will
be sent with the HELO command; the second column will be sent
with the MAIL FROM: command; and the third column will be sent
with the RCPT TO: command.
example:
If the file contains the line.
x.x diceman@dircon.co.uk diceman@dircon.co.uk
The following commands will be sent to the server.
HELO x.x
MAIL FROM:diceman@dircon.co.uk
RCPT TO:diceman@dircon.co.uk
The following macros can also be used.
--IP_ADDRESS-- Represents the IP address of the current server
being checked.
--HOSTNAME-- Represents the domain name of the current server
being checked.
--NAME-- Represents the name part of the email address specified
with the -b option
--DOMAIN-- Represents the domain part of the email address spec‐
ified with the -b option.
As long as the format of this file is adhered to then as many
checks as is required can be added to this file.
-s ip-range
Specify the ip range to scan. Smtprc has a powerful notation
that allows you to specify an IP address range using
lists/ranges for each element. Thus you can scan the whole
class 'B' network 192.168/16 by specifying 192.168.*.* or
192.168.0-255.0-255 or 192.168.0-255.* You can also specify
multiple different ranges sepreated by ',' For example
192.168.1.*,172.16.1.* would scan both ranges 192.168.1.0/24
and 172.16.1.0/24
-i hostname-list
This option can be used instead of the -s option. The file spec‐
ified should contain a list of hostnames/IP addresses to scan
sepereated by newlines
-w output-html-page
Use this option to specify the name of a html file that the
results should be written to.
-f output-text-file
Use this option to specify the name of a text file that the
results should be written to.
-o output-machine-readable-format-file
Use this option to specify a file in which to save the scan
results in machine readable format. Each scan will be saved on
a single line with values seperated by commas. The values will
be: IP address, Domain name, Rule no, STATUS, Banner, HELO
reply, MAIL FROM: reply, RCPT TO: reply
-b email-address
This option specifies the email address that should be relayed
to while testing.
-e <path to mailbox>
This option specifies the (mbox) mailbox relating to the email
address specied with the -b option.
-u <path to mailbox>
This option specifies the (maildir) mailbox relating to the
email address specied with the -b option.
-y email-template-file
This option specifies the template to be used for all emails
sent while testing.
-j autoconfig-file
The auto config file contains a list of configuration options
for running smtprc smtprc can then be run just by specifying the
auto config file with this option. An auto config file can also
be generated with the -k option.
-k autoconfig-file
Use this option to generate an auto config file comprised of the
command line options currently being used. smtprc can then be
run using the -j option.
-p number-of-threads
Specify the number of threads to use when scanning (default
1000).
-a Display results of every scan (even those that passed all
tests).
-n Try to resolve all ip addresses into hostnames.
-m wait-for-mail-timeout
Specify the time in seconds to wait, after scanning, for relayed
mails to arrive.
-l connection-timeout
Specify the connect timeout in seconds (default 30).
-r read-timeout
Specify the read timeout in seconds (default 30).
-v Verbose output. Use twice for greater effect.
-h Display the help page.
FILES
/usr/local/etc/smtprc/rcheck.conf
The relay check configuration file. smtprc(1) for further
details.
/usr/local/etc/smtprc/email.tmpl
The email template file. smtprc(1) for further details.
/usr/local/etc/smtprc/auto.conf
The auto configuration file. smtprc(1) for further details.
/usr/share/doc/smtprc/README
The smtprc readme file. This file contains a detailed explana‐
tion of all of smtprc's features. smtprc(1) for further
details.
EXAMPLES
The following will scan the range 192.168.1.0/24 using 250 threads try‐
ing to relay to smtprc@lippy.warg.co.uk. It will also check the mbox
mail file /var/mail/smtprc 1 minute after scanning to see if any mails
have been relayed. It also display the results in html to
/usr/local/apache/htdocs/smtprc/html. The file /use/local/etc/smt‐
prc/email.tmpl will be used as the template for emails that are sent
through any servers that are scanned.
This scan will also create the file /usr/local/etc/smtprc/auto.conf
containing all of the command line options just used.
This scan is being run from lippy.warg.co.uk. Sendmail is running on
this machine and accepting all mail for smtprc@lippy.warg.co.uk.
smtprc-s 192.168.1.* -c /usr/local/etc/smtprc/rcheck.conf -e
/var/mail/smtprc -b smtprc@lippy.warg.co.uk -p 255 -w
/usr/local/apache/htdocs/smtprc.html -k /usr/local/etc/smtprc/auto.conf
-y /usr/local/etc/smtprc/email.tmpl
The next example will run smtprc taking all of the run time options
from the auto config file /usr/local/etc/smtprc/auto.conf
smtprc-j /usr/local/etc/smtprc/auto.conf
BUGS
Please report all bugs to diceman@dircon.co.uk.
SEE ALSOgsmtprc(1)AUTHOR
Spencer Hardy - diceman@dircon.co.uk
User Manuals DECEMBER 2004 SMTPRC(1)
