October 2011

Postfix – Auth Dovecot Backend

main.cf file Postfix related parametes:

smtpd_sasl_authenticated_header = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth

dovecot.conf file Dovecot related parameters:

auth default {
mechanisms = plain login

[…removed irrelevance parameters…]


socket listen {
client {
path = /var/spool/postfix/private/auth
mode = 0660
user = postfix
group = postfix
}
}
}

Postfix – Auth Dovecot Backend Read More »

Linux – Multicast DVB-S router for EUMETCast

This simple script transform a linux box into a DVB-S Satellite router to receive data from Eurobird 9E used by EUMETSAT to redistribute weather satellite image.

REQUIRE:
DVB Tools
SMCroute
PCI Card supported by Linux/DVB Tools (ex. Skystar 2)

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#!/bin/bash
####################################################################
#								   #	
# Leonardo Rizzi 						   #
# Late night 24/04/2010						   #
# Revision 1.0							   #
# Tune DVB-S pci card for Eurobird 9E shifted from 13E Hotbird     #
# Tune, set net PID, Enable multicasting ecc. ecc. blah blah buuuu #
#								   #	
####################################################################
 
#Globalvar
DTUNE="/usr/bin/dvbtune"
DNET="/usr/bin/dvbnet"
MROUTE="/usr/sbin/smcroute"
IFCONFIG="/sbin/ifconfig"
 
SERVICE="eumetsat"
 
#Set dvbcard 0-3
INT="0"
 
#Set multicast forwarding interface and ip (by default TelliCast bind on 192.168.238.238)
MINT="eth1"
MIP="192.168.238.238"
 
#Set absolute frequency in Hz
FREQ=11977000
 
#Set polarization
POL=H
 
#Set symbol rate
SYR=27500
 
#Set PID one space for value separation
PID="100 300 301 302 500 509 510 511"
 
 
#Begin start!!
 
case "$1" in
  start)
  	# Pre-Start check
 
  	test -x $DTUNE || { echo "$DTUNE not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -x $DNET || { echo "$DNET not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -x $MROUTE || { echo "$MROUTE not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -x $IFCONFIG || { echo "$IFCONFIG not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -d /dev/dvb/adapter$INT || { echo "DVB$INT device not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
 
	# Tuning the dvb frequency 
	echo ""
	echo "Tune the satellite donwlink on interface ${INT}"
	${DTUNE} -c ${INT} -f ${FREQ} -p ${POL} -s ${SYR} -m >/dev/null 2>&1 &
 
	# Set address on local forwarding interface and bring it up
	echo ""
	echo "Set multicast forwarding interface ${MINT}"
	${IFCONFIG} ${MINT} ${MIP} multicast up
 
	# Set PID on active dvb interface
	echo ""
	echo "Set net interface for listed PID:"
	for i in ${PID}
	do
	echo "Bring up PID $i"
	${DNET} -a ${INT} -p $i>/dev/null 2>&1
	done
 
	# Set address on dvbs interfaces and bring it up
	echo ""
	echo "Set net interface up:"
	for ii in {0..7}
	do
	echo "Bring up dvb net interface $ii"
	${IFCONFIG} dvb${INT}_$ii 192.168.22$ii.238 up >/dev/null 2>&1
	done
 
	# Start multicast router
	echo ""
	echo "Enable Multicast Router"
	${MROUTE} -d
 
	#PID 100 multicast forward
	echo "Set multicast for PID 100"
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.34 ${MINT}
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.36 ${MINT}
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.40 ${MINT}
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.223 ${MINT}
 
	#PID 300 multicast forward
	echo "Set multicast for PID 300"
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.21 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.31 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.32 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.37 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.226 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.252 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.253 ${MINT}
 
	#PID 301 multicast forward
	echo "Set multicast for PID 301"
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.23 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.33 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.38 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.39 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.35 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.227 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.251 ${MINT}
 
	#PID 302 multicast forward
	echo "Set multicast for PID 302"
	${MROUTE} -a dvb0_3 192.168.1.1 224.223.222.25 ${MINT}
 
	#PID 500 multicast forward
	echo "Set multicast for PID 500"
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.1 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.22 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.28 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.27 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.29 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.30 ${MINT}
 
	#PID 509 multicast forward
	echo "Set multicast for PID 509"
	${MROUTE} -a dvb0_5 192.168.1.1 224.223.222.248 ${MINT}
	${MROUTE} -a dvb0_5 192.168.1.1 224.223.222.249 ${MINT}
	${MROUTE} -a dvb0_5 192.168.1.1 224.223.222.250 ${MINT}
 
	#PID 510 multicast forward
	echo "Set multicast for PID 510"
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.231 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.232 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.233 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.234 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.235 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.236 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.237 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.239 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.240 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.242 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.243 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.244 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.245 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.246 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.247 ${MINT}
 
	sleep 5
	;;
 
  stop)
	# Stopping the dvb card
	echo ""
	echo "Stopping Satellite Downlink"
	killall dvbtune >/dev/null 2>&1
 
	echo ""
	echo "Stopping Multicast Routing"
	# Stopping Multicast Router
	${MROUTE} -k
 
	# Disable dvbs interfaces and remove active PID
	echo ""
	echo "Shutting down DVB-S interfaces"
	for iii in {0..7}
	do
	/sbin/ifconfig dvb0_$iii down >/dev/null 2>&1
	${DNET} -d $iii >/dev/null 2>&1
	done
 
	# Remove and disable multicasting forwarding interface
	echo ""
	echo "Shutting down multicasting forwarding interface"
	${IFCONFIG} ${MINT} del ${MIP} multicast
	${IFCONFIG} ${MINT} down
 
	;;
 
  restart)
 
	$0 stop
	$0 start
	;;
 
  status)
 
  	PID1='pidof dvbtune'
  	echo ""
  	echo "Tuning subsystem running at pid" $PID1
 
  	PID2='pidof smcroute'
  	echo ""
  	echo "Mulicast router running at pid" $PID2
 
	;;
 
  multicast)
 
  	echo "Multicasting Routing table:"
  	ip mroute show  
	;;
 
  *)
	echo "Usage: $0 [start|stop|restart|status|multicast]"
	;;
esac
 
exit;s

Linux – Multicast DVB-S router for EUMETCast Read More »

The Windows Installer Service could not be accessed.

The Windows Installer Service could not be accessed.
This can occur if you are running Windows in safe
mode, or if the Windows Installer is not correctly
installed. Contact your support personnel for assistance.

kb315353

To resolve this issue, follow these steps:

1. Log on to your computer as an administrator.
2. Click Start, and then click Run.
3. In the Open box, type cmd, and then click OK.
4. At the command prompt, typemsiexec.exe /unregister, and then press ENTER.
5. Type msiexec /regserver, and then press ENTER.
6. Verify that the SYSTEM account has full control access permissions to the
HKEY_CLASSES_ROOT
hive in the Windows registry. In some cases, you may also have to add Administrator accounts. To do so:Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 (http://support.microsoft.com/kb/322756/ ) How to back up and restore the registry in Windows
1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Click the following registry hive:
HKEY_CLASSES_ROOT
3. On the Edit menu, click Permissions.
4. If SYSTEM is not listed in the Group or user names list, click Add, make sure that the local computer name appears in the From this location box, type system in the Enter the object names to select box, click Check Names, and then click OK.
5. Click SYSTEM in the Group or user names list, and then select the Full Control check box under Allow in the Permissions for SYSTEM box.
6. Click Apply, click OK, and then quit Registry Editor.
7. Restart the computer. If the problem is not resolved, repair Windows XP. For more information about how to repair Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
315341 (http://support.microsoft.com/kb/315341/ ) How to perform an in-place upgrade (reinstallation) of Windows XP

The Windows Installer Service could not be accessed. Read More »