It seems that this scanner only implements TWAIN technology. Newest Windows OS seems to be shipped with WIA only. In order to use those type of scanners you will need to install scanning software that understand TWAIN. The simplest thing to do is to install 32 bit driver and run:
C:\Windows\twain_32\CNQSG\SGST.exe
SharePoint Uninstall
Well…, it is very strange, that SP uninstall remove English languge ?!
1.If you get :
Exception: Microsoft.SharePoint.SPException: The language is not supported on the server. —> System.Runtime.InteropServices.COMException (0x8102005E): The language is not supported on the server.
you have to reinstall language pack.
2.If you wonder, SP Console caches .NET configuration files ?!
SetCom Smart Cart Pico Howto
This smart card seems to support only 1024 bit key length and certificates in der format with .cer file extension.
Steps to generate and import keys:
1. generate private key and self signed certificate:
openssl req -x509 -nodes -days 3650 -newkey rsa:1024 -keyout privateKey.key -out certificate.crt
2. convert certificate to der format with cer extension
openssl x509 -outform der -in certificate.crt -out certificate.cer
2a. or optionally pack key and certificate in single file
openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt
3. import resulting file/files
Implementing Horde Groupware. Integration with Microsoft Active Directory (MSAD).
1. Objectives:
Our goal is to implement Horde (feature rich e-mail, time tracking, calendar and task system). We have to design underlying infrastructure as well. That system should have web based access, should be capable to filter e-mail messages for spam and viruses, should integrate user management with existing MSAD. As we need modular, suitable for small to mid-sized organizations design, easy to test and deploy we decided to split mail filter (mailfilter), mail store (mail), web access(www) and MSAD(dc1) on different servers. We also decided to build mailfilter, mail and www servers as guest servers (vservers) running on top of linux-vserver host machine. Some of positives are:
- There is no overhead at all. Easy to set as test system or learning lab. Easy to install, remove and manage vservers.
- Increased security.
- Guests are almost hardware independent.
- As load grows or when we have hardware failures, we can easily move a guest from one host to another.
2. Install Linux-Vserver (optional)
We use Gentoo Linux as our primary distribution both as host and guests [1].
You will need:
2.1. Kernel support.(all distributions)
# Obtain vserver patch
wget http://vserver.13thfloor.at/Experimental/patch-2.6.27.6-vs2.3.0.36.1.diff
# Obtain kernel sources
wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.27.6.tar.bz2
#
tar -xjvf linux-2.6.27.7.tar.bz2
#
cd linux-2.6.27.7
# Configure your kernel. This step is important!
make menuconfig
#patch your kernel
patch -p1 < ../patch-2.6.27.6-vs2.3.0.36.1.diff
#enable linux-vserver code
make menuconfig
#compile
make
#install kernel and moddules
make modules_install
cp ./arch/your_arch/bzImage /boot/whatever
2.2. Vserver utils(all distributions)
(on Gentoo)
emerge -pv util-vserver
rc-update add vservers.default default
/etc/init.d/vservers.default start
(on Debian)
apt-get install util-vserver
2.3. Guest images.(all distributions)
(all distributions)
# note –initstyle parameter, possible value ‘plain’
(on Gentoo)
#Obtain vserver image
wget http://people.linux-vserver.org/~hollow/stages/stage4-i686-20070905.tar.bz2
# Build mailfilter
vserver mailfilter build \
–context 16 \
–hostname mailfilter \
–interface eth0:192.168.55.16/24 \
–initstyle gentoo \ (replace if needed)
-m template — \
-d gentoo \
-t /path/to/stage4-i686-20070905.tar.bz2
# Build mail
vserver mail build \
–context 17 \
–hostname mail \
–interface eth0:192.168.55.17/24 \
–initstyle gentoo \ (replace if needed)
-m template — \
-d gentoo \
-t /path/to/stage4-i686-20070905.tar.bz2
# Build www
vserver www build \
–context 18 \
–hostname www \
–interface eth0:192.168.55.18/24 \
–initstyle gentoo \ (replace if needed)
-m template — \
-d gentoo \
-t /path/to/stage4-i686-20070905.tar.bz2
#start vservers
vserver mailfilter start
vserver mail start
vserver www start
#(optiomal) update (each) vservers
vserver www enter
emerge -pvu system
emerge -pvu world
revdep-rebuild -pv
3. Configure Mailfilter.
Emerge (install) postfix and MailScanner.
#Adjust needed use flags
USE=”clamav f-prot postfix spamassassin” ACCEPT_KEYWORDS=”~x86″ emerge -pv MailScanner
#open /etc/MailScanner/MailScanner.conf
#and edit according your needs
#open /etc/postfix/main.cnf
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
relay_domains = example.com
relayhost = mail.example.com
header_checks = regexp:/etc/postfix/header_checks
;smtpd_delay_reject = yes
;smtpd_helo_required = yes
;smtpd_helo_restrictions =
; permit_mynetworks,
; check_helo_access
; hash:/etc/postfix/hello_access,
;reject_non_fqdn_hostname,
; reject_invalid_hostname,
; permit
;smtpd_sender_restrictions =
; permit_sasl_authenticated,
; permit_mynetworks,
; reject_non_fqdn_sender,
; reject_unknown_sender_domain,
; permit
;smtpd_recipient_restrictions =
; reject_unauth_pipelining,
; reject_non_fqdn_recipient,
; reject_unknown_recipient_domain,
; permit_mynetworks,
; permit_sasl_authenticated,
; reject_unauth_destination,
; permit
#run
postmap hello_access
# Create file
echo “/^Received:/ HOLD”>>/etc/postfix/header_checks
# Edit /etc/postfix/master.cf
#We set host name to be mail, not mailfilter in smtp greeting message
#change following line
#localhost:smtp inet n – n – – smtpd
#to
#localhost:smtp inet n – n – – smtpd -o myhostname=mail
#remove postfix from default run level
rc-update del postfix default
#add MailScanner to default run level
rc-update add MailScanner default
#and run it
/etc/init.d/MailScanner start
#on debian based distribution use update-rc.d command
#
#emerge spf
;ACCEPT_KEYWORDS=”~x86″ emerge -v pypolicyd-spf
#
# Add following to master.cf
;policyd-spf unix – n n – 0 spawn
; user=nobody argv=/usr/bin/python /usr/bin/policyd-spf
# Add following ot main.cf
; reject_unauth_destination
; check_policy_service unix:private/policyd-spf
;
# emerge postgrey
;emerge -pv postgrey
; add to run level
;rc-update add postgrey default
4. Configure Mail.
4.1. Emerge (install) postfix and dovecot with sasl and ldap support. Process will vary depending of your Linux flavor. On Gentoo:
USE=”ssl ldap sasl sieve” emerge -pv postfix dovecot
4.2. Create vmail user[2].
Quote from [2]: “Create a new user, we will call it vmail. Change the Login Shell to /sbin/nologin, this user account should not be used for logging in. Take note of the User ID and Home Directory of vmail. Note the Group ID of vmail. We’ll be needing all of them later.“
4.3. Create a user ‘qu’ (or any other name) in MSAD with bigstrongpassword.
Note that user name , login and person name must all be the same. We will use this account information for querying ldap server only.
4.3. Configure postfix[2].
# create /etc/postfix/ldap_users.cf
server_host = dc1.example.com
search_base = dc=example,dc=com
version = 3
query_filter=(&(objectclass=person)(|(mail=%s)(othermailbox=%s)))
result_attribute=sAMAccountName
result_format=%s/.maildir/
bind=yes
bind_dn=qu@example.com
bind_pw=bigstrongpassword
# Create /etc/postfix/ldap-groups.cf [3]
server_host = dc1.example.com
search_base = dc=example,dc=com
version = 3
query_filter=(&(objectclass=group)(mail=%s))
leaf_result_attribute= mail
special_result_attribute = member
bind=yes
bind_dn=qu@example.com
bind_pw=bigstrongpassword
# Create /etc/postfix/ldap-forward.cf
server_host = dc1.example.com
search_base = dc=example,dc=com
version = 3
query_filter=(&(objectclass=person)(|(mail=%s)))
result_attribute=wWWHomePage
bind=yes
bind_dn=qu@example.com
bind_pw=bigstrongpassword
#edit /etc/postfix/main.cf
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
myhostname =mail.example.com
mydomain = example.com
mydestination = $myhostname, localhost.$mydomain, localhost
virtual_mailbox_domains = $mydomain
virtual_mailbox_base=/home/vmail/
virtual_mailbox_maps=ldap:/etc/postfix/ldap-users.cf
virtual_uid_maps=static:1000
virtual_gid_maps=static:1000
virtual_alias_maps=ldap:/etc/postfix/ldap-groups.cf
recipient_bcc_maps=ldap:/etc/postfix/ldap-forward.cf
virtual_transport=dovecot
dovecot_destination_recipient_limit=1
message_size_limit=102400000
unknown_local_recipient_reject_code = 550
mynetworks = 192.168.1.0/24, 127.0.0.0/8,172.16.55.0/24
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_recipient_restrictions= permit_mynetworks,permit_sasl_authenticated,reject
smtpd_tls_security_level = may
smtpd_tls_auth_only = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_key_file = /etc/ssl/private/mail2.key
smtpd_tls_cert_file = /etc/ssl/private/mail2.crt
smtpd_tls_CAfile = /etc/ssl/private/ca.crt
smtpd_tls_loglevel = 3
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
sendmail_path = /usr/sbin/sendmail
newaliases_path = /usr/bin/newaliases
mailq_path = /usr/bin/mailq
setgid_group = postdrop
html_directory = /usr/share/doc/postfix-2.5.5/html
manpage_directory = /usr/share/man
sample_directory = /etc/postfix
readme_directory = /usr/share/doc/postfix-2.5.5/readme
home_mailbox = .maildir/
#Edit /etc/postfix/master.cf
#add dovecot transport and comment old local transport
local unix – n n – – pipe
flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/deliver2 ${user}
;#move
;mv /usr/lib/postfix/local /usr/lib/postfix/localp
#create filе /usr/lib/postfix/local
#!/bin/bash
HOME=”/home/vmail/$1/” /usr/libexec/dovecot/deliver
4.4. Configure dovecot[2]
#edit (create) /etc/dovecot/dovecot-ldap.conf
hosts = dc1.example.com
dn = qu
dnpass = bigstrongpassword
auth_bind = yes
auth_bind_userdn =EXAMPLE\%u
ldap_version = 3
base = dc=example, dc=com
pass_filter = (&(objectClass=person)(uid=%u))
#edit /etc/dovecot/dovecot.conf
listen = [::]
disable_plaintext_auth = no
ssl_cert_file = /etc/ssl/private/mail2.crt
ssl_key_file = /etc/ssl/private/mail2.key
ssl_ca_file = /etc/ssl/private/ca.crt
mail_location = maildir:~/.maildir
protocol imap {
}
protocol pop3 {
}
protocol lda {
postmaster_address = postmaster@example.com
log_path = /home/vmail/dovecot-deliver.log
mail_plugins = cmusieve
sieve_global_dir = /home/vmail/
sieve_global_path=/home/vmail/global.sieve
}
auth_debug = yes
auth default {
mechanisms = plain
passdb pam {
args = “*”
}
passdb ldap {
args = /etc/dovecot/dovecot-ldap.conf
}
userdb passwd {
}
userdb static {
args = uid=1000 gid=1000 home=/home/vmail/%u
}
user = root
socket listen {
client {
path = /var/spool/postfix/private/auth
mode = 0660
user = postfix
group = postfix
}
}
}
dict {
}
plugin {
}
#create file /home/vmail/global.sieve
require [“fileinto”];
# Move spam to spam folder
if header :contains “X-Spam-Status” [“YES”] {
fileinto “spam”;
stop;
}
X-Spam-StatusTYESspam
5. Configure Horde.
5.1. Emerge (insall) Horde
USE=”crypt ldap mysql” ACCEPT_KEYWORDS=”~x86″ emerge -pv horde-webmail
5.2. Run setup
/var/www/localhost/htdocs/horde/scripts/setup.php
[1]Linux Vserver on Gentoo -useful on other distribution too:
http://www.gentoo.org/proj/en/vps/vserver-howto.xml
[2]Postfix and Dovecot ldap (MSAD) integration:
http://www.linuxmail.info/postfix-dovecot-ldap-centos-5/
[3]Active directory mailing list
http://www.linuxmail.info/postfix-active-directory-ldap-lookup-howto/
[4]
wget http://vserver.13thfloor.at/Experimental/patch-2.6.27.8-vs2.3.0.36.2.diff
wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.27.8.tar.bz2
tar -xjvf linux-2.6.27.8.tar.bz2
cd linux-2.6.27.8
make menuconfig
patch –dry-run -p1 <../patch-2.6.27.8-vs2.3.0.36.2.diff
patch -p1 <../patch-2.6.27.8-vs2.3.0.36.2.diff
mail postfix-out # cd /
mail / # postfix -c /etc/postfix-out check
postfix: fatal: chdir(/var/spool/postfix-out): No such file or directory
mail / # mkdir /var/spool/postfix-out
mail / # postfix -c /etc/postfix-out check
USE=”crypt ldap mysql apache2 bcmath ctype curl exif ftp gd gmp imap inifile hash simplexml snmp soap truetype xml zip xmlreader imap ssl session xml nls iconv gd ftp ldapcrypt mysql mysqli” ACCEPT_KEYWORDS=”~amd64″ emerge -v php horde-webmail
OpenFire LDAP paged result size
LDAP paged size ldap.pagedResultsSize Finally got it working
In order to work you will need to:
- Go to Server::Server Manager::System Properties::Add new property
Property Name: ldap.pagedResultsSize
Property Value: 1000 - Download source, apply patch, recompile.
There is optional patch that allows retrieving all users (in a single page) in admin interface. It also adds 500 and 1000 results per page.
Note: ldap.pagedResultsSize.patch_ is now applied to svn trunk.
OpenFire Active Directory LDAP integration
Contents1. Scenario |
1. Scenario
The scenario goal is to set up OpenFire with LDAP based authentication against Microsoft (MS) Active Directory (AD).
2. A brief introduction to LDAP protocol
LDAP is an application protocol. OpenFire will act as a client to a LDAP server – MS AD in our case. We will use AD LDAP for two reasons:
- User authentication
- Contact list (roster) population with users and groups already defined in AD.
How it works:
- You enter username and password in your jabber client.
- Your client sends your credentials to the OpenFire Server.
- The OpenFire server tries to connect to the LDAP server with these credentials (make a bind). If connection is successful the OpenFire server knows, that you are the one who you pretend to be.
- The OpenFire server reads user and group information from the AD via LDAP protocol according to some predefined criteria (search filters).
Basic assumption:
The easiest way to understand LDAP protocol is to imagine that the file browser on your computer is a LDAP server. You have a com directory with a subdirectory named company. The company directory in turn contains a subdirectory named my and so on. Let’s assume that you search for all png files. Depending on your search starting point your results will vary. If you search starts at OUS folder, you probably won’t get any results. In terms of LDAP the search starting point is called base dn and the search criteria is called search filter.
Now a real example:
Suppose we have an AD. The domain is called my.company.com, and the FQDN of the domain controller is dc1.my.company.com . There are two groups: salesand it. Both reside in Groups Organizational Unit (OU), which resides in OUS. We also have a Users OU. At the picture below you can see how the AD looks like viewed in Active Directory Users and Computers (at foreground) and viewed by an MS LDAP browser called ADSIEDIT (at background). Please take a look at the Distinguished Name. You can think about it as a full path to an object (a group, a person, etc.) in AD while using LDAP notation. Remember the example above? You can denote cn as a common name, ou as an organizational unit , dc as a domain component.
You can see how people records (DNs) look like in the AD and in an LDAP browser:
3. Configure OpenFire
First open your web browser. In our case OF is installed on dc1.
Next enter a domain name.
Choose LDAP integration
Configure database settings, then enter necessary information. Please note, that you can use a dedicated user account for OF administrator, no need for AD administrative privileges. Test settings!
Tweak your user and group filters! You can use this simple filter to extract only users with a valid email address. Of course you can use any valid field in LDAP schema as a search criteria.
(&(objectClass=organizationalPerson)(mail=*))
You can filter groups by ‘group name’. This filter will extract only groups ending with ‘-fg’.
(&(objectClass=group)(cn=*-fg))
Remember to test the admin login!
4 Tuning performance
4.1 Java virtual machine memory settings
In order to achieve best performance you will need to increase default memory used by java VM. In Gentoo linux – go to /etc/conf.d/openfire
and change -Xmx2048m to the desired value.
| /etc/conf.d/openfire | ||
|
4.2 Cache properties
You have to monitor your cache performance and most likely you will have to increase cache size. Go to server manager:: Caches summary. Watch for Roster cache size and usage. Some symptoms of inefficient cache size are: slow user connection, users appears offline while connected, messages are delayed, LDAP server experiences heavy traffic. Properties to note:
cache.ldap.size
cache.userCache.size
cache.userGroup.size
cache.username2roster.size
cache.vcardCache.size
I achieve best performance boost with Username2Roster.
If you have a large number of users and frequent logins, you can try to enable authCache:
ldap.authCache.enabled
ldap.authCache.size
4.3 Uninstall modules
Remove all unneeded modules.
ToDo / Note this is a work in progress/:
add links, more tweaks, more search filters.
OpenFire UserService Plugin extension
I want to be able to send messages from an external application via an http request to users. For this reason I ‘merged’ UserService and Subscription plugins. With this modification userService can send messages to users. All you need to do is to build a correct http request in your application.
- Note, that I’m NOT a Java programmer at all!
- In order to use this modification you’ll have to reinstall the userService Plugin.
- No error handling is provided.
New parameters added:
| sender | sender of the message | OF version |
| recipient | recipient of the message | 3.6+ |
| subject | subject of the message | 3.6+ |
| msg | body (text) of the message | 3.6+ |
| username | a valid username | 3.7+ |
Example query 3.6+ :
Example query 3.7+ :
All parameters can be sent via HTTP POST or GET methods in a single query. For example the sender, the recipient and the subject parameters use http GET, while the msg parameter uses http POST method.
Note: In order to send big (more than ~2k) messages you need to use POST method for the msg parameter. You need to urlencode() some or all the values!
userService_OF3.6.0_20080519_0
userService_OF3.7.0b_20100415_0
An example usage is an intranet web application that sends message to a user when someone opens a link. A simple PHP example:
| Simple PHP example | ||
|