2010年10月29日星期五

Exchange Server 2007 Resource Mailboxes Part 2 – Equipment Mailboxes

Exchange Server 2007 Resource Mailboxes Part 2 – Equipment Mailboxes

Written by Paul Cunningham on May 25, 2009

In my last post I explained the concept of resource mailboxes in Exchange Server 2007, and demonstrated the creation of a Room Mailbox for managing meeting room bookings. In this post I will discuss the other type of resource mailbox – Equipment Mailboxes.

Equipment Mailboxes

Many businesses have tools or equipment that is provided by the company for staff to share and use for work related activities. For example, a company might have a portable projector that sales staff can carry to client offices for demonstrations, or a pool car that is used by field technicians to get to remote locations.

In order to manage the allocation of these resources to staff an Equipment Mailbox with a calendar is created so that staff can book the resource using Outlook.To create an Equipment Mailbox launch the New Mailbox wizard in the Exchange Management Console.

equipmb01

After choosing Equipment Mailbox I then choose to create the mailbox with a new user account.

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Fill out the user information fields. Although you must choose a password here you are not likely to ever need to use it, so just make it something secure.

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Choose a mailbox database to store the Equipment Mailbox.

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Complete the New Mailbox wizard. You can now see the newly created Equipment Mailbox in the recipient list for the organisation.

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As with the Room Mailbox created in the last post, the Exchange server has automatically disabled the user account associated with the Equipment Mailbox and set the password to never expire.

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Equipment Mailboxes also have the “Resource Information” tab the same as Room Mailboxes. Although the “Resource Capacity” field makes little sense for something like a portable projector, it can still be relevant to other uses of the Equipment Mailbox. For example a company car might have the seat capacity listed here.

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To automate the booking process you can set the mailbox calendar to automatically accept new bookings.

Set-MailboxCalendarSettings portableprojector
-AutomateProcessing AutoAccept

This will set the Equipment Mailbox to automatically accept any new bookings provided they do not conflict with an existing booking.

Users within the organisation can now add the Equipment Mailbox as a Resource to meeting requests.

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In a practical sense the portable projector is invited as an attendee and automatically accepts the booking because there are no prior bookings that conflict with it.

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By creating Equipment Mailboxes for shared items within the business it makes it fast and simple for staff to book the items they need when they need them, without incurring any administrative overhead for IT administrators or other staff who might normally manage such resources.


ref: http://www.theemailadmin.com/2009/05/exchange-server-2007-resource-mailboxes-part-2-equipment-mailboxes/

2010年10月26日星期二

PDF Split and Merge

Free PDF Split and Merge
http://www.pdfsam.org/

2010年9月24日星期五

[Olympus] - 如何查快門

如何查快門:
1 開機
2 打開CF倉門(LCD屏會報錯)
3 同時按下menu和ok按鈕(LCD上會出現相機型號)
4.順序按上、下、左、右、快門、上
5.此時進入工程菜單,按右鍵進入page2,字母R后面的數字就是快門數。

2010年9月15日星期三

DNS資源紀錄(Resource Record)介紹

DNS server內的每一個網域名稱都有自己的檔案,這個檔案一般會稱為區域檔案 (zone file),例如之前所提到的”named.ca”或”named.local” 檔案…等等。區域檔案是由多個記錄組成的,每一個記錄稱為資源記錄(Resource Record,簡稱RR)。當在設定DNS名稱解析、反向解析及其他的管理目的時,您需要使用不同類型的RR,底下將介紹常用的RR類型及表示法。


類型


SOA

Start Of Authority,這種 record 放在 zone file 一開始的地方,每一個記錄檔只能有一個 SOA,而且一定是檔案中第一個“記錄”,它描述這個 zone 負責的 name server,version number…等資料,以及當 slave server 要備份這個 zone 時的一些參數。 緊接在 SOA 後面指定了這個區域的授權主機和管理者的信箱,這裡分別是 "school.edu.tw" 和" root.school.edu.tw",也就是school.edu.tw主機和 root 的信箱。這裡要注意的是我們以"root.school.edu.tw"代表"root@school.edu.tw"
e.g.

  @    IN      SOA          school.edu.tw. root.school.edu.tw.  (                                      1999051401      ; Serial                                      3600            ; Refresh                                      300             ; Retry                                      3600000         ; Expire                                      3600 )          ; Minimum        

在兩個括號中間的選項表示SOA的設定內容,底下會有更詳細的說明。


NS

name server,用來指定操作的DNS伺服器主機名稱,需注意的是不可以IP位址表示。
e.g.

 IN  NS   dns.twnic.net.tw.       

A

address,將DNS網域名稱對應到IPv4的32位元位址。
e.g.

 server  IN  A  140.123.102.10       

AAAA

可將DNS網域名稱對應到IPv6的128位元位址。
e.g.

 twnic.net.tw.  86400  IN  AAAA  3ffe: :bbb:93:5       

PTR

pointer,定義某個 IP 對應的 domain name,即將 IP 位址轉換成主機的FQDN。
e.g.

 20   IN  PTR  mail.twnic.net.tw.       

CNAME

canonical name,可為同一部主機設定許多別名,例如 mix.twnic.net.tw的別名可為 www.twnic.net.tw和 ftp.twnic.net.tw,因此所設定的別名都會連至同一部伺服器。
e.g.

 www  IN  CNAME  mix       

MX

mail exchanger,設定區域中擔任郵件伺服器的主機,所有要送往那部機器的 mail 都要經過 mail exchanger 轉送。而數字則是該主機郵件傳遞時的優先次序,此值越低表示有越高的郵件處理優先權。
e.g.

 server  IN   MX  10  mail.twnic.net.tw.           

SOA設定內容說明

SOA record,以之前例子來看,其中 @ 這個符號是縮寫,代表 named.conf 中這個 zone file 所對應的 zone。 SOA 後面的兩個參數是指這個 zone file 是在哪部主機 (school.edu.tw)定義的,以及這個 zone file 的負責人 (注意是寫成 root.school.edu.tw),然後是用括號括起來的 5 個參數, 分別由底下說明。


Serial


Refresh

slave server 每隔這段時間(秒),就會檢查 master server 上的 serial number。不過這裡會發生一個問題就是,在 master server 在 update data 完成到 slave server 來檢查時再 update 可能還有 好一段時間,因此這段期間 master/slave DNS server間 zone files 就可能出現不一致。所以在Bind較新的版本中便加入"notify"功能,使用者在 "named.conf" 設定中在需要的 zone 中加入"notify"的設定,則 master server在 update 完成某個 zone file 的 data 後便會主動發個訊息(NOTIFY),藉以通知該其它的 slave servers,因此如果 slave servers 也有支援這個"notify"功能時,接下來 slave servers 馬上就可以做 zone transfer 來update data。
e.g.

zone "twnic.com.tw" {   type master;  file "twnic.hosts";  notify yes;  also-notify { 192.168.10.1; }; //指定slave server的IP位址 };       

Retry

當 slave server 無法和 master 進行 serial check時,要每隔幾秒 retry 一次。


Expire

當時間超過 Expire 所定的秒數而 slave server 都無法和 master 取得連絡,那麼 slave 會刪除自己的這份 copy。


Minimum

代表這個 zone file 中所有 record 的內定的 TTL 值,也就是其它的 DNS server cache 這筆 record 時,最長不應該超過這個時間。


ref: http://dns-learning.twnic.net.tw/bind/intro6.html

What is an NS record?

An NS (name server) record allows you to delegate a subdomain of your domain to another name server.

For example you have the domain mydomain.com which is using the Domainmonster.com name servers. You decide that you want your own name server (myns.mydomain.com), for which you have already added an A-record, to look after the DNS for a subdomain on your domain: extranet.mydomain.com.

To do this, you would add an NS record for hostname/Zone "extranet" with the name server address "myns.mydomain.com". If someone therefore wants any DNS information about extranet.mydomain.com, our Domainmonster.com name servers will send them in the direction of the server at myns.mydomain.com.

2010年9月6日星期一

SQLite Database Browser

SQLite Database browser is a light GUI editor for SQLite databases, built on top of Qt. The main goal of the project is to allow non-technical users to create, modify and edit SQLite databases using a set of wizards and a spreadsheet-like interface.

ref: http://sourceforge.net/projects/sqlitebrowser/