===== mrtg-reference =====
http://oss.oetiker.ch/mrtg/doc/mrtg-reference.en.html

===== SNMP Reference =====
http://www.debianhelp.co.uk/snmp.htm

http://blog.miniasp.com/post/2009/02/Ubuntu-804-snmpd-installation-and-configuration-notes.aspx

http://dieabsorb.wordpress.com/2011/04/05/snmp-%E5%B0%8F%E8%A8%98/

===== indexmaker =====
http://oss.oetiker.ch/mrtg/doc/indexmaker.en.html

====== Debian MRTG 簡易設定 ======
SNMP - Simple Network Management Protocol \\
MRTG - Multi Router Traffic Grapher

http://phorum.study-area.org/viewtopic.php?t=21142

===== 安裝 SNMP 和 MRTG =====
<code># apt-get install snmp snmpd mrtg mrtg-contrib</code>
出現詢問
<code>Make /etc/mrtg.conf owned by and readable only by the MRTG user?</code>
選擇Yes，讓一般使用者看不到 MRTG 的設定檔

===== 備份 SNMP 的設定檔 =====
<code># cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak</code>

===== 產生 SNMP 的設定檔 =====
<code># snmpconf</code>

如果是簡易設定，只要設定 Access Control Setup 的選項

Community name: public

即可，等 SNMP 可以運作之後再去詳細 config snmp

===== 重新啟動 SNMP =====
<code># /etc/init.d/snmpd restart</code>

===== 測試 SNMP =====
<code># snmpwalk -c public -v 1 localhost</code>

===== 簡易 smnpd.conf =====
<code>''rocommunity  public''</code>

===== 產生 mrtg.cfg =====
<code># cfgmaker --global 'WorkDir: /var/www/mrtg' --global "Refresh: 300" --global 'Options[_]: bits,growright' --global 'Language: big5' --output /etc/mrtg.cfg public@domain.name</code>

===== cfgmaker 另一種寫法 =====
((有空查 manual 比較差別))
<code># cfgmaker --global "WorkDir: /var/www/mrtg" --global "Refresh: 600" --global "Interval: 5" --global "WriteExpires: Yes" --global "Language: big5" --global "options[_]: bits" --ifdesc=descr --ifref=descr public@127.0.0.1 > /etc/mrtg.cfg</code>

  - /var/www/mrtg 是輸出的網頁存放地，該資料夾應該已經有一些基本的 MRTG 圖檔，檢查目錄是否存在、網頁伺服器是否可以存取
  - public@domain.name 把 domain.name 換成您主機的 domain.name，而 public 則是您當初用 snmpconf 指定的 community name。(如果失敗試試 127.0.0.1 )
  - mrtg.cfg 存在 /etc 下面

如果看到 SNMP Error: no response received 的訊息, 表示 snmpd.conf 還是沒有設好

===== 確認 MRTG 的狀態 =====
<code># mrtg /etc/mrtg.cfg</code>
執行三次，前兩次執行會出現 rateup 的警告，不用理。

===== 產生結果網頁 =====
<code># indexmaker --columns=1 --output=/var/www/mrtg/index.html --title='Traffic Info' /etc/mrtg.cfg</code>

===== 完成 =====
開啟網頁，EX: http://domain.name/mrtg/index.html

如果沒圖表出來，通常都是 SNMP 設定失敗

====== FreeBSD MRTG 簡易設定 ======
===== 使用 bsnmpd =====
參考：http://blog.gslin.org/archives/2007/08/19/1275/

===== Install SNMP and MRTG =====
  cd /usr/ports/net-mgmt/net-snmp; make install clean
  cd /usr/ports/net-mgmt/mrtg; make install clean

===== rc.conf =====
  snmpd_enable="YES"
  snmpd_flags="-a -p /var/run/snmpd.pid"
  snmptrapd_enable="YES"
  snmptrapd_flags="-a -p /var/run/snmptrapd.pid"

===== configure snmp =====
  cp /usr/local/share/snmp/snmpd.conf.example /usr/local/share/snmp/snmpd.conf

In /usr/local/share/snmp/snmpd.conf:
  #             sec.name  source          community
  com2sec local        localhost      public    # can name other symbol at community column

  #               sec.model  sec.name
  group MyRWGroup v1         local
  group MyRWGroup v2c        local
  group MyRWGroup usm        local

  #           incl/excl subtree                          mask
  view all    included  .1                               80

  #                context sec.model sec.level match  read   write  notif
  access MyRWGroup ""      any       noauth    exact  all    all    none

===== Start snmpd =====
  /usr/local/etc/rc.d/snmpd start

===== Create mrtg.cfg =====
  cfgmaker public@localhost

如果沒有錯誤訊息
  cfgmaker public@localhost > /usr/local/etc/mrtg/mrtg.cfg

依照 Http Server Documents Root 建立網頁資料夾
  mkdir /usr/local/www/apache22/data/mrtg

Modify /usr/local/etc/mrtg/mrtg.cfg
  #  for UNIX
  WorkDir: /usr/local/www/apache22/data/mrtg
  Language:Big5

===== Draw diagram =====
  /usr/local/bin/mrtg /usr/local/etc/mrtg/mrtg.cfg

Add into crontab
<code>
*/5 * * * * root /usr/local/bin/mrtg /usr/local/etc/mrtg/mrtg.cfg    # Every five minutes
</code>




===== Create MRTG's index file =====
  indexmaker --title='MRTG - 網路流量分析' --addhead=' \
  <META HTTP-EQUIV="Content-Type" CONTENT="text/html;charset=utf-8">' \
  --output /usr/local/www/apache22/data/mrtg/index.htm --columns=1 \
  --nolegend /usr/local/etc/mrtg/mrtg.cfg

====== smokeping ======
利用 rrdtools 繪出各網站的 ping 值

  # aptitude install smokeping

設定檔放在 /etc/smokeping，其中主要設定檔為 config，修改 owner contact cgiurl mailhost to from 這些設定值。

一些文字設定：title、remark等。

之後是站台設定，「+」代表跟目錄，「++」表子目錄。
<code>
+ Local
menu = Local
title = Local Network
++ LocalMachine
menu = Local Machine
title = This own machine
host = localhost

+ BBS
menu = BBS
title = BBS
++ Bahamut
menu = Bahamut
title = bbs.gamer.com.tw
host = bbs.gamer.com.tw
</code>

重新啟動服務
  # /etc/init.d/smokeping restart

網頁放在 http://your.website/cgi-bin/smokeping.cgi

圖案資料放在 http://your.website/smokeping/

====== Cacti ======
http://www.cacti.net/

Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality.