SNMP + MRTG

苗栗縣大湖鄉大南國民小學全球資訊網路 (FreeBSD) 架站日誌 本文件僅供本站自主維修之用，若您操作時出了問題，請恕本站無法提供任何協助，因為這只是一篇私人的筆記而以。 SNMP + MRTG

手抄筆記，尚待整理。針對FreeBSD主機上的網路卡啟動SNMP協定，再以MRTG統計這塊網卡的進出流量。 

苗栗縣大湖鄉大南國民小學全球資訊網路 (FreeBSD) 架站日誌 本文件僅供本站自主維修之用，若您操作時出了問題，請恕本站無法提供任何協助，因為這只是一篇私人的筆記而以。 SNMP + MRTG

手抄筆記，尚待整理。針對FreeBSD主機上的網路卡啟動SNMP協定，再以MRTG統計這塊網卡的進出流量。 wget ftp://ftp.lab.mlc.edu.tw/UNIX/snmp/ucd-snmp-4.2.tar.gz tar zxvf ucd-snmp-4.2.tar.gz -C /usr/local/src cd /usr/local/src/ucd-snmp-4.2 第一個步驟時，安裝程式會要求您回答一些問題。 ./configure ************** Configuration Section ************** You are about to be prompted by a series of questions. Answer them carefully, as they determine how the snmp agent and related applications are to function. After the configure script finishes, you can browse the newly created config.h file for further - less important - parameters to modify. Be careful if you re-run configure though since config.h will be over written. -Press return to continue- Describes who should be contacted about the host the agent is running on. This information is available in the MIB-II tree. This Can Also Be Over-Ridden Using The "syscontact" Syntax In The Agent'S Configuration Files. System Contact Information ([email protected]): setting System Contact Information to... [email protected] checking System Location... *** System Location: Describes the location of the system. This information is available in the MIB-II tree. This Can also be over-ridden using the "syslocation" syntax in the agent's configuration files. System Location (Unknown): dns.lab.mlc.edu.tw ( 填入主機名稱 ) setting System Location to... dns.lab.mlc.edu.tw checking Location to write logfile... *** Logfile location: Enter the default location for the snmpd agent to dump information & errors to. If not defined (enter the keyword "none" at the prompt below) the agent will use stdout and stderr instead. (Note: This value can be over-ridden using command line options.) Location to write logfile (/var/log/snmpd.log): setting Location to write logfile to... /var/log/snmpd.log checking Location to write persistent information... *** snmpd persistent storage location: Enter a directory for the snmp library to store persistent data in the form of a configuration file. Location to write persistent information (/var/ucd-snmp): make umask 022 make install 啟動snmp /usr/local/sbin/snmpd -p 161,tcp:161,9161@localhost 加入 /etc/rc.local 每日凌晨校時。 wget ftp://ftp.lab.mlc.edu.tw/UNIX/mrtg/mrtg-2.9.10.tar.gz tar zxvf mrtg-2.9.10.tar.gz -C /usr/local/src cd /usr/local/src/mrtg-2.9.10 ./configure --prefix=/usr/local/mrtg-2 --with-gd=/usr/local/include/gd --with-gd-lib=/usr/local/lib --with-gd-inc=/usr/local/include/gd --with-png=/usr/local/include --with-zlib=/usr/local/include make make install 新增使用者： aduser mrtg su - mrtg mkdir public_html cp /usr/local/src/mrtg-2.9.10/images/* /home/mrtg/public_html 利用 cfgmaker 製造出 mrtg.cfg ，這個 mrtg.cfg 建議與 mrtg 程式放在一起。 /usr/local/mrtg-2/bin/cfgmaker --global 'WorkDir: /home/mrtg/public_html' --global 'Options[_]: bits,growright' --global 'Language: big5' --output /usr/local/mrtg-2/bin/mrtg.cfg [email protected] /usr/local/mrtg-2/bin/mrtg /usr/local/mrtg-2/bin/mrtg.cfg 用完整的檔案路徑連續執行三次，第一次一定會有錯誤訊息，繼續做，直至沒有錯誤訊息為止。 chown mrtg /home/public_html/* 修改或確認 /usr/local/mrtg-2/bin/mrtg.cfg 檔案設定內容： WorkDir: /usr/local/apache/htdocs/mrtg Options[_]: bits,growright Language: big5 製做首頁：  /usr/local/mrtg-2/bin/indexmaker --output='/home/mrtg/public_html/index.html' --title='www.lab.MLC.edu.tw 主機的流量統計' --rrdviewer='.' /usr/local/mrtg-2/bin/mrtg.cfg 加入 /etc/crontab ，每五分鐘統計乙次流量。 */5 * * * * root /usr/local/mrtg-2/bin/mrtg /usr/local/mrtg-2/bin/mrtg.cfg > /dev/null 2>&1 

參考文件：
http://aerosol.ev.ncku.edu.tw/~vbird/safe/04mrtg.html

如何顛倒MRTG的流出與流入

http://net-snmp.sourceforge.net/tutorial/mrtg/

http://net-snmp.sourceforge.net/tutorial-5/