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Basic Service & Settings

Basic Service & Settings. xclin. If you want to transfer a file…. By MSN ?. By CS or NCTU’s Web ?. Upload to bsdX and download from www.cs Quota is full!. By FTP Server Inside Your Windows ?. LAG Die! GG. With your own BSD. Configuration Files. Most Common Flow. Install

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Basic Service & Settings

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  1. Basic Service & Settings xclin

  2. If you want to transfer a file…

  3. By MSN ?

  4. By CS or NCTU’s Web ? • Upload to bsdX and download from www.cs • Quota is full!

  5. By FTP Server Inside Your Windows ? • LAG • Die! • GG

  6. With your own BSD

  7. Configuration Files

  8. Most Common Flow • Install • Package, ports and tar-ball • Configuration • Program specified config file • rc.conf • Startup • Maintenance

  9. Configuration Files (1/3) • Local-installed programs’ configuration files can be found in /usr/local/etc • Daemon → program-name.conf • dhcpd.conf • user-program → program-namerc • wgetrc • tinrc • Default config file usually installed with .sample or .default suffix • dhcpd.conf.sample or different suffix for different purpose • php.ini-dist • php.ini-recommended copy before use it

  10. Configuration Files (2/3) • A program with many config files are usually located in /usr/local/etc/program-name/ • apach22 • postfix • Most config files have clear comment at the beginning or before each description • Most popular styles • name <space>value • name = value Read documents to know each option’s meaning Example: proftpd.conf # Port 21 is the standard FTP port. Port 21 # To prevent DoS attacks, set the maximum # number of child processes to 30. ….. MaxInstances 30

  11. Configuration Files (3/3) • Some with local effectiveness • Markup language-like <directory /path>setting-for-this-path…</direction> • Samba、rsync [xxxx] settings… [yyyy] settings….

  12. RC Script

  13. RC Script • Dependency between each service is described in header of the script • Rcorder is used to find out dependency ordering of each script • Each rc script define what to do when start/stop … • /etc/rc.subr defines what to do & check before/after start stop ….

  14. How to use rc script(1/2) • Example ntpd >/etc/rc.d/ntpd Usage: /etc/rc.d/ntpd [fast|force|one](start|stop|restart|rcvar|status|poll) • Rcvar • Display which rc.conf variable are used to control the startup of service • Ex: ntpd_enable=“YES” • pidfile • Record (master) process id of the service • Start • Stop • Restart • Start + stop

  15. How to use rc script(2/2) • Status • Check the service is running or not • Relaod • Reload configuration file if the service support • One fast force • One • set rcvar = yes • Start the service even if XXXX_enable=NO • Force • Set rcvar = yes and • Fast • Skip pid check

  16. Local installed service • After install a service by ports, ports will display • This port has installed the following startup scripts which may cause • these network services to be started at boot time. • /usr/local/etc/rc.d/pure-ftpd • Use path-to-rcscript rcvar command to know which variable should set to “YES” to enable this service • For further information, read comments from that script • # Add the following lines to /etc/rc.conf to enable pure-ftpd: • # • # pureftpd_enable="YES" • # • # For launch uploadscript daemon define • # pureftpd_upload_enable="YES" • # pureftpd_uploadscript="/full/path/to/launch_script"

  17. HTTP & FTP (bonus homework) Due 2009/12/4

  18. FTP • Install proftpd or pure-ftpd • Anonymous Login • Chrooted (/home/ftp is your root) • Can download from /home/ftp/public • Can upload & mkdir but no download or delete from /home/ftp/upload • Hidden directry /home/ftp/hidden • There is a directory called “target” inside • Client can’t list in /home/ftp/hidden/ but can in hidden/target

  19. FTP • Create a system user “sysadm” • Could login by ssh • Password is your student id • Create a virtual user “ftp-vip” • Chrooted • Password is your student-id • Can login from 140.113.17.225 & your ip only • Full access to /home/ftp • Hidden directory is visible to vip

  20. HTTP • Install Apache22 or Lighttpd • Support userdir • http://your-ip/~username = /home/username/public_html • Files uploaded by FTP-2 can download through HTTP

  21. Demo • Demo with X-window

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