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Thread: Hardening SUSE LInux 11.1 - questions

  1. #1

    Default Hardening SUSE LInux 11.1 - questions

    Good morning Suse Experts
    I have found this very extensive tutorial on Suse Security written by leen Frisch (author of Essential System Administration)
    Linux Hardening

    For most of the services i have discovered what their function is on my linux box, but i can not find any documentation on the following services:

    Service..............YAST->System Services (RunLevel)-> Internal Comment:
    a11y....................enables a11y support on livecd ??
    acpid...................acpid reads events from /proc/acpi/event and dispatches them (by SuSE default) to other "users" like powersaved, HAL and IAL. Actions for those events are (by SUSE default) configured in the powersaved configuration. Additionally this start script loads all needed modules.??
    brld....................Starts brld the braille server ??
    sbl.....................Start suse-blinux ??
    avahi-daemon............Avahi, a ZeroConf daemon for mDNS and service registration ??
    fbsetup.................Framebuffer setup ??
    nscd....................Start Name Service Cache Daemon ??
    postfix.................Start the Postfix MTA ??
    rpcbind.................TI-RPC program number mapper ??
    splash..................Splash screen setup ??
    splash_early............Kills animation after network start ??
    stopblktrace............Stopping and parsing the blktrace output ??

    Questions:
    1. Can you help me with finding more documentation on these services? so i can determine if i can shut these services down or not?

    2. Is there a way / command / program that helps me to identify which service (deamon) belongs to with installed software package?


    Thanks for your time and answers

  2. #2
    Join Date
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    Default Re: Hardening SUSE LInux 11.1 - questions

    Last edited by john_hudson; 31-Aug-2009 at 00:40. Reason: Typo

  3. #3
    Join Date
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    Default Re: Hardening SUSE LInux 11.1 - questions

    And what about the man pages of these products. I just took one (nscd) and the man page is there. When you studied it and still havce questions we are there to try to help you.
    Henk van Velden

  4. #4
    Join Date
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    Default Re: Hardening SUSE LInux 11.1 - questions

    Hi

    1. man is your friend (as long as you have installed the manual pages). e.g. 'man rpcbind'. postfix is the mail transport agent and is the default on openSuSE-11.1. It is intended as a replacement for sendmail.

    2. You could use Yast's search function in the software installation menu.

  5. #5

    Thumbs up Re: Hardening SUSE LInux 11.1 - questions

    Thanks for the references to the self-study material already present in my Open Suse installation

    Question:
    1. Are their any more sources on a default Suse installation that i can look into myself? (besides the man man command)


    Regards, Ronald

  6. #6
    Join Date
    Feb 2010
    Location
    Germany
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    4,654

    Default Re: Hardening SUSE LInux 11.1 - questions

    ronaldvermeij wrote:

    >
    > QUESTION:
    > 1. Are their any more sources on a default Suse installation that i can
    > look into myself? (besides the man man command)
    >

    This is a very general question, have you looked at the official pdf manuals
    from novell?

    http://www.novell.com/documentation/opensuse112/

    esp. ReferenceGuide and Security Guide





  7. #7
    palladium NNTP User

    Default Re: Hardening SUSE LInux 11.1 - questions

    ronaldvermeij wrote:
    > 1. Are their any more sources on a default Suse installation that i can
    > look into myself?


    try wandering around in /usr/share/doc in the browser of your choice
    (take a bottle of water and a pillow)

    and, if don't find there all you need then have a look at one of my
    previous postings on documentation: http://tinyurl.com/ybklh48

    --
    palladium

  8. #8

    Thumbs up Re: Hardening SUSE LInux 11.1 - questions

    Thanks Martin for pointing me to those manuals.. I did not have discovered them yet :-) and I'm downloading them right now.


    Question:
    1. What is the usual "Linux community way" to walk when
    man <something>
    does return the error "there is no man pages for this item?
    A - "Post my question in Open Suse forums (and get referred back to a non existing manual page?")
    B - "Fire up browser and keep googling for the answer?"
    C - The other option ??
    D - The next option ??


    2. Are there any more "fountains / sources of 100 % pure Suse Linux knowledge" online.
    So I can look and learn my own Open Suse Linux related answers?


    Thanks for your willingness, effort and time to help me get around in Open Suse Linux land

    Regards, Ronald

  9. #9

    Default Re: Hardening SUSE LInux 11.1 - questions

    @Voodoo:
    2. You could use Yast's search function in the software installation menu.
    This does not always help me to learn more about a certain service. Sometimes the description is very crappy and does not contribute to a meaningfull insight of the function of that software / service installed on your computer system.

    To show you what i mean.. here are some example of this "crappyness"
    Start -> Yast -> System Services
    -> a11y -> this enables a11y support on livecd's
    -> brld -> starts brld the braille service
    -> fbsetup -> Framebuffer setup
    -> raw -> raw devices
    -> sbl -> start suse-blinux


    Simple "oneliners as comment" that give me no clue to their functionality
    or wether i can turn this service on,off without endangering my computers operational stablility....

    Question
    Is there, do you know a "Open Suse Linux services dependency tree" / documentation, which can provide me insight in
    - which services depend on which other services
    - which services i do not need (from the default installation)
    - which services can be safely turned off in order to gain more speeds, cpupower, security?

    I have already found the /etc/rcd.X/ABCDEFA...files in which i can read the following information

    ### BEGIN INIT INFO
    # Provides:
    # Required to start:
    # Should start
    # Should stop
    # Short Description:
    ### END INIT INFO

    Thanks for you answers, Ronald

  10. #10

    Default Re: Hardening SUSE LInux 11.1 - questions

    No i can find the linux answers myself again :-)
    THAT was EXACTLY what i was searching for!

    Thank you, Thank you, Thank you very much Palladium...
    Regards, Ronald

    "Just show me the path to the manual, and i assimilate it myself"

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