[linux-help] Re: Protocols running?

["Ace" <kryste01@xxxxxxx>]

Thanks again.  I see what you're saying about OpenSSH just being the 
connection software.  Our Security/Compliance people are clueless.
----- Original Message ----- 
From: "Steven Saner" <ssaner@xxxxxxxxxxxxxxx>
To: <linux-help@xxxxxxxxx>
Sent: Thursday, June 01, 2006 1:38 PM
Subject: [linux-help] Re: Protocols running?


> Ace wrote:
>> OK, I'll check it out.  So to see what's currently running I use ps or 
>> top?
>> Thanks!
>
> Another thing you can do is type the command netstat -a. Look for the 
> lines that
> have LISTEN under the State column (netstat -a | grep LISTEN might be 
> useful).
> This will tell you what services are listening. Another way to say that is 
> that
> it will tell you want protocols for which your computer will accept 
> connections.
>
> Steve
>
>
>> ----- Original Message ----- 
>> From: "Jonathan Hall" <flimzy@xxxxxxxxxx>
>> To: <linux-help@xxxxxxxxx>
>> Sent: Thursday, June 01, 2006 12:51 PM
>> Subject: [linux-help] Re: Protocols running?
>>
>>
>>> I'm not exactly sure what you're looking for... You probably mean what
>>> daemons are running, and what versions they are.  Although most 
>>> protocols
>>> do have versions, the versions change very very rarely, and there are 
>>> many
>>> programs that use the same version of the protocol, and many programs 
>>> use
>>> multiple protocols.  Since you mentioned SSH, for instance, I'll use 
>>> that
>>> as an example.  There are two (common) SSH protocols... SSH version 1, 
>>> and
>>> SSH version 2.  Any modern version of OpenSSH can use both protocol
>>> versions (although version 2 is prefered nowdays, as its more secure).
>>>
>>> OpenSSH is not the only program that uses SSH, though.  There's also the
>>> "standard" version of SSH (which is nowdays used less frequently than
>>> OpenSSH), and there are also SSH servers and clients available from many
>>> other vendors.  Which protocols these servers and clients use will
>>> obviously vary by the vendor.  putty is a common SSH client for Windows.
>>> It supports both SSH protocols v1 and v2, as well as telnet, and 
>>> probably
>>> rsh and other protocols as well.
>>>
>>> I suspect what you want to know is how to tell which daemons (servers) 
>>> are
>>> running on your machine.  Although there is no single file that can
>>> possibly tell you this, one place to look is /etc/inetd.conf.  This will
>>> (generally) tell you which programs are set to run as services.  It is
>>> also possible to run a daemon in... well... daemon mode.  In which case
>>> it's running constantly, and won't show up in that file.  This is more
>>> common nowdays than it was way-back-in-the-day when computer systems had
>>> very little memory, so having a daemon running all the time was a waste 
>>> of
>>> memory.  To see what programs are running at the moment (including
>>> daemons) something like 'top' or 'ps' are probably your best bet.
>>>
>>> I hope this helps.
>>>
>>> -- Jonathan
>>>
>>>
>>>> Hi,
>>>> Does someone know what file is used to configure protocols that run on
>>>> Linux
>>>> and how to check if they are runnning and their current version?  I am
>>>> running Red Hat 7.2 on an EMC Celerra network attached storage box and
>>>> I'm
>>>> trying to see if OpenSSH and RPC are running, and their versions.
>>>> Thanks!
>>>> Adam
>>>>
>>>>
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>>
>>
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>
>
> -- 
> --------------------------------------------------------------------------
> Steven Saner <ssaner@xxxxxxxxxxxxxxx>
>
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