unable to start SSH service

poma pomidorabelisima at gmail.com
Thu Mar 28 17:10:06 UTC 2013

On 28.03.2013 16:56, Bill Oliver wrote:
>> Am 28.03.2013 16:08, schrieb Suvayu Ali:
>>> On Thu, Mar 28, 2013 at 02:51:22PM +0000, Frank Murphy wrote:
>>>> On Thu, 28 Mar 2013 15:41:15 +0100
>>>> Suvayu Ali <fatkasuvayu+linux at gmail.com> wrote:
>>>>>> Upgrade to Fedora 17 or 18.
>>>>>> Is the solution
>>>>> Although that is good advice, it is definitely not a solution to the
>>>>> OP's problem.
> Sometimes its good to try to be helpful even if the person can't take
> advantage of the kneejerk obvious response.  There can be lots of
> reasons that a person can't upgrade an OS.
> For instance, I am closely affiliated with a very large multi-hospital
> group that is still running Windows XP.  Why?  The reason is that the
> healthcare software (case management, automated medical records, etc.)
> has to be approved by the Food and Drug Administration before it can be
> substantially changed, and running it on a new operating system counts
> as a substantial change.  Unfortunately, the bureaucratic and regulatory
> mess involved with validating this kind of software can take years, and
> the switch will likely cost this organization over a million dollars. 
> And of course, as soon as it's done, it will already be "obsolete."
> A few years ago, I directed a scientific laboratory that was very
> heterogeneous for similar reasons.  Many machines were dedicated to
> specific pieces of laboratory equipment, and the OS was determined by
> the needs of the software that ran the equipment, not my convenience.  I
> had one piece of equipment that required AmigaOS that we didn't
> decommission until 2008.
> While upgrading is, indeed, the best solution, it may also be
> appropriate to help people who do not have that option.
> That being said, it's hard to help without more information.  The most
> common things that have made ssh not work for me have been:
> 1) Some ssh packages come initially configured to only allow ssh to
> localhost (  Make sure that's changed in the config file if
> your package is like that.
> 2) Some initial configurations of selinux are not ssh friendly, either
> make sure that your selinix configuration allows ssh.
> 3) Is this a server or client problem?  I wasn't sure from what you
> wrote whether your problem is that people can't get to your machine to
> ssh, or if you can't get to other machines from yours.
> 4) Have you made sure this isn't a firewall/connection problem if it's a
> client issue -- perhaps the packets are getting munched by a firewall. 
> Can you get to and from other machines behind your firewall?  Can other
> machines get out through your firewall?
> 5) You don't say whether your problem is global -- you can't ssh at all
> -- or to a specific host.  Many servers don't use the standard ports,
> and you need to make sure you are pointing to the right place. 
> Similarly, you need to make sure the server is actually serving.  Can
> you connect with netcat?
> 6) If you are testing your client on your localhost as server, are you
> sure the daemon is really running?
> 7) You need to show us what your log files say.  Are you having
> authorization problems?
> 8) Is this a problem all the time or is it intermittent?
> 9) Is your problem with standard sitting-at-the-console ssh, or is it
> with automatic-with-a-cron-job, or both?

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