how to setup fc3 to ssh from remote server

[Rick Stevens]

Charles Li wrote:
> --- Rick Stevens <rstevens at vitalstream.com> wrote:
> 
>>Charles Li wrote:
>>
>>>--- Rick Stevens <rstevens at vitalstream.com> wrote:
>>>
>>>
>>>>Charles Li wrote:
>>>>
>>>>
>>>>>Hi, 
>>>>>When I try to ssh in the fc3 from another server,
>>>>
>>>>it
>>>>
>>>>
>>>>>gives me this error:
>>>>>[server]$ ssh -X fc3-server
>>>>>ssh: connect to address fc3-server port 22: No
>>>>
>>>>route
>>>>
>>>>
>>>>>to host
>>>>>
>>>>>When do I need to start up?
>>>>
>>>>Is "fc3-server" in your /etc/hosts file or
>>>>resolvable via DNS?  Can
>>>>you ping it?  Do you have a default gateway
>>>>configured that can get at
>>>>it?
>>>>
>>
>>  > I can ping the fc3-server from the server (S1)
>>that I
>>
>>>can issuing the ssh.
>>
>>You didn't say if you can ping it by name or IP
>>only.  We need to know
>>that.
>>
>>
>>>fc3-server is not in the S1's /etc/hosts.
>>
>>If pinging via the IP address works, but pinging via
>>the hostname 
>>doesn't, you either need to enter the IP and
>>hostname into /etc/hosts or
>>make sure there are appropriate records in your DNS
>>service.
>>
>>
>>>How do I check whether fc3-server is resolvable
>>
>>via
>>
>>>DNS, and also the gateway?
>>
>>To check DNS, "# dig fc3-server".  See if you get an
>>address back.
>>
>>Since you can ping it one way or the other, the
>>gateway is probably OK.
> I am pinging by IP address.  This machine does not
> have a name.  Also, I am using the ip address with
> SSH.

That's not what you said before.  I quote:

"[server]$ ssh -X fc3-server
ssh: connect to address fc3-server port 22: No route to host"

> The following is the dig command output:
> 
> [oracle at epic11 oracle]$ dig 172.20.3.53

No, not right.  To see what the IP address is for host "fc3-server",
the command would be

	dig fc3-server

To find out which HOST is associated with IP address 172.20.3.53 (called
a "reverse DNS lookup", the command would be

	dig -x 172.20.3.53

(note the "-x", meaning "reverse lookup").

Since you don't have a line such as:

	172.20.3.53	fc3-server

in /etc/hosts, you should be able to do a

	ssh 172.20.3.53

to access the machine by IP address.  Or add that line to /etc/hosts
and use "ssh fc3-server".
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- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-           Denial.  It ain't just a river in Egypt anymore!         -
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