Charles Li wrote:
--- Rick Stevens <rstevens@xxxxxxxxxxxxxxx> wrote:
Charles Li wrote:
--- Rick Stevens <rstevens@xxxxxxxxxxxxxxx> 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@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@xxxxxxxxxxxxxxx -
- VitalStream, Inc. http://www.vitalstream.com -
- -
- Denial. It ain't just a river in Egypt anymore! -
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