topic Re: Only SSH Works in Operating System - OpenVMS

Only SSH Works

Prem Mohan — Wed, 27 Jun 2007 09:09:13 GMT

I am not able to access my servers only SSH works, I am getting the following errors from
OPCOM

%%%%%%%%%%% OPCOM 27-JUN-2007 19:33:43.95 %%%%%%%%%%%
Message from user SYSTEM on SMDB11
Event: Carrier Check Failure from: Node LOCAL:.HOME.SMDB11 CSMA-CD Station ETHERNET-1,
at: 2007-06-27-18:31:42.009+00:00Iinf
eventUid 0853BCF5-24E5-11DC-84DD-AA000400ADF5
entityUid 02DD80AE-24E5-11DC-841A-AA000400ADF5
streamUid 0972E827-24E5-11DC-8530-AA000400ADF5

It seems that there is a problem with the interface, Any help is greatly appreciated.

Prem

Re: Only SSH Works

Wim Van den Wyngaert — Wed, 27 Jun 2007 09:47:06 GMT

You are not connected to the network. Check your interface/cables/connections/switches.

Interface : show error.

Wim

Re: Only SSH Works

Steven Schweda — Wed, 27 Jun 2007 09:49:18 GMT

> I am not able to access my servers

Access how?

> only SSH works,

Huh?

> It seems that there is a problem with the
> interface

Yes, it does. It could be any part of the
hardware: the interface in the system, the
cable, the hub/switch at the other end of the
cable, and so on. You'll probably need to
change something to find the problem.

Re: Only SSH Works

Prem Mohan — Thu, 28 Jun 2007 00:22:32 GMT

Thanks Guys, I will have this checked by HP, But wondering if its an interface or a cable issue how does the SSH works.

Prem

Re: Only SSH Works

Thomas Ritter — Thu, 28 Jun 2007 00:25:17 GMT

Try using telnet to the destination host. Hope it has not been disabled. If that works look at SSH otherwise the "environment".

Re: Only SSH Works

Steven Schweda — Thu, 28 Jun 2007 08:32:23 GMT

> Access how?

Still waiting for an answer to that. Exactly
what works, and what does not work?

How many Ethernet interfaces are in the
system? Your OPCOM message looks like a
complaint from DECnet.

MCR LANCP SHOW DEVICE
TCPIP SHOW INTERFACE

If TCPIP is using one interface and DECnet is
using a different interface, that could
explain some things.

Re: Only SSH Works

Steven Schweda — Thu, 28 Jun 2007 08:49:20 GMT

And a command like:

MCR NCL SHOW CSMA-CD STATION * ALL STATUS

may tell you which interface is being used
for DECnet.

Re: Only SSH Works

Prem Mohan — Thu, 28 Jun 2007 09:16:28 GMT

Hi Steven,

Access was only through SSH and telnet was not allowing.

The output as requested.

DB11:SMSC> MCR LANCP SHOW DEVICE

Device Listing, volatile database:
Device
------
EIA0
EWA0
EWB0
DB11:SMSC>
DB11:SMSC>
DB11:SMSC> tcpip SHOW INTERFACE
Packets
Interface IP_Addr Network mask Receive Send MTU

IE0 0.0.0.0 255.0.0.0 0 124 1500
LO0 127.0.0.1 255.0.0.0 6161 6161 4096
WE0 1xx.xxx.xxx.xxx 255.255.255.0 22862 4167 1500
WE1 0 124 1500
DB11:SMSC>

DB11:SMSC> MCR NCL SHOW CSMA-CD STATION * ALL STATUS

Node 0 CSMA-CD Station ETHERNET-0
at 2007-06-28-20:11:42.570+00:00Iinf

Status

UID = C63F67EA-25AF-11DC-8409-AA000400ADF5
Communication Port = EWA
Hardware Address = 00-02-A5-C6-8E-D4
State = On
MAC Address = 00-02-A5-C6-8E-D4
Address Filters =
{
AB-00-00-01-00-00 ,
09-00-2B-02-01-00 ,
09-00-2B-02-01-01 ,
09-00-2B-00-00-04 ,
FF-FF-FF-FF-FF-FF ,
01-00-5E-00-00-01 ,
AB-00-04-00-87-87
}
Receive Mode = Normal

Node 0 CSMA-CD Station ETHERNET-1
at 2007-06-28-20:11:42.570+00:00Iinf

Status

UID = C63FB433-25AF-11DC-840B-AA000400ADF5
Communication Port = EWB
Hardware Address = 00-02-A5-C6-8E-D3
State = On
MAC Address = 00-02-A5-C6-8E-D3
Address Filters =
{
AB-00-00-01-00-00 ,
09-00-2B-02-01-00 ,
09-00-2B-02-01-01 ,
09-00-2B-00-00-04 ,
FF-FF-FF-FF-FF-FF ,
01-00-5E-00-00-01 ,
AB-00-04-00-87-87
}
Receive Mode = Normal

Re: Only SSH Works

Steven Schweda — Thu, 28 Jun 2007 10:00:36 GMT

> Access was only through SSH and telnet was
> not allowing.

So SSH works, but Telnet does not? Telnet
from where? How? What, exactly, did you do?
What, exactly, happened when you did it?

Device DECnet TCPIP
EIA0 EIA IE0
EWA0 EWA WE0
EWB0 EWB WE1

And:

[...]
Node 0 CSMA-CD Station ETHERNET-1
[...]
Communication Port = EWB
[...]

So, your OPCOM messages complaining about
ETHERNET-1 are pointing to EWB0 = WE1, but:

WE1 0 124 1500

So, you don't seem to be using that interface
for TCPIP. So, whatever is causing the OPCOM
messages may not be causing your Telnet
problem.

Is the Telnet service enabled?

TCPIP SHOW SERVICE TELNET [/FULL]

What is this interface supposed to be doing?

IE0 0.0.0.0 255.0.0.0 0 124 1500

Re: Only SSH Works

Prem Mohan — Thu, 28 Jun 2007 10:36:43 GMT

Hi Steven,

DB11:> TCPIP SHOW SERVICE TELNET /FULL

Service: TELNET
State: Enabled
Port: 23 Protocol: TCP Address: 0.0.0.0
Inactivity: 1 User_name: not defined Process: not defined
Limit: 10000 Active: 0 Peak: 1

File: not defined
Flags: Listen Rtty IPv6

Socket Opts: Keepalive Rcheck Scheck
Receive: 3000 Send: 3000

Log Opts: Actv Dactv Conn Error Logi Logo Mdfy Rjct
File: not defined

Security
Reject msg: not defined
Accept host: 0.0.0.0
Accept netw: 0.0.0.0
DB11:>

So SSH works, but Telnet does not? Telnet
from where? How? What, exactly, did you do?
What, exactly, happened when you did it?

I am using reflection to telnet to the server and while doing this I get into the syste only using SSH and not thru SSH.

But if I stop a specific application process I am able to telnet to the system.

Re: Only SSH Works

Ian Miller. — Thu, 28 Jun 2007 11:38:37 GMT

"But if I stop a specific application process I am able to telnet to the system."

Could it be that the process is attaching to the telnet port?

Do TCPIP SHOW DEVICE when that process is running and see

Re: Only SSH Works

Steven Schweda — Thu, 28 Jun 2007 13:19:58 GMT

> But if I stop a specific application
> process I am able to telnet to the system.

You wouldn't want to give away too many
details here, like which application, running
on which system.

If you really don't want to describe the
problem, what's the point in asking for help?