topic Re: Unable to connect using Telnet and FTP in Operating System - HP-UX

Unable to connect using Telnet and FTP

trilok_pvp — Tue, 03 Nov 2009 09:09:07 GMT

Hi,

FTP and Telnet is not working in remote hp unix server. Upto yesterday its working fine. Suddenly its not working, But i am able to ping the server.

Re: Unable to connect using Telnet and FTP

Burak Topal — Tue, 03 Nov 2009 09:18:52 GMT

Who is the sys admin? if you are not, ask admin about services disabled or not.

Ä°f you can ssh to server check these services in etc/inetd.conf.

Re: Unable to connect using Telnet and FTP

Johnson Punniyalingam — Tue, 03 Nov 2009 09:21:35 GMT

Can you try ssh ?

was there any security settings has been done ?

or you try login to remote console for remote hp unix server

Re: Unable to connect using Telnet and FTP

trilok_pvp — Tue, 03 Nov 2009 09:23:54 GMT

Hi,

No changes done at security level.

Upto yesterday, its working fine.

SSH is not working, I tried to connect it from remote hp unix server to the server. its not working

Re: Unable to connect using Telnet and FTP

Johnson Punniyalingam — Tue, 03 Nov 2009 09:30:10 GMT

>>SSH is not working, I tried to connect it from remote hp unix server to the server. its not working<<

Its point less which you tried as above

Can you access the server with Console access / ( I mean remote Console Login) ????

Re: Unable to connect using Telnet and FTP

Johnson Punniyalingam — Tue, 03 Nov 2009 09:33:34 GMT

You also need to check any of the /root file system has been full ?

Can also cause this problem, nothing much we can try you try login to Console Login either by remote console or you need go ONSITE

Re: Unable to connect using Telnet and FTP

trilok_pvp — Tue, 03 Nov 2009 09:34:55 GMT

HI

I am to logon to other remote HP unix servers. From one of the server, i tried to connect the server. i am not able logon.

root:asterix:/>telnet 192.168.10.146
Trying...
Connected to 192.168.10.146.
Escape character is '^]'.

Can u suggest any other way to connect and check the settings

Re: Unable to connect using Telnet and FTP

Burak Topal — Tue, 03 Nov 2009 09:37:25 GMT

Are u able to connect MP of the server. You may check the /root directory and services.

Re: Unable to connect using Telnet and FTP

trilok_pvp — Tue, 03 Nov 2009 09:50:47 GMT

Hi,

Can you suggest about MP,

Re: Unable to connect using Telnet and FTP

Johnson Punniyalingam — Tue, 03 Nov 2009 09:51:02 GMT

>>>>>root:asterix:/>telnet 192.168.10.146
Trying...
Connected to 192.168.10.146.
Escape character is '^]'.

Can u suggest any other way to connect and check the settings<<<<<<<<<<<

Have already suggested, looks like

could be your any of your root file system has been full , I 'am not sure because unless you have console access and you shed some light than only we suggestion lot - with out seeing the console error logs, you can't do much

Hope your understand

Re: Unable to connect using Telnet and FTP

trilok_pvp — Tue, 03 Nov 2009 10:02:01 GMT

Hi,

I will check the same with onsite people for any errors

Re: Unable to connect using Telnet and FTP

Burak Topal — Tue, 03 Nov 2009 10:03:43 GMT

I agree with Johnson, it seems like your root filesystem is full.
you have to reboot the server and login through single user mode.

http://docs.hp.com/en/A5201-96043-en/apcs02.html

Re: Unable to connect using Telnet and FTP

Bill Hassell — Tue, 03 Nov 2009 12:58:13 GMT

>>>>>>root:asterix:/>telnet 192.168.10.146
> Trying...
> Connected to 192.168.10.146.
> Escape character is '^]'.

As the messages point out, you are definitely connecting to your server, so networking is correct. But you are not getting a login prompt. That means that something is wrong with HP-UX. As mentioned, if the root filesystem (or possibly /var) is full, then the login program cannot run and you'll see nothing after the connection is made. It is also possible that runaway programs have used all memory and swap space.

In all cases, error messages about these conditions are being sent to the console but it sounds like you do not have a console connected. On virtually all models of computers that run HP-UX, there is a serial port where you can connect a terminal or a PC with terminal emulation software. For more recent models, the port is connected to a special processor called the GSP or MP or EFI. For older models (K-class, D-class and older), this is the only console interface.

For newer systems such as the rp-class and rx-class (and N-class, L-class, A-class), the console also has a network port but this must be enabled with a LAN cable and configured with an IP address.

If neither of these options are available, your only choice is to turn the power off and back on. This is not a good choice as it could corrupt filesystems (low probability) and may remove the cause of the problem without logging anything. I would strongly recommend getting a serial cable and a terminal or PC to connect to the console.

Re: Unable to connect using Telnet and FTP

Suraj K Sankari — Tue, 03 Nov 2009 13:30:44 GMT

Hi,
>>I will check the same with onsite people for any errors

If everything is ok then ask your onsite people try to connect your server through console.
when they connect the console they will see console error message see the messages and then go for solution.

Suraj

Re: Unable to connect using Telnet and FTP

Vishu — Tue, 03 Nov 2009 16:29:49 GMT

well, if there is no other way working to connect to server, then ask onsite for connecting console...and try cleaning root or try to solve the problem whatever it is.

If you can provide us with some of the console errors, then things can be worked upon to sort out the issue.

Re: Unable to connect using Telnet and FTP

trilok_pvp — Tue, 03 Nov 2009 16:50:20 GMT

Hi,

I ask the onsite Engg to check it, he is also not able to logon to the console.

Now, When i try pining to the server, its shows the message as "source quench received"

Re: Unable to connect using Telnet and FTP

Bill Hassell — Tue, 03 Nov 2009 18:10:14 GMT

> I ask the onsite Engg to check it, he is also not able to logon to the console.

What did the engineer try? A laptop? Did the engineer use the wrong cable? The correct serial cable is a null-modem or printer cable. A standard 9-pin/9-pin cable will not work. The console will always show a prompt regardless of the state of HP-UX.

> Now, When i try pinging to the server, its shows the message as "source quench received"

This indicates that the system is probably looping.

You may need to have an experienced system administrator or HP service go to the remote system and fix the problem. And since this is going into production, a top priority should be to arrange for secure remote access to the console.