SSH Problem on HP box - ssh:Name or service not known

[Reshma Malusare]

Hello Experts,

While connecting to server via ssh, i observed below error:

ssh -l username servername
ssh: servername: Name or service not known

Please, suggest what is the solution to overcome this problem and get ssh connection to server.

[Steven E. Protter]

Shalom,

swlist -l product | grep -i secure

You should see a product called secure shell, which is openssh.

/sbin/init.d/secsh start

On the target machine if its an HP-UX system.

SEP

[Reshma Malusare]

Hello,

I checked on the server. there is no problem. sshd is daemon is running fine.

My question is

when i do ssh with hostname its giving me error, but when i do ssh with ip address its sucessful.

It must be problem with name resolutin service. I tried to check, but didnt find anything.

My nsswitch conf file is having below entry:

#hosts: db files ldap nis dns
hosts: files dns

[Ivan Krastev]

SSH use reverse dns to check incoming requests.
You can disable it in sshd_conf file on the server :

UseDNS no


regards,
ivan

[Reshma Malusare]

Hello,

Thanks for reply.

The server from where i am doing ssh to HP box is linux server.

Can your provide me the complete path of sshd_config.

ALso step was procedure of solution to this issue.

[Ivan Krastev]

In Linux - /etc/ssh/sshd_config
HP-UX - /etc/opt/ssh/sshd-config

Check also name resolutions - target host should be resolved from source host.

regards,
ivan

[Jeeshan]

Hi Reshma

did you try IP instead of servername?

Are you running a local DNS that maps your server IP to , or do you have in your /etc/hosts file? Can you do this?
#ping

If the answer to both is no, then you can only ssh by IP address.