How to use Putty connect to Ubuntu?

[kobold3012]

I have 2 computer: 1 computer install ubuntu v9.10, in this computer already installed openssh-server and openssh-client, and 1 computer install windows. In computer with windows , i used putty connect to computer with ubuntu, but i can't connect. I don't understand what's error.
In the Putty , i configured:
IP : IP address of computer Ubuntu.
Port 22
Connection Type SSH

This is error: "Network Error: Software caused connection abort"

In computer with windows, i can ping computer with ubuntu and in computer with ubuntu i can ping computer with windows.

I already checked computer with ubuntu :
- /etc/ssh/sshd_config: in this file port 22, PermitRootLogin yes...

And in this machine installed with openssh-server, and openssh-client. But in this time, this error is maintaining, i don't find idea to fix this error.

[reed9]

Check the file /etc/hosts.allow

It is likely you need to specifically allow your windows client to connect to your server. The simplest and least secure form would be to put

sshd: ALL

But you could put that in there as a test. If it works, you know that was the problem and you can change it to something more secure.

hosts.allow - Linux Command - Unix Command
Keeping SSH access secure

[kobold3012]

Thanks for your reply, but now it doesn't work !

In my auth.log this is error:

error: ssh_selinux_getctxbyname: Failed to get default SELinux security context for kobold
error: ssh_selinux_setup_exec_context: Failed to set SELinux execution context for kobold

i don't understand this error, and how can fix it? Can you give some idea?

[kobold3012]

Who have got any idea? Can give me ,plz! This problem i can't fix it

[bigtomrodney]

PermitRootLogin yes

Logging in as root is a terrible idea generally - have you tested with regular users?

[kesey]

Are your computers connected via a router?

If yes, on your Ubuntu computer open a terminal and enter ifconfig
Take a note of the ipaddress. Let's say it is 192.168.1.5

On your windows computer, open a command prompt and type ipconfig.
Take a note of the ipaddress. Let's say it is 192.168.1.7

Ping 192.168.1.5
Do you get a response?

open putty on your windows computer
ssh your_ubuntu_username@192.168.1.5
enter your ubuntu password

Are you connected yet?

[scathefire]

so if you disable selinux does it fix your problem?

setenforce permissive

[simha]

yes disable SElinux or set it on permissive mode as mentioned above ,would permit ssh access to your machine

--Sims

[kobold3012]

Logging in as root is a terrible idea generally - have you tested with regular users?

I have known that logging in as root is terrible, but i only connect with user root, user kobold in group admin , i don't understand what's happen?

Are your computers connected via a router?

If yes, on your Ubuntu computer open a terminal and enter ifconfig
Take a note of the ipaddress. Let's say it is 192.168.1.5

On your windows computer, open a command prompt and type ipconfig.
Take a note of the ipaddress. Let's say it is 192.168.1.7

Ping 192.168.1.5
Do you get a response?

open putty on your windows computer
ssh your_ubuntu_username@192.168.1.5
enter your ubuntu password

Are you connected yet?

With 2 computers , i can ping normally ,but i haven't used putty to connect computer ubuntu

so if you disable selinux does it fix your problem?

setenforce permissive

yes disable SElinux or set it on permissive mode as mentioned above ,would permit ssh access to your machine

--Sims

i will try to disable selinux, thanks !

[kobold3012]

so if you disable selinux does it fix your problem?

setenforce permissive

I used

setenforce permissive

but error has maintained, how to disable selinux????