login failure

abhay1983 · 02-29-2012, 10:23 PM

Hi please clarify the below query.

User is unable to get the prompt when login to the putty.

It's showing blank screen.

On checking the user account is valid one.

Thanks !

deep27ak · 03-01-2012, 12:24 AM

By prompt screen what do you mean?
you are not getting a login prompt?

check your firewall settings whether your server is listening to port 22

Code:

#netstat -ntlp | grep 22

abhay1983 · 03-01-2012, 01:02 AM

Q- User is trying to connect a server through putty. after that user didn't get the login prompt. it's showing blank screen. Even the cursor is also not blinking....

yes. ports are in listening mode, and user is having right access to the server. password is not expired/locked.

deep27ak · 03-01-2012, 01:08 AM

post your iptables rule

Code:

#iptables --list

check status of selinux

abhay1983 · 03-01-2012, 02:54 AM

deep27ak,

This question was asked in interview.

i said check whether the password is expired/locked or not. and i informed to check the .ICE files on user's home directory.

but he was not satisfied.

deep27ak · 03-01-2012, 03:08 AM

if you are not getting login prompt simply means you are not getting access to the system. It has nothing to do with user's password

the issue is with firewall or selinux for sure

to check you can try on your test machine

Code:

#iptables -A INPUT -p tcp --dport 22 -j REJECT
#service iptables save
#service iptables restart

and try to connect through putty..it will say unable to connect

then try the same thing after stopping the firewall or adding a ACCEPT rule for port 22.

abhay1983 · 03-01-2012, 04:33 AM

Thanks very much deep27ak fro your update.