ssh and vsftpd are aksing password very slow.

Gil@LQ · 11-02-2012, 02:30 PM

hi,

few of my servers respond very slow to ssh. I

Quote:

t's like if i hit ssh@ip and enter, it takes around 30 sec to promt password. one of the same server which is also ftp server resonds slow. after entering credentials in filezilla and hit enter, it show password accepted but remote folders show up after 30 sec.

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why this happening. Very annoying for users. Please help me. selinux and firewall are stopped. why only for few servers.

thank you very much.

TB0ne · 11-02-2012, 02:56 PM

Quote:

Originally Posted by Gil@LQ

hi,
few of my servers respond very slow to ssh. I\ why this happening. Very annoying for users. Please help me. selinux and firewall are stopped. why only for few servers.

How can anyone help you with this, when you provide no details at all??? Version/distro of Linux on the servers? OS on the clients? Is this only between servers, or from clients to servers? What client software is being used? What did this problem start? Did it EVER work right? If so, what changes have been made recently? Network environment? ANY details AT ALL?????

Best guess? DNS problem. Otherwise, provide details and perhaps we can help. This is the same thing you were told in other threads, like this one:
http://www.linuxquestions.org/questi...ow-4175429344/

Gil@LQ · 11-03-2012, 08:05 AM

hi TB0ne,

first of sorry for no details regarding issue. But you were right issue was with DNS, squid is now working, coming to ssh i disables reverse lookup in sshd_config file, thnks for that.

Quote:

my doubt is rest of the servers also have same dns settings and why is this happned to perticular server and i have to disable reverse lookup in ssh to make it work , any reason.

details
1. between both servers and clients like xp via putty.
2.CentOS 6.3
3.No changes ever since os installed

Thanks.