SSH weird problem

Hi Muhammad,

 

 

I think this is an issue specific to SSHD--not much of anything to do with BIG-IP. You could try searching the web for this error message. There are quite a few forum posts with troubleshooting suggestions. You could try running a new instance of sshd with debug enabled:

 

 

http://mrraph.net/WordPress/?p=16

 

 

/usr/sbin/sshd -d -p 2200

 

 

and then connect on port 2200. Or you could change the LogLevel in /config/ssh/sshd_config to debug, reload the config using kill -HUP `pidof sshd`and then retest.

 

 

Here are some related links:

 

 

 

http://archive.netbsd.se/?ml=openssh-unix-dev&a=2007-10&t=5430083

 

 

I suspect you're hitting the MaxStartups unauthenticated connection

 

limit. It default is 10, try bumping it on the servers to, say, 30 or 40.

 

 

 

 

 

http://lists.mindrot.org/pipermail/openssh-unix-dev/2008-February/026176.html

 

 

> Hi,

 

>

 

> I'm getting this error when I ssh to the servers.

 

> ssh_exchange_identification: Connection closed by remote host

 

>

 

> I added /etc/hosts.allow and it actually worked once and if I tried again I get the same error.

 

 

You did not mention whether you added by name or by IP.

 

Every time I've seen this error it has been a DNS problem. And I only

 

see this on systems that are in hosts.allow by name.

 

 

 

 

Aaron