Re: intermittent ssh connect error

Paul Archer wrote:
> We've got set of servers that use AFD (http://www.dwd.de/AFD) to scp files
> to a set of receiving servers. There are about 25 sending machines, and 12
> receiving machines. All the servers are RHEL 4 and 5, with the senders
> running openssh 4.3p2, and the receivers running 3.9p1.
>
> Most files are sent without a problem, but on a pretty regular basis, we
> get "ssh_exchange_identification: Connection closed by remote host" in our
> log files on the senders.
> The odd/interesting thing is that while that error often shows up on a
> connection to one machine, we also get bursts, where the error happens on
> connections to several different machines at once. That leads us to think
> it's an issue on the sending side, rather than the receiving side.

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.

--
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4 37C9 C982 80C7 8FF4 FA69
Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.
_______________________________________________
openssh-unix-dev mailing list
openssh-unix-dev@mindrot.org
https://lists.mindrot.org/mailman/li...enssh-unix-dev