Arch Linux

gholen

Member

From: Göteborg

Registered: 2011-07-26

Posts: 73

Website

OpenSSH, SSH_Exchange_identification: Connection closed by remote host

Long story short. Did a reinstall of the whole system. I've done my googleing, my searthes on the board (bbs.archlinux.org) and yet no luck.

As it is. The machine IS connected to the internet through a router (ports open, and ssh allowed, running DD-WRT). The machine is updated. Main problem is I cant SSH. I really need SSH, as it allows me to make changes and so.

All I get is :

gholen@darkstar: ssh -v localhost
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to localhost [::1] port 22
debug1: Connection established.
debug1: identity file /home/xxx/.ssh/id_rsa type -1
debug1: identity file /home/xxx/.ssh/id_rsa-cert type -1
debug1: identity file /home/xxx/.ssh/id_dsa type -1
debug1: identity file /home/xxx/.ssh/id_dsa-cert type -1
debug1: identity file /home/xxx/.ssh/id_ecdsa type -1
debug1: identity file /home/xxx/.ssh/id_ecdsa-cert type -1
ssh_exchange_identification: Connection closed by remote host

EDIT

Did a COMPLETE clensing of leftovers, reinstalled openssh, no luck there
I've done just about everything in the wiki too. Halp?

Last edited by gholen (2013-02-11 16:15:46)

chris_l

Member

Registered: 2010-12-01

Posts: 390

Re: OpenSSH, SSH_Exchange_identification: Connection closed by remote host

check http://edoceo.com/notabene/ssh-exchange-identification

And, you did rebooted after updating, right? Your hard disk is not full?

---

"open source is about choice"
No.
Open source is about opening the source code complying with this conditions, period. The ability to choose among several packages is just a nice side effect.

gholen

Member

From: Göteborg

Registered: 2011-07-26

Posts: 73

Website

Re: OpenSSH, SSH_Exchange_identification: Connection closed by remote host

check http://edoceo.com/notabene/ssh-exchange-identification

And, you did rebooted after updating, right? Your hard disk is not full?

Total reinstall, meaning I dont have anything left but the new install

I did, however, As I got from google earlier, I see that "hosts.allow" and "hosts.deny" is no longer needed. So that don't solve the problem

kpiche

Forum Fellow

From: Ottawa, ON, Canada

Registered: 2004-03-30

Posts: 246

Website

Re: OpenSSH, SSH_Exchange_identification: Connection closed by remote host

I have a lot of SSH keys myself so I ran into this a year ago.  It's not obvious but each key file that doesn't match counts as a login failure and the sshd default for failed login attempts, MaxAuthTries, is 6.  This is why you get disconnected after the 6th file.

You could change MaxAuthTries but I don't personally like that cause it will allows more hack attempts and you may not control the SSH server.  Also you may have problems with other servers that default to 6 as well.  A better approach is to specify the key file to use to connect to a host in the client config file, ~/.ssh/config.

Host *
    IdentityFile ~/.ssh/default-key

Host some-host
    IdentityFile ~/.ssh/other-key

More than one IdentityFile per host can be specified.  Also if you use ssh-agent the IdentitiesOnly directive may be necessary.