Ubuntu: SSH problems (ssh_exchange_identification: read: Connection reset by peer)



Question:

I was running 11.10 and decided to do the full upgrade and come up to 12.04 after the update SSH (not SSHD) is now misbehaving when attempting to connect to other OpenSSH instances. I say OpenSSH as I am running a DropBear sshd on my router and I am able to connect to it.

When attempting to connect to an OpenSSH server

risk@skynet:~/.ssh$ ssh -vvv risk@someserver  OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012  debug1: Reading configuration data /home/risk/.ssh/config  debug3: key names ok: [ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss]  debug1: Reading configuration data /etc/ssh/ssh_config  debug1: /etc/ssh/ssh_config line 19: Applying options for *  debug2: ssh_connect: needpriv 0  debug1: Connecting to someserver [someserver] port 22.  debug1: Connection established.  debug1: identity file /home/risk/.ssh/id_rsa type -1  debug1: identity file /home/risk/.ssh/id_rsa-cert type -1  debug1: identity file /home/risk/.ssh/id_dsa type -1  debug1: identity file /home/risk/.ssh/id_dsa-cert type -1  debug3: Incorrect RSA1 identifier  debug3: Could not load "/home/risk/.ssh/id_ecdsa" as a RSA1 public key  debug1: identity file /home/risk/.ssh/id_ecdsa type 3  debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-521  debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-521  debug1: identity file /home/risk/.ssh/id_ecdsa-cert type -1  ssh_exchange_identification: read: Connection reset by peer  risk@skynet:~/.ssh$  

DropBear instance

risk@skynet:~/.ssh$ ssh -vvv root@darkness  OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012  debug1: Reading configuration data /home/risk/.ssh/config  debug3: key names ok: [ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss]  debug1: Reading configuration data /etc/ssh/ssh_config  debug1: /etc/ssh/ssh_config line 19: Applying options for *  debug2: ssh_connect: needpriv 0  debug1: Connecting to darkness [192.168.1.1] port 22.  debug1: Connection established.  debug1: identity file /home/risk/.ssh/id_rsa type -1  debug1: identity file /home/risk/.ssh/id_rsa-cert type -1  debug1: identity file /home/risk/.ssh/id_dsa type -1  debug1: identity file /home/risk/.ssh/id_dsa-cert type -1  debug3: Incorrect RSA1 identifier  debug3: Could not load "/home/risk/.ssh/id_ecdsa" as a RSA1 public key  debug1: identity file /home/risk/.ssh/id_ecdsa type 3  debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-521  debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-521  debug1: identity file /home/risk/.ssh/id_ecdsa-cert type -1  debug1: Remote protocol version 2.0, remote software version dropbear_0.52  debug1: no match: dropbear_0.52  ...  

I have googled and ran most ALL fixes recommend both from the Debian and Arch sides and none of them seem to resolve my issue. Any ideas?


Solution:1

Looks like I may have tracked this down to a network device no longer being sane.


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