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Old 03-02-2014, 03:52 AM   #1
rblampain
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Registered: Aug 2004
Location: Western Australia
Distribution: Debian 9.2
Posts: 1,149

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ssh_exchange_identification: read: Connection reset by peer


I get the message above after installing Debian 7 although I thought I have been able to connect since.

Here are the messages:
rene@asus:~$ ssh -v root@173.0.55.170
OpenSSH_6.0p1 Debian-4, OpenSSL 1.0.1e 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 173.0.55.170 [173.0.55.170] port 22.
debug1: Connection established.
debug1: identity file /home/rene/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/rene/.ssh/id_rsa-cert type -1
debug1: identity file /home/rene/.ssh/id_dsa type -1
debug1: identity file /home/rene/.ssh/id_dsa-cert type -1
debug1: identity file /home/rene/.ssh/id_ecdsa type -1
debug1: identity file /home/rene/.ssh/id_ecdsa-cert type -1
ssh_exchange_identification: read: Connection reset by peer

And here is the /etc/ssh/ssh_config:
Host *
# ForwardAgent no
# ForwardX11 no
# ForwardX11Trusted yes
# RhostsRSAAuthentication no
# RSAAuthentication yes
# PasswordAuthentication yes
# HostbasedAuthentication no
# GSSAPIAuthentication no
# GSSAPIDelegateCredentials no
# GSSAPIKeyExchange no
# GSSAPITrustDNS no
# BatchMode no
# CheckHostIP yes
# AddressFamily any
# ConnectTimeout 0
# StrictHostKeyChecking ask
# IdentityFile ~/.ssh/identity
# IdentityFile ~/.ssh/id_rsa
# IdentityFile ~/.ssh/id_dsa
# Port 22
# Protocol 2,1
# Cipher 3des
# Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc
# MACs hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160
# EscapeChar ~
# Tunnel no
# TunnelDevice any:any
# PermitLocalCommand no
# VisualHostKey no
# ProxyCommand ssh -q -W %h:%p gateway.example.com
SendEnv LANG LC_*
HashKnownHosts yes
GSSAPIAuthentication yes
GSSAPIDelegateCredentials no

I have no idea what the problem could be, can anyone help?

Thank you for your help.

Last edited by rblampain; 03-02-2014 at 04:00 AM.
 
Old 03-02-2014, 12:57 PM   #2
lleb
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Registered: Dec 2005
Location: Florida
Distribution: CentOS/Fedora
Posts: 2,735

Rep: Reputation: 518Reputation: 518Reputation: 518Reputation: 518Reputation: 518Reputation: 518
check your local and remote permissions. to see more read the links in my sig.
 
Old 03-02-2014, 11:38 PM   #3
rblampain
Senior Member
 
Registered: Aug 2004
Location: Western Australia
Distribution: Debian 9.2
Posts: 1,149

Original Poster
Rep: Reputation: 51
With the -vvv switch I had a complaint (which I did not record) about the key so I adjusted /etc/ssh/ssh_config as per your instructions (plus what was already uncommented):
Host *
ForwardAgent yes
ForwardX11 yes
ServerAliveInterval 30
TCPKeepAlive yes
SendEnv LANG LC_*
HashKnownHosts yes
GSSAPIAuthentication yes
GSSAPIDelegateCredentials no
ServerAliveCountMax 5

and I deleted the existing keys, then created a new one as per your instructions, however trying to copy it to the remote did not work as shown below:
rene@asus:~$ ssh-copy-id -vvv -i ~/.ssh/id_rsa.pub root@173.0.55.120 25
OpenSSH_6.0p1 Debian-4, OpenSSL 1.0.1e 11 Feb 2013
Pseudo-terminal will not be allocated because stdin is not a terminal.
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
ssh: Could not resolve hostname umask 077; test -d ~/.ssh || mkdir ~/.ssh ; cat >> ~/.ssh/authorized_keys && (test -x /sbin/restorec: Name or service not known

It is still all behond my ability, can you help?

PS I now have an unwanted rsa_pub on the remote.

Thank you.
 
Old 03-03-2014, 02:51 AM   #4
lleb
Senior Member
 
Registered: Dec 2005
Location: Florida
Distribution: CentOS/Fedora
Posts: 2,735

Rep: Reputation: 518Reputation: 518Reputation: 518Reputation: 518Reputation: 518Reputation: 518
you can remove unwanted rsa_pub manually, also you can transfer the id.rsa_pub manually as shown in my links. the copy-ssh-id is a script to perform the same task as you can perform manually as per my link instructions.
 
  


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