Login or Register to Ask a Question and Join Our Community


Red Hat

Can't SSH - Connection reset by Peer

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Operating Systems Linux Red Hat Can't SSH - Connection reset by Peer
# 1  
Old 09-27-2017
Can't SSH - Connection reset by Peer
Hi Guys,

I can't SSH to a remote system - connection reset by peer..any ideas ?
-The Source is Linux, the Remote is Windows
-The remote has OpenSSH running on Port 22 - Telnet confirms port is open
-User1 has a RSA2 Key (2048) key, which is capture in the 1010101-pub.key specified by the client (format of 1 line, rsa-key <key> user1@10.10.10.1

stuck!, any ideas ?

Code:
] test]# ssh -vvv -i ./1010101-pub.key user1@10.10.10.1
OpenSSH_6.6.1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 10.10.10.1 [10.10.10.1] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug3: Incorrect RSA1 identifier
debug3: Could not load "./10.10.10.1-pub.key" as a RSA1 public key
debug1: identity file ./10.10.10.1-pub.key type 1
debug1: identity file ./10.10.10.1-pub.key-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.5
debug1: match: OpenSSH_7.5 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug3: load_hostkeys: loading entries for host "10.10.10.1" from file "/root/.ssh/known_hosts"
debug3: load_hostkeys: loaded 0 keys
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,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-ed25519,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
...
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: setup hmac-sha1-etm@openssh.com
debug1: kex: server->client aes128-ctr hmac-sha1-etm@openssh.com none
debug2: mac_setup: setup hmac-sha1-etm@openssh.com
debug1: kex: client->server aes128-ctr hmac-sha1-etm@openssh.com none
debug1: kex: curve25519-sha256@libssh.org need=20 dh_need=20
debug1: kex: curve25519-sha256@libssh.org need=20 dh_need=20
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
Read from socket failed: Connection reset by peer

Last edited by MadeInGermany; 09-27-2017 at 06:58 PM.. Reason: added code tags, removed mail links
# 2  
Old 09-27-2017
Hi,

One thing that's possible here is some kind of mismatch in the supported ciphers between the client and server, but there are other possibilities too.

What would be useful is to get the SSH server debug output, and compare that with the client debug. On a "proper" *nix style environment you'd have to stop the sshd service and then manually run /usr/sbin/sshd -d -d -d as root at the shell prompt, and you'd then see the debug output in your terminal during the connection attempt. Once that exits, you could then start sshd as normal again.

I'm not sure exactly how that would translate into your Windows setup, but that's something I'd recommend as the next step anyway - get server-side debugging, and see if it sheds any more light on things.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Sftp - Couldn't read packet: Connection reset by peer

Hello to all, i have a problem when trying to estabilish a sftp connection. i setup a sftp server (i used feeFTPd) and i'm now trying to connect from two different machines. from the first one everything is fine: $ sftp -vvv user@xxx.xxx.xxx.xxx Connecting to xxx.xxx.xxx.xxx...... (9 Replies)
Discussion started by: dc26
9 Replies

2. UNIX for Advanced & Expert Users

Fatal: Read from socket failed: Connection reset by peer [preauth]

Hello, I have recently updated my AIX machine from version 6.1.7.5 to 6.1.9.1 and i noticed that the errpt of the server is full of ssh messages like the one below: sshdprocess_id>]: fatal: Read from socket failed: Connection reset by peer Does anyone knows if this a known bug of the ssh... (15 Replies)
Discussion started by: omonoiatis9
15 Replies

3. UNIX for Dummies Questions & Answers

Grep: writing output: Connection reset by peer

Hi , when i run , tkt=/u01/ctrlfile/tkt.tmp grep "TICKET NBR" $cdrFile | head -$count | tail -1 > $tkt i got error grep: writing output: Connection reset by peer but some time its working withour error its working fine but some time i got this error any help please (5 Replies)
Discussion started by: OTNA
5 Replies

4. UNIX for Dummies Questions & Answers

cat: write error: Connection reset by peer

I have created a script to cat the contents of a log file and pipe it to head and tail so I can get specific lines. When I do this I sometimes randomly get the error "cat: write error: Connection reset by peer". It is completely sporatic and sometimes it doesnt happen and sometimes it does... (4 Replies)
Discussion started by: atelford
4 Replies

5. UNIX for Dummies Questions & Answers

fatal: Read from socket failed: Connection reset by peer

I get this error when I log in through console: "fatal: Read from socket failed: Connection reset by peer". Can you tell me what this is and why it happens, and how to stop it? Thank you. (1 Reply)
Discussion started by: iamnew2solaris
1 Replies

6. UNIX for Advanced & Expert Users

Connection reset by peer..closing connection

Hello I'm facing the above problem while doing a performance run. I've a script which I'm launching from my windows desktop using mozilla. The script will invoke backend action on a Solaris host which in turn feeds the records to a driver located on a linux box(Cent OS). What's happening is... (1 Reply)
Discussion started by: subramanyab
1 Replies

7. IP Networking

connection reset by peer on freebsd

hi all. am running postgresql in a vm on debian server. i have some client programs connecting to the db. when i check the logs of postgresql i see "connection reset by peer" can someone help me with this issue... thanks. (1 Reply)
Discussion started by: coolatt
1 Replies

8. Shell Programming and Scripting

Connection reset by peer

hi i am connecting to a remote server using sftp protocol. i am using the command like "sftp USER01@122.10.12.45" then i got the error "Couldn't read packet: Connection reset by peer" please help its very urgent (5 Replies)
Discussion started by: Satyak
5 Replies

9. Shell Programming and Scripting

ssh - connection reset by peer

I use ssh to work on the server (OS X 10.4.x) remotely from home (Debian / OS X 10.5.3). If I leave my machine idle, I get disconnected after a couple of minutes. I get the following error message: Read from remote host "server name": Connection reset by peer Connection to "server name" closed.... (2 Replies)
Discussion started by: osxhawk
2 Replies

10. IP Networking

connection reset by peer

:confused: HI, We have 2 servers ( win 2003 + sun 5.8 ) and we run a rsh from the NT to the UNIX. The program runs a shell script on the UNIX and waits for the answer in the EOF. How ever, after period of appx 2 min there is a reply "Recv failed:Connection reset by peer". while the... (5 Replies)
Discussion started by: eyalush
5 Replies
Login or Register to Ask a Question