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Why is my SSH connection being closed immediately after pubkey auth succeeds?
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I've two windows machine and trying to SSH using CYGWIN. It works fine when password prompted. However, when I generated the private/public pair, looks like authentication succeeded, but got the connection closed error.
Here's the detail logs: Please help
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/502537203/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug1: Authentication succeeded (publickey).
Authenticated to hostname ([x.x.x.x]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: send packet: type 1
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t3 r-1 i0/0 o0/0 fd 4/5 cc -1)
Connection to hostname closed by remote host.
Connection to hostname closed.
Transferred: sent 2056, received 1500 bytes, in 0.0 seconds
debug1: Exit status -1
ssh sshd cygwin
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
asked Nov 16 '16 at 18:33
KamalKamal
6116
|
show 1 more comment
I've two windows machine and trying to SSH using CYGWIN. It works fine when password prompted. However, when I generated the private/public pair, looks like authentication succeeded, but got the connection closed error.
Here's the detail logs: Please help
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/502537203/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug1: Authentication succeeded (publickey).
Authenticated to hostname ([x.x.x.x]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: send packet: type 1
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t3 r-1 i0/0 o0/0 fd 4/5 cc -1)
Connection to hostname closed by remote host.
Connection to hostname closed.
Transferred: sent 2056, received 1500 bytes, in 0.0 seconds
debug1: Exit status -1
ssh sshd cygwin
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
asked Nov 16 '16 at 18:33
KamalKamal
6116
I generated this log via ssh -vvv to the remote server and also placed the authorized_keys as well
– Kamal
Nov 16 '16 at 18:34
1
You're doing your part just fine, it's the remote server that closes the connection. Look at the logs of the remote machine.
– Satō Katsura
Nov 16 '16 at 18:42
In which location of the server, I need to check for logs.
– Kamal
Nov 16 '16 at 19:11
Check undercygwinvarlogmessages
– stark
Nov 16 '16 at 19:14
I've only below four files under /var/log -> setup.log, setup.log.full, sshd.log (no data), lastlog (huge data). Which one to check?
– Kamal
Nov 16 '16 at 19:22
|
show 1 more comment
I've two windows machine and trying to SSH using CYGWIN. It works fine when password prompted. However, when I generated the private/public pair, looks like authentication succeeded, but got the connection closed error.
Here's the detail logs: Please help
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/502537203/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug1: Authentication succeeded (publickey).
Authenticated to hostname ([x.x.x.x]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: send packet: type 1
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t3 r-1 i0/0 o0/0 fd 4/5 cc -1)
Connection to hostname closed by remote host.
Connection to hostname closed.
Transferred: sent 2056, received 1500 bytes, in 0.0 seconds
debug1: Exit status -1
ssh sshd cygwin
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
asked Nov 16 '16 at 18:33
KamalKamal
6116
I've two windows machine and trying to SSH using CYGWIN. It works fine when password prompted. However, when I generated the private/public pair, looks like authentication succeeded, but got the connection closed error.
Here's the detail logs: Please help
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/502537203/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug1: Authentication succeeded (publickey).
Authenticated to hostname ([x.x.x.x]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: send packet: type 1
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t3 r-1 i0/0 o0/0 fd 4/5 cc -1)
Connection to hostname closed by remote host.
Connection to hostname closed.
Transferred: sent 2056, received 1500 bytes, in 0.0 seconds
debug1: Exit status -1
ssh sshd cygwin
ssh sshd cygwin
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
asked Nov 16 '16 at 18:33
KamalKamal
6116
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
asked Nov 16 '16 at 18:33
KamalKamal
6116
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
edited Nov 16 '16 at 18:40
jayhendren
5,49721646
5,49721646
asked Nov 16 '16 at 18:33
KamalKamal
6116
asked Nov 16 '16 at 18:33
KamalKamal
6116
asked Nov 16 '16 at 18:33
KamalKamal
6116
6116
I generated this log via ssh -vvv to the remote server and also placed the authorized_keys as well
– Kamal
Nov 16 '16 at 18:34
1
You're doing your part just fine, it's the remote server that closes the connection. Look at the logs of the remote machine.
– Satō Katsura
Nov 16 '16 at 18:42
In which location of the server, I need to check for logs.
– Kamal
Nov 16 '16 at 19:11
Check undercygwinvarlogmessages
– stark
Nov 16 '16 at 19:14
I've only below four files under /var/log -> setup.log, setup.log.full, sshd.log (no data), lastlog (huge data). Which one to check?
– Kamal
Nov 16 '16 at 19:22
|
show 1 more comment
I generated this log via ssh -vvv to the remote server and also placed the authorized_keys as well
– Kamal
Nov 16 '16 at 18:34
1
You're doing your part just fine, it's the remote server that closes the connection. Look at the logs of the remote machine.
– Satō Katsura
Nov 16 '16 at 18:42
In which location of the server, I need to check for logs.
– Kamal
Nov 16 '16 at 19:11
Check undercygwinvarlogmessages
– stark
Nov 16 '16 at 19:14
I've only below four files under /var/log -> setup.log, setup.log.full, sshd.log (no data), lastlog (huge data). Which one to check?
– Kamal
Nov 16 '16 at 19:22
I generated this log via ssh -vvv to the remote server and also placed the authorized_keys as well
– Kamal
Nov 16 '16 at 18:34
I generated this log via ssh -vvv to the remote server and also placed the authorized_keys as well
– Kamal
Nov 16 '16 at 18:34
1
1
You're doing your part just fine, it's the remote server that closes the connection. Look at the logs of the remote machine.
– Satō Katsura
Nov 16 '16 at 18:42
You're doing your part just fine, it's the remote server that closes the connection. Look at the logs of the remote machine.
– Satō Katsura
Nov 16 '16 at 18:42
In which location of the server, I need to check for logs.
– Kamal
Nov 16 '16 at 19:11
In which location of the server, I need to check for logs.
– Kamal
Nov 16 '16 at 19:11
Check under
cygwinvarlogmessages– stark
Nov 16 '16 at 19:14
Check under
cygwinvarlogmessages– stark
Nov 16 '16 at 19:14
I've only below four files under /var/log -> setup.log, setup.log.full, sshd.log (no data), lastlog (huge data). Which one to check?
– Kamal
Nov 16 '16 at 19:22
I've only below four files under /var/log -> setup.log, setup.log.full, sshd.log (no data), lastlog (huge data). Which one to check?
– Kamal
Nov 16 '16 at 19:22
|
show 1 more comment
2 Answers
2
active
oldest
votes
It's working now. I did the following
- set the permission for ~/.ssh 700
- all the files under ~/.ssh 600
- run the sshd service as cyg_server id (created during ssh-host-config)
- edited /etc/sshd_config to allow PubkeyAuthentication yes
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
answered Nov 18 '16 at 20:39
KamalKamal
6116
add a comment |
Incompatible ciphers can get negotiated. Try this:
ssh -oCiphers=aes128-ctr user@host
http://developer.toradex.com/knowledge-base/ssh#incompatible-cipher-support
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
It's working now. I did the following
- set the permission for ~/.ssh 700
- all the files under ~/.ssh 600
- run the sshd service as cyg_server id (created during ssh-host-config)
- edited /etc/sshd_config to allow PubkeyAuthentication yes
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
answered Nov 18 '16 at 20:39
KamalKamal
6116
add a comment |
It's working now. I did the following
- set the permission for ~/.ssh 700
- all the files under ~/.ssh 600
- run the sshd service as cyg_server id (created during ssh-host-config)
- edited /etc/sshd_config to allow PubkeyAuthentication yes
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
answered Nov 18 '16 at 20:39
KamalKamal
6116
add a comment |
It's working now. I did the following
- set the permission for ~/.ssh 700
- all the files under ~/.ssh 600
- run the sshd service as cyg_server id (created during ssh-host-config)
- edited /etc/sshd_config to allow PubkeyAuthentication yes
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
answered Nov 18 '16 at 20:39
KamalKamal
6116
It's working now. I did the following
- set the permission for ~/.ssh 700
- all the files under ~/.ssh 600
- run the sshd service as cyg_server id (created during ssh-host-config)
- edited /etc/sshd_config to allow PubkeyAuthentication yes
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
answered Nov 18 '16 at 20:39
KamalKamal
6116
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
edited 7 hours ago
Rui F Ribeiro
42.1k1484142
42.1k1484142
answered Nov 18 '16 at 20:39
KamalKamal
6116
answered Nov 18 '16 at 20:39
KamalKamal
6116
answered Nov 18 '16 at 20:39
KamalKamal
6116
6116
add a comment |
add a comment |
Incompatible ciphers can get negotiated. Try this:
ssh -oCiphers=aes128-ctr user@host
http://developer.toradex.com/knowledge-base/ssh#incompatible-cipher-support
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
add a comment |
Incompatible ciphers can get negotiated. Try this:
ssh -oCiphers=aes128-ctr user@host
http://developer.toradex.com/knowledge-base/ssh#incompatible-cipher-support
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
add a comment |
Incompatible ciphers can get negotiated. Try this:
ssh -oCiphers=aes128-ctr user@host
http://developer.toradex.com/knowledge-base/ssh#incompatible-cipher-support
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
Incompatible ciphers can get negotiated. Try this:
ssh -oCiphers=aes128-ctr user@host
http://developer.toradex.com/knowledge-base/ssh#incompatible-cipher-support
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
answered Jul 19 '17 at 5:38
Tim OlsonTim Olson
91
91
add a comment |
add a comment |
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I generated this log via ssh -vvv to the remote server and also placed the authorized_keys as well
– Kamal
Nov 16 '16 at 18:34
1
You're doing your part just fine, it's the remote server that closes the connection. Look at the logs of the remote machine.
– Satō Katsura
Nov 16 '16 at 18:42
In which location of the server, I need to check for logs.
– Kamal
Nov 16 '16 at 19:11
Check under
cygwinvarlogmessages– stark
Nov 16 '16 at 19:14
I've only below four files under /var/log -> setup.log, setup.log.full, sshd.log (no data), lastlog (huge data). Which one to check?
– Kamal
Nov 16 '16 at 19:22