Comments (7)
mwiede
commented on July 18, 2024
Please use one of the loggers to show the output of the logs. My first guess is that you use ssh-rsa which is deactivated by default in the fork.
from jsch.
luca-ma
commented on July 18, 2024
I'm sorry
I don't understand which logs you are referring to and, if so, how to activate them
can you give an example?
thank you very much
from jsch.
mwiede
commented on July 18, 2024
The fork includes a few built-in loggers for various frameworks, see JplLogger, JulLogger, Log4j2Logger & Slf4jLogger.
Any of the above loggers can be enabled with the JSch.setLogger(), JSch.setInstanceLogger() or Session.setLogger() methods.
from jsch.
luca-ma
commented on July 18, 2024
Ok I've added JplLogger
private final static Logger log = new JplLogger();
....
JSch.setLogger(log);
and my test logs are as follows:
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Connecting to xx.yyy.it port 8022
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Connection established
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Remote version string: SSH-2.0-SSHD
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Local version string: SSH-2.0-JSCH_0.2.16
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: CheckCiphers: [email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: CheckKexes: [email protected],curve25519-sha256,[email protected],curve448-sha512
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: [email protected] is not available.
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: CheckSignatures: ssh-ed25519,ssh-ed448
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: ssh-ed25519 is not available.
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: ssh-ed448 is not available.
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_KEXINIT sent
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_KEXINIT received
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: ext-info messaging supported by server
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: KEX algorithms: rsa2048-sha256,diffie-hellman-group18-sha512,diffie-hellman-group17-sha512,diffie-hellman-group16-sha512,diffie-hellman-group15-sha512,diffie-hellman-group14-sha256,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp384,curve25519-sha256,[email protected],ecdh-sha2-nistp521,ecdh-sha2-nistp256,ext-info-s
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: ciphers c2s: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: ciphers s2c: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: MACs c2s: hmac-sha2-256,[email protected],hmac-sha2-512,[email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: MACs s2c: hmac-sha2-256,[email protected],hmac-sha2-512,[email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: compression c2s: none,zlib
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: compression s2c: none,zlib
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: languages c2s:
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server proposal: languages s2c:
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: KEX algorithms: curve25519-sha256,[email protected],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,ext-info-c,[email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: host key algorithms: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-512,rsa-sha2-256
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: ciphers c2s: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: ciphers s2c: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: MACs c2s: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: MACs s2c: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: compression c2s: none
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: compression s2c: none
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: languages c2s:
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: client proposal: languages s2c:
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: kex: algorithm: curve25519-sha256
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: kex: host key algorithm: rsa-sha2-512
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: kex: server->client cipher: aes128-ctr MAC: [email protected] compression: none
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: kex: client->server cipher: aes128-ctr MAC: [email protected] compression: none
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_KEX_ECDH_INIT sent
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: expecting SSH_MSG_KEX_ECDH_REPLY
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: ssh_rsa_verify: rsa-sha2-512 signature true
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
WARNING: Permanently added '[xx.yy.it]:8022' (RSA) to the list of known hosts.
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_NEWKEYS sent
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_NEWKEYS received
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_EXT_INFO sent
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_SERVICE_REQUEST sent
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_EXT_INFO received
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: server-sig-algs=<ssh-rsa,x509v3-rsa2048-sha256,rsa-sha2-256,rsa-sha2-512>
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: SSH_MSG_SERVICE_ACCEPT received
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Authentications that can continue: publickey,keyboard-interactive,password
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Next authentication method: publickey
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Authentications that can continue: keyboard-interactive,password
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Next authentication method: keyboard-interactive
Jan 20, 2024 5:00:12 PM com.jcraft.jsch.JplLogger log
INFO: Authentication succeeded (keyboard-interactive).
[24-01-20 17:00:12.424] {RMI TCP Connection(4)-192.168.56.1} Connecting to xx.yyy.it port 8022
[24-01-20 17:00:12.459] {RMI TCP Connection(4)-192.168.56.1} Connection established
[24-01-20 17:00:12.469] {RMI TCP Connection(4)-192.168.56.1} Remote version string: SSH-2.0-SSHD
[24-01-20 17:00:12.470] {RMI TCP Connection(4)-192.168.56.1} Local version string: SSH-2.0-JSCH_0.2.16
[24-01-20 17:00:12.470] {RMI TCP Connection(4)-192.168.56.1} CheckCiphers: [email protected]
[24-01-20 17:00:12.471] {RMI TCP Connection(4)-192.168.56.1} CheckKexes: [email protected],curve25519-sha256,[email protected],curve448-sha512
[24-01-20 17:00:12.509] {RMI TCP Connection(4)-192.168.56.1} [email protected] is not available.
[24-01-20 17:00:12.509] {RMI TCP Connection(4)-192.168.56.1} CheckSignatures: ssh-ed25519,ssh-ed448
[24-01-20 17:00:12.514] {RMI TCP Connection(4)-192.168.56.1} ssh-ed25519 is not available.
[24-01-20 17:00:12.514] {RMI TCP Connection(4)-192.168.56.1} ssh-ed448 is not available.
[24-01-20 17:00:12.518] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_KEXINIT sent
[24-01-20 17:00:12.519] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_KEXINIT received
[24-01-20 17:00:12.519] {RMI TCP Connection(4)-192.168.56.1} ext-info messaging supported by server
[24-01-20 17:00:12.519] {RMI TCP Connection(4)-192.168.56.1} server proposal: KEX algorithms: rsa2048-sha256,diffie-hellman-group18-sha512,diffie-hellman-group17-sha512,diffie-hellman-group16-sha512,diffie-hellman-group15-sha512,diffie-hellman-group14-sha256,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp384,curve25519-sha256,[email protected],ecdh-sha2-nistp521,ecdh-sha2-nistp256,ext-info-s
[24-01-20 17:00:12.520] {RMI TCP Connection(4)-192.168.56.1} server proposal: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256
[24-01-20 17:00:12.520] {RMI TCP Connection(4)-192.168.56.1} server proposal: ciphers c2s: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
[24-01-20 17:00:12.520] {RMI TCP Connection(4)-192.168.56.1} server proposal: ciphers s2c: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
[24-01-20 17:00:12.520] {RMI TCP Connection(4)-192.168.56.1} server proposal: MACs c2s: hmac-sha2-256,[email protected],hmac-sha2-512,[email protected]
[24-01-20 17:00:12.520] {RMI TCP Connection(4)-192.168.56.1} server proposal: MACs s2c: hmac-sha2-256,[email protected],hmac-sha2-512,[email protected]
[24-01-20 17:00:12.521] {RMI TCP Connection(4)-192.168.56.1} server proposal: compression c2s: none,zlib
[24-01-20 17:00:12.521] {RMI TCP Connection(4)-192.168.56.1} server proposal: compression s2c: none,zlib
[24-01-20 17:00:12.521] {RMI TCP Connection(4)-192.168.56.1} server proposal: languages c2s:
[24-01-20 17:00:12.522] {RMI TCP Connection(4)-192.168.56.1} server proposal: languages s2c:
[24-01-20 17:00:12.522] {RMI TCP Connection(4)-192.168.56.1} client proposal: KEX algorithms: curve25519-sha256,[email protected],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,ext-info-c,[email protected]
[24-01-20 17:00:12.523] {RMI TCP Connection(4)-192.168.56.1} client proposal: host key algorithms: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-512,rsa-sha2-256
[24-01-20 17:00:12.523] {RMI TCP Connection(4)-192.168.56.1} client proposal: ciphers c2s: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
[24-01-20 17:00:12.523] {RMI TCP Connection(4)-192.168.56.1} client proposal: ciphers s2c: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
[24-01-20 17:00:12.524] {RMI TCP Connection(4)-192.168.56.1} client proposal: MACs c2s: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
[24-01-20 17:00:12.524] {RMI TCP Connection(4)-192.168.56.1} client proposal: MACs s2c: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
[24-01-20 17:00:12.524] {RMI TCP Connection(4)-192.168.56.1} client proposal: compression c2s: none
[24-01-20 17:00:12.524] {RMI TCP Connection(4)-192.168.56.1} client proposal: compression s2c: none
[24-01-20 17:00:12.525] {RMI TCP Connection(4)-192.168.56.1} client proposal: languages c2s:
[24-01-20 17:00:12.525] {RMI TCP Connection(4)-192.168.56.1} client proposal: languages s2c:
[24-01-20 17:00:12.527] {RMI TCP Connection(4)-192.168.56.1} kex: algorithm: curve25519-sha256
[24-01-20 17:00:12.527] {RMI TCP Connection(4)-192.168.56.1} kex: host key algorithm: rsa-sha2-512
[24-01-20 17:00:12.527] {RMI TCP Connection(4)-192.168.56.1} kex: server->client cipher: aes128-ctr MAC: [email protected] compression: none
[24-01-20 17:00:12.527] {RMI TCP Connection(4)-192.168.56.1} kex: client->server cipher: aes128-ctr MAC: [email protected] compression: none
[24-01-20 17:00:12.530] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_KEX_ECDH_INIT sent
[24-01-20 17:00:12.530] {RMI TCP Connection(4)-192.168.56.1} expecting SSH_MSG_KEX_ECDH_REPLY
[24-01-20 17:00:12.556] {RMI TCP Connection(4)-192.168.56.1} ssh_rsa_verify: rsa-sha2-512 signature true
[24-01-20 17:00:12.556] {RMI TCP Connection(4)-192.168.56.1} Permanently added '[xx.yy.it]:8022' (RSA) to the list of known hosts.
[24-01-20 17:00:12.557] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_NEWKEYS sent
[24-01-20 17:00:12.557] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_NEWKEYS received
[24-01-20 17:00:12.570] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_EXT_INFO sent
[24-01-20 17:00:12.571] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_SERVICE_REQUEST sent
[24-01-20 17:00:12.572] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_EXT_INFO received
[24-01-20 17:00:12.572] {RMI TCP Connection(4)-192.168.56.1} server-sig-algs=<ssh-rsa,x509v3-rsa2048-sha256,rsa-sha2-256,rsa-sha2-512>
[24-01-20 17:00:12.581] {RMI TCP Connection(4)-192.168.56.1} SSH_MSG_SERVICE_ACCEPT received
[24-01-20 17:00:12.591] {RMI TCP Connection(4)-192.168.56.1} Authentications that can continue: publickey,keyboard-interactive,password
[24-01-20 17:00:12.591] {RMI TCP Connection(4)-192.168.56.1} Next authentication method: publickey
[24-01-20 17:00:12.592] {RMI TCP Connection(4)-192.168.56.1} Authentications that can continue: keyboard-interactive,password
[24-01-20 17:00:12.592] {RMI TCP Connection(4)-192.168.56.1} Next authentication method: keyboard-interactive
[24-01-20 17:00:12.659] {RMI TCP Connection(4)-192.168.56.1} Authentication succeeded (keyboard-interactive).
Jan 20, 2024 5:00:49 PM com.caucho.util.AlarmClock dispatch
WARNING: AlarmClock slow alarm Alarm[alarm[com.caucho.server.distcache.DataStore$DeleteAlarm@4f7c0be3]] 52749ms coordinator-delta 63382ms
[24-01-20 17:00:49.353] {CoordinatorThread[]-3} AlarmClock slow alarm Alarm[alarm[com.caucho.server.distcache.DataStore$DeleteAlarm@4f7c0be3]] 52749ms coordinator-delta 63382ms
Jan 20, 2024 5:00:49 PM com.caucho.util.AlarmClock dispatch
WARNING: AlarmClock slow alarm Alarm[alarm[SessionManager[/xxx]]] 45831ms coordinator-delta 63383ms
[24-01-20 17:00:49.354] {CoordinatorThread[]-3} AlarmClock slow alarm Alarm[alarm[SessionManager[/xx]]] 45831ms coordinator-delta 63383ms
Jan 20, 2024 5:00:49 PM com.caucho.util.AlarmClock dispatch
WARNING: AlarmClock slow alarm Alarm[alarm[ServletService[id=default,cluster=]]] 43473ms coordinator-delta 63384ms
[24-01-20 17:00:49.354] {CoordinatorThread[]-3} AlarmClock slow alarm Alarm[alarm[ServletService[id=default,cluster=]]] 43473ms coordinator-delta 63384ms
Jan 20, 2024 5:00:49 PM com.caucho.util.AlarmClock dispatch
WARNING: AlarmClock slow alarm Alarm[alarm[DeployControllerAlarm[null]]] 43473ms coordinator-delta 63384ms
[24-01-20 17:00:49.355] {CoordinatorThread[]-3} AlarmClock slow alarm Alarm[alarm[DeployControllerAlarm[null]]] 43473ms coordinator-delta 63384ms
Jan 20, 2024 5:00:49 PM com.caucho.util.AlarmClock dispatch
WARNING: AlarmClock slow alarm Alarm[alarm[com.caucho.network.listen.TcpPort$SuspendReaper@4d228131]] 43458ms coordinator-delta 63385ms
[24-01-20 17:00:49.356] {CoordinatorThread[]-3} AlarmClock slow alarm Alarm[alarm[com.caucho.network.listen.TcpPort$SuspendReaper@4d228131]] 43458ms coordinator-delta 63385ms
Jan 20, 2024 5:00:49 PM com.caucho.util.AlarmClock dispatch
WARNING: AlarmClock slow alarm Alarm[alarm[DeployControllerAlarm[null]]] 43440ms coordinator-delta 63386ms
[24-01-20 17:00:49.356] {CoordinatorThread[]-3} AlarmClock slow alarm Alarm[alarm[DeployControllerAlarm[null]]] 43440ms coordinator-delta 63386ms
com.jcraft.jsch.JSchException: channel is not opened.
at com.jcraft.jsch.Channel.sendChannelOpen(Channel.java:832)
at com.jcraft.jsch.Channel.connect(Channel.java:161)
thanks
from jsch.
luca-ma
commented on July 18, 2024
let me know if you need any other log or any other information for analyzing my problem
from jsch.
mwiede
commented on July 18, 2024
are you sure, that the issue comes from switching the library? When looking at google results, it seems, it's a popular issue which is caused by timeout and server workload.
does it occur always or just sometimes?
have you looked at the server logs?
from jsch.
luca-ma
commented on July 18, 2024
yes you're right
I get the same error even with the original library, there must be a reachability problem...
Thank you
from jsch.
Related Issues (20)
- Hang in Util.createSocket() if host is unreachable and a timeout is specified HOT 2
- Authentication fails while preauth succeeds for rsa-sha2-512 pubkey and ssh-rsa host key HOT 8
- jsch dependencySubstitution no longer works in Gradle? HOT 7
- Is jsch affected by the Terrapin attack? HOT 9
- Does JSCH support check-file or md5-hash SFTP extension? HOT 2
- How to figure the server-side ciphers? HOT 4
- Full List of Config Options For Backwards Compatibility with Original Jsch
- Merge release branch? HOT 1
- Question about ssh-rsa deprecation HOT 5
- Ordering of "ls"-method possible? HOT 2
- [Question] Disconnecting: Received data for nonexistent channel 0.
- Some bizarre exception when using SSH key to log on HOT 3
- failed to parse public key error with successful connection HOT 3
- After upgrade from version 02.11 to 0.2.16 connections fail with: java.io.IOException: End of IO Stream Read HOT 8
- sftp server failed to read file HOT 4
- Support for rsa2048-sha256 Key exchange HOT 6
- Jenkins com.jcraft.jsch.JSchAlgoNegoFailException: Algorithm negotiation fail HOT 5
- Connecting to Euler server, executing write and execute scripts in one connection, memory error HOT 1
- Does JSCH support JDK17 HOT 4
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from jsch.