IMG: AFX SSH Connection to CYGWIN receives "Algorithm Negotiation Error"
Originally Published: 2016-02-03
Last Modified: 2023-10-06
Article Number
Applies To
RSA Product/Service Type: Appliance, Soft Appliance, Enterprise Software
RSA Version/Condition: 7.0
Platform: All
Issue
The log file shows
java.io.IOException: Algorithm negotiation fail
at net.sf.commons.ssh.jsch.JschConnectionFactory.connectUsingPassword(JschConnectionFactory.java:82)
at net.sf.commons.ssh.jsch.JschConnectionFactory.openConnection(JschConnectionFactory.java:142)
at com.aveksa.AFX.transport.ssh.SshSettingsTest.runTest(SshSettingsTest.java:66)
......
Caused by: com.jcraft.jsch.JSchException: Algorithm negotiation fail
at com.jcraft.jsch.Session.receive_kexinit(Session.java:529)
at com.jcraft.jsch.Session.connect(Session.java:291)
at net.sf.commons.ssh.jsch.JschConnectionFactory.connectUsingPassword(JschConnectionFactory.java:72)
Resolution
KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
Above needs to be on one single line.
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