Difference between revisions of "ssh failing with debug message "no mutual signature algorithm""
(Created page with "==problem== ssh from a newer client to an older server with rsa keys is failing and asking for a password via the "keyboard-interactive" method. ==versions== server openssh ve...") |
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when running the ssh command with "-vvv", the following debug message snippet appears... | when running the ssh command with "-vvv", the following debug message snippet appears... | ||
| − | debug3: authmethod_is_enabled publickey | + | debug3: authmethod_is_enabled publickey<br> |
debug1: Next authentication method: publickey | debug1: Next authentication method: publickey | ||
| − | debug1: Offering public key: /home/jsmith/.ssh/id_rsa.pub RSA SHA256:+untiuu11l/g3ziD0sdffrUHL+JsyasdfYdsXL/OJE explicit | + | debug1: Offering public key: /home/jsmith/.ssh/id_rsa.pub RSA SHA256:+untiuu11l/g3ziD0sdffrUHL+JsyasdfYdsXL/OJE explicit<br> |
| − | debug1: send_pubkey_test: '''no mutual signature algorithm''' | + | debug1: send_pubkey_test: '''no mutual signature algorithm'''<br> |
| − | debug2: we did not send a packet, disable method | + | debug2: we did not send a packet, disable method<br> |
| − | debug3: authmethod_lookup keyboard-interactive | + | debug3: authmethod_lookup keyboard-interactive<br> |
| − | debug3: remaining preferred: password | + | debug3: remaining preferred: password<br> |
| − | debug3: authmethod_is_enabled keyboard-interactive | + | debug3: authmethod_is_enabled keyboard-interactive<br> |
| − | debug1: Next authentication method: keyboard-interactive | + | debug1: Next authentication method: keyboard-interactive<br> |
==solution== | ==solution== | ||
Latest revision as of 17:22, 29 November 2023
Contents |
problem
ssh from a newer client to an older server with rsa keys is failing and asking for a password via the "keyboard-interactive" method.
versions
server openssh version: 6.7_p1 client openssh version: 9.2p1-2
error
when running the ssh command with "-vvv", the following debug message snippet appears...
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /home/jsmith/.ssh/id_rsa.pub RSA SHA256:+untiuu11l/g3ziD0sdffrUHL+JsyasdfYdsXL/OJE explicit
debug1: send_pubkey_test: no mutual signature algorithm
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
solution
add line...
PubkeyAcceptedKeyTypes +ssh-rsa
to file: ~/.ssh/config
