1.0.216 reports NoCommonAlgo error

[dly553709938]

Server system: RedHat 6.5
Server ssh version: OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010

Client system: macOS 15.2
Tabby version: 1.0.216

After my Tabby was automatic upgraded to version 216, when I connected to the server through ssh as before, the console output error:

NoCommonAlgo { kind: Kex, ours: ["curve25519-sha256", "[email protected]", "diffie-hellman-group14-sha256", "diffie-hellman-group16-sha512", "ecdh-sha2-nistp256", "ecdh-sha2-nistp384", "ecdh-sha2-nistp521"], theirs: ["diffie-hellman-group-exchange-sha256", "diffie-hellman-group-exchange-sha1", "diffie-hellman-group14-sha1", "diffie-hellman-group1-sha1"] }

I didn't have this problem before. I checked the Release Notes and changed to a new ssh backend.

I need to manually check diffie-hellman-group14-sha1 or diffie-hellman-group1-sha1 in CIPHERS of each existing Profile in Profiles & connection to connect to the server. Can it be changed to be selected by default? I think there are still many mature projects using RedHat 6.x system.

[Eugeny]

The first two dynamic gex exchanges are indeed not supported by the new backend yet. The g14sha1 is supported but needs to be explicitly enabled since it's less secure.

The kex list on the server looks weird though - it appears that it could in theory support standard sha256 fixed group exchanges but they're explicitly disabled and only the sha256 dynamic group kex is enabled.