Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

No connectivity against recent OpenSSH 8.2

See original GitHub issue

I’m trying to use vx.connectbot from F-Droid to upload files to my laptop over WLAN and see this in syslog on the laptop, running Debian unstable:

sshd[11179]: Unable to negotiate with 192.168.178.24 port 42928: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 [preauth]

OpenSSH 8.2 only offers these KexAlgorithms by default:

curve25519-sha256, curve25519-sha256@libssh.org, 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

Please implement diffie-hellman-group-exchange-sha256, should be closest to what already exists.

Issue Analytics

State:
Created 4 years ago
Reactions:2
Comments:11

Top GitHub Comments

1reaction

hyccommented, Dec 15, 2022

I’ve uploaded an APK that you can use as well. https://github.com/hyc/vxconnectbot/releases/tag/v1.7.1-50

0reactions

hyccommented, Dec 14, 2022

Note that you’ll need to uninstall your existing version before you can install the debug build. You should probably back up your settings first.

Maybe we can get @mmatuska motivated to synch up and release a new official binary.

Top Results From Across the Web

Release Notes - OpenSSH

They are no longer linked against libz and libcrypto. This may be of benefit to space constrained systems using any of those components...

latest openssh can not connect to older server - Cygwin

New OpenSSH client will not connect to server that use SHA1. ... It still works with current openssh (8.2) but I wouldn't know...

net-misc/openssh-8.2_p1: sshd[4020250]: recv_rexec_state ...

Restarting sshd over a ssh * connection is generally safe. >>> Auto-cleaning packages... >>> No outdated packages were found on your system.

After Upgrade the ASA5505 with 8.2.3,Not able to get the SSH ...

ASA 8.2.3 has a bug with SSH connections not working. ... Can I delete those configuration after upgrade with new version?

OpenSSH 8.2 released - LWN.net

OpenSSH 8.2 is out. This release removes support for the ssh-rsa key algorithm, which may disrupt connectivity to older servers; see the announcement...