[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Can't connect with some clients
[Thread Prev] | [Thread Next]
- Subject: Re: Can't connect with some clients
- From: Jakub Jelen <jjelen@xxxxxxxxxx>
- Reply-to: libssh@xxxxxxxxxx
- Date: Wed, 13 Jan 2021 11:58:03 +0100
- To: libssh@xxxxxxxxxx
On 1/12/21 4:09 PM, Emiliano Gonzalez wrote:
I have a ssh server. When I connect with the client on Fedora 32 ssh there are no problems.With PuTTY: Release 0.74 I can't connect with error: Couldn't agree a host key algorithm (available: rsa-sha2-512, rsa-sha2-256)
That sounds like an issue of PuTTY, that it can not use the RSA SHA2 hostkey algorithms from RFC8332.
As a workaround, you can configure your server with different hostkeys (ed25519) so incompatible clients can connect too.
From Centos 7 ssh server crash. In packet.c (line 1862):|/* For smaller blocks use limit of 1 GB as recommended in RFC4253 */ cipher->max_blocks = ((uint64_t)1 << 30) / cipher->blocksize; |cipher->blocksize is 0;
What cipher is used for this connection? There is no cipher that would have blocksize == 0.
Can you get a debug log? Regards, -- Jakub Jelen Senior Software Engineer Crypto Team, Security Engineering Red Hat, Inc.
|Re: Can't connect with some clients||Emiliano Gonzalez <egonzalez.hiperion@xxxxxxxxx>|
|Can't connect with some clients||Emiliano Gonzalez <egonzalez.hiperion@xxxxxxxxx>|