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.
