Dears,

We are using Pragma FortressSSH 5.0.9.2696 as a server role.

Recently we encounter a problem related to "Protocol error: no matching DH grp found" after the client upgrade the OPENSSH from v6.9 to v8.0. With reference to the information from the link below, seems diffie-hellman-group-exchange-sha256 changed to support the minimal modulus length from 1024 to 2048, which doesn't compatible with current Pragma version. We would like to know which Pragma version could compatible with OPENSSH 8.0?

https://tools.ietf.org/html/draft-ietf-curdle-ssh-dh-group-exchange-05

Stephen