THE INFORMATION IN THIS ARTICLE APPLIES TO:
EFT v8.0 and later store Advanced Properties in a JSON file. When you upgrade from EFT v7.4.x to EFT v8, the non-default settings that you have defined in the registry will be added to the Advanced Properties file during upgrade. (Default settings become part of the EFT configuration files.) For a more on how to use advanced properties, and a spreadsheet of the advanced properties, please refer to the "Advanced Properties" topic in the help for your version of EFT.
DISCUSSION
The new SFTP library is not allowing connections to a remote server using "diffie-hellman-group-exchange-sha256" and “diffie-hellman-group-exchange-sha1“ KEXes.
WORKAROUND
In EFT v8 and later:
Add the name:value pair to the AdvancedProperties.JSON file in EFT's \ProgramData\ directory as described in the "Advanced Properties" topic in the online help for your version of EFT.
{
"SFTPEnableGroupsExchangeKex": false
}
In versions prior to v8.0:
Create the following registry setting:
HKEY_LOCAL_MACHINE\Software\WOW6432Node\GlobalSCAPE Inc.\EFT Server 7.4\
Type: DWORD
Value name: SFTPEnableGroupsExchangeKex
Default Value: 0 (disables both ciphers, "diffie-hellman-group-exchange-sha256" and “diffie-hellman-group-exchange-sha1“)
Cached: Yes
Restart?: Yes
Backup/Restore: Yes
See also https://kb.globalscape.com/KnowledgebaseArticle11439.aspx