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Flexmoster data server (https problems)

massimo besozzi asked on October 20, 2020

Hi ,
I have installed Flexmonster data server in a windows machine.
If i test connection with browser on localhost all it’s OK.If I connect from remote host (by name or IP address) i receive this error :”ERR_HTTP2_INADEQUATE_TRANSPORT_SECURITY”.I’m using https connection with a self signed cert.
What I’m wrong???

"DataSources": [
"Type": "database",
"DatabaseType": "mssql",
"ConnectionString": "Server=$databaseip\\$instanceName;Uid=XXXXX;Pwd=XXXXX;Database=$dbname",
"Indexes": {
"dp_4": {
"Query": "select * from [dbo].[table] "
"Security": {
"Authorization": {
"Enabled": true
"CORS": {
"AllowOrigin": "https://$apllicationCallerHost"
"HSTS": {
"MaxAge": 31536000,
"IncludeSubDomains": true
"Headers": {
"Content-Security-Policy": "default-src 'self'",
"X-Content-Type-Options": "nosniff",
"X-Frame-Options": "SAMEORIGIN",
"X-XSS-Protection": "1; mode=block"
"DataStorageOptions": {
"DataRefreshTime": 60,
"CacheSizeLimit": 15000
"Port": "443"
"HTTPS": {
"Enabled": true,
"Certificate": {
"Subject": "$certsubject",
"Store": "My",
"Location": "LocalMachine",
"AllowInvalid": true

2 answers

Mykhailo Halaida Mykhailo Halaida Flexmonster October 20, 2020

Hi Massimo,
Thank you for posting your question.
We’ve experienced similar behavior before – seems like it might either be caused by particular certificate configurations or be related to specific .NET versions.
Nevertheless, it can easily be omitted by specifying the safer Http1 as the value of the Protocols configuration for the Data Server:

"HTTPS": {
"Enabled": true,
"Protocols": "Http1",
"Certificate": {
"Path": "C:/***.pfx"

Please let us know if this helps.

massimo besozzi October 20, 2020

Great it works!!!!!!!
Thanks a lot.I’m waiting the response for linux version (another thread)

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