ASP.Net Core 1.1 App running inside docker container cannot connect to Remote Sql Server on Windows

[rgottumu]

I have an ASP.Net Core Web API running on .Net Core 1.1 is not able to connect to a sql server which is in my network but outside of docker container. I always get connection time out error.

Connection Timeout Expired. The timeout period elapsed during the post-login phase. The connection could have timed out while waiting for server to complete the login process and respond;

App works fine when running outside of the docker container.

Dockerfile:

FROM microsoft/aspnetcore:1.1
WORKDIR /contest
EXPOSE 85
EXPOSE 1433
COPY /out .
ENTRYPOINT ["dotnet", "contest.dll"]

any help is appreciated. Thank you.

[karelz]

Did you try to do the same thing in just .NET Core, without ASP.NET Core? (basically minimal repro)
It would help us identify where the problem might be.

[rgottumu]

Tried with a .net core console application, same error.

[karelz]

Can you please paste the code?

[karelz]

Did you get chance to try .NET Core 2.0 Preview2?

[rgottumu]

sorry for the late reply.. I tested on various environments and finally figured out the root cause. My dev sql instance is still on Sql Server 2008 R2 (RTM). I can connect every instance that I have.

[Petermarcu]

Ok, sounds like this issue can be closed. Thanks!