Hi,

> the example only run if we use the Netty-all 4.1.36

I am not sure now why the current ssl support only works on 4.1.36 or higher. 
Is it a SSL limit provided by the Netty project, for example some features 
start from 4.1.36? If that is the case, I think we can simply upgrade the netty 
dependency of Dubbo to 4.1.36.

> So this means I should exclude the provided Netty version and user the 4.1.36 
> for proper SSL connection, doesn't this?

I think you can do that for now, the provided version is only one recommend 
version provided by Dubbo for convenience. I believe it can work well with most 
Netty 4.x versions

Jun

> On Apr 21, 2020, at 9:36 PM, Tien Dat PHAN <[email protected]> wrote:
> 
> Dear Jun Liu,
> 
> Thanks for your link.
> I have checked the examples. It was working properly.
> My concern is that, the example only run if we use the Netty-all 4.1.36, 
> while the provided Netty-all version from Dubbo 2.7.5 is 4.1.25.
> If I use the 4.1.25 (provided by Dubbo dependency by default), the SSL 
> connection will fail.
> 
> So this means I should exclude the provided Netty version and user the 4.1.36 
> for proper SSL connection, doesn't this?
> 
> Best regards
> Tien Dat PHAN
> 
> On 2020/04/17 11:30:18, Jun Liu <[email protected]> wrote: 
>> Here’s one example of how to enable SSL on Dubbo 
>> https://github.com/apache/dubbo-samples/tree/master/java/dubbo-samples-ssl
>> 
>> Hope it can help.
>> 
>> Jun
>> 
>>> On Apr 15, 2020, at 5:45 PM, Tien Dat PHAN <[email protected]> wrote:
>>> 
>>> Dear experts
>>> 
>>> We are struggling to enable the SSL handshake between Dubbo providers and 
>>> consumers.
>>> Does Dubbo community have any example to start with? Or did anyone succeed 
>>> in configuring it?
>>> 
>>> We understand that this is a very generic question, since the issue can 
>>> originate from Netty4, from the OS or from the JDK version. 
>>> We are using Dubbo 2.7.6, on CentOS 7.4 with JDK Java HotSpot(TM) 64-Bit 
>>> Server VM (build 25.201-b09, mixed mode).
>>> 
>>> Any experience from you experts would be helpful for us now.
>>> 
>>> Thanks for your consideration
>>> Best regards
>>> Tien Dat PHAN
>> 
>> 

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