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windfly_290350
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Sep 14, 2016

Connection reset to internal web server after certain time such as one day

Here is the setup: a standard virtual server is setup with load balance pool where there is only one server at this point. The internal web server could only work in https thus there are both custom client SSL profile and custom server SSL profile profile.

 

Access to the internal web site via F5 from client is working fine once setup, the only issue is that after running certain time such as one day, end user's client side would get request time out errors.

 

When it happens, the issue could be fixed by remove/re-add back the custom client/server SSL_Proile ( click "Update" button on the page). I guess the request time out might be caused a connection reset but it seems that it could not recover by itself.

 

The internal web server is a standard ASP.NET MVC application and we didn't see such issues at other deployment with F5. So we are thinking the issue might be related with F5. At this point, we don't understand why F5 would behavior like this. It might be due to some configuration, but we are not sure. From logs (System->Logs), we didn't see any error around the time when end user reported the issue "request time out" as well. Again we are not ruling out internal web server. The challenge is that we don't really have any debug information from F5 side to drill down to next level to debug at internal web server side.

 

It would be really appreciated if someone could shed some lights about how to debug this issue. Thanks very much in advance.