How to get detailed connection logging info in .NET
Sometimes when you connect to an external host and you get for example the error “The request was aborted: Could not create SSL/TLS secure channel”, you want to have more detailed info about what causes the error.
.NET has a build in diagnostics meganism that will give you more detailed info. The following have to be added to de web.config:
1: <configuration>
2:
3: <system.diagnostics>
4: <trace autoflush="true" />
5: <sources>
6: <source name="System.Net" maxdatasize="1024">
7: <listeners>
8: <add name="MyTraceFile"/>
9: </listeners>
10: </source>
11: <source name="System.Net.Sockets" maxdatasize="1024">
12: <listeners>
13: <add name="MyTraceFile"/>
14: </listeners>
15: </source>
16: <source name="System.Net.HttpListener">
17: <listeners>
18: <add name="MyTraceFile"/>
19: </listeners>
20: </source>
21: <source name="System.Net.Cache">
22: <listeners>
23: <add name="MyTraceFile"/>
24: </listeners>
25: </source>
26: </sources>
27:
28: <sharedListeners>
29: <add
30: name="MyTraceFile"
31: type="System.Diagnostics.TextWriterTraceListener"
32: initializeData="System.Net.trace.log"
33: />
34: </sharedListeners>
35: <switches>
36: <add name="System.Net" value="Verbose" />
37: <add name="System.Net.Sockets" value="Verbose" />
38: </switches>
39: </system.diagnostics>
40:
41: </configuration>
The detailed log info will be written to a file “System.Net.trace.log” in the root of your web application. In the log you will find info like for example this:
System.Net Information: 0 : [1796] SecureChannel#53793566 - Certificate is of type X509Certificate2 and contains the private key.
System.Net Information: 0 : [1796] AcquireCredentialsHandle(package = Microsoft Unified Security Protocol Provider, intent = Outbound, scc = System.Net.SecureCredential)
System.Net Error: 0 : [1796] AcquireCredentialsHandle() failed with error 0X8009030D.
System.Net Information: 0 : [1796] AcquireCredentialsHandle(package = Microsoft Unified Security Protocol Provider, intent = Outbound, scc = System.Net.SecureCredential)
System.Net Error: 0 : [1796] AcquireCredentialsHandle() failed with error 0X8009030D.
System.Net.Sockets Verbose: 0 : [1796] Socket#17610470::Dispose()
System.Net Error: 0 : [1796] Exception in the HttpWebRequest#30822392:: - The request was aborted: Could not create SSL/TLS secure channel.
System.Net Error: 0 : [1796] Exception in the HttpWebRequest#30822392::EndGetResponse - The request was aborted: Could not create SSL/TLS secure channel.
System.Net.Sockets Verbose: 0 : [4632] Socket#24383397::Dispose()
More info about system.diagnostics you will find here.