Problem:
I have a generated WCF client which consumes a third party WebService. This client is part of a WeAPI Controler hosted in IIS 7.5. The third party Service requires TLS 1.2 for connections.
When the WCF client tries to connect to the third party WebService I can see in Fiddler that the handshake fails and that the client request indicates that it is using TLS 1.0 instead of 1.2 (see Fiddler output below).
I already tried KB245030 and activated TLS 1.2 for SChannel both client and server but with no avail (Also using the NARTAC Tool)
http://support2.microsoft.com/kb/245030
If I use Fiddler and modify the Fiddler Script to always use TLS 1.2 the Service call works fine.
Question:
Is it possible to configure the system so that the WCF client call uses TLS 1.2 when hosted in IIS 7.5?
Fiddler capture:
A SSLv3-compatible ClientHello handshake was found. Fiddler extracted the parameters below.
Version: 3.1 (TLS/1.0)<br/>
Random: ...<br/>
SessionID: empty
Extensions:<br/>
renegotiation_info 00<br/>
server_name ...<br/>
elliptic_curves secp256r1 [0x17], secp384r1 [0x18]<br/>
ec_point_formats uncompressed [0x0]
Ciphers:<br/>
[002F] TLS_RSA_AES_128_SHA<br/>
[0035] TLS_RSA_AES_256_SHA<br/>
[0005] SSL_RSA_WITH_RC4_128_SHA<br/>
[000A] SSL_RSA_WITH_3DES_EDE_SHA<br/>
[C013] TLS1_CK_ECDHE_RSA_WITH_AES_128_CBC_SHA<br/>
[C014] TLS1_CK_ECDHE_RSA_WITH_AES_256_CBC_SHA<br/>
[C009] TLS1_CK_ECDHE_ECDSA_WITH_AES_128_CBC_SHA<br/>
[C00A] TLS1_CK_ECDHE_ECDSA_WITH_AES_256_CBC_SHA<br/>
[0032] TLS_DHE_DSS_WITH_AES_128_SHA<br/>
[0038] TLS_DHE_DSS_WITH_AES_256_SHA<br/>
[0013] SSL_DHE_DSS_WITH_3DES_EDE_SHA<br/>
[0004] SSL_RSA_WITH_RC4_128_MD5<br/>
Compression:<br/>
[00] NO_COMPRESSION<br/>
