Hi !

After installing ssldump, I could compare windows xp and windows 7 clients
STARTTLS negotiation.

While the windows 7 used TLS_RSA_WITH_AES_128_CBC_SHA via TLSv1/SSLv3

 

Windows XP output is

New TCP connection #1: 10.0.0.252(5000) <-> my.server (25)

1 1  0.0182 (0.0182)  C>S SSLv2 compatible client hello

  Version 3.1 

  cipher suites

  TLS_RSA_WITH_RC4_128_MD5  

  TLS_RSA_WITH_RC4_128_SHA  

  TLS_RSA_WITH_3DES_EDE_CBC_SHA  

  SSL2_CK_RC4  

  SSL2_CK_3DES  

  SSL2_CK_RC2  

  TLS_RSA_WITH_DES_CBC_SHA  

  SSL2_CK_DES  

  TLS_RSA_EXPORT1024_WITH_RC4_56_SHA  

  TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA  

  TLS_RSA_EXPORT_WITH_RC4_40_MD5  

  TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5  

  SSL2_CK_RC4_EXPORT40  

  SSL2_CK_RC2_EXPORT40  

  TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA  

  TLS_DHE_DSS_WITH_DES_CBC_SHA  

  TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA  

1 2  0.0188 (0.0005)  S>C  Handshake

      ServerHello

        Version 3.1 

        session_id[32]=

          3e d1 e3 37 a1 47 c0 87 ff 1c 8b bf ab f3 fa 94 

          f7 da e7 27 d1 54 cf 10 95 ad ec c9 b4 90 b1 6d 

        cipherSuite         TLS_RSA_WITH_RC4_128_MD5

        compressionMethod                   NULL

1 3  0.0188 (0.0000)  S>C  Handshake

      Certificate

1 4  0.0202 (0.0014)  S>C  Handshake1 5  0.0202 (0.0000)  S>C  Handshake1
0.0229 (0.0026)  C>S  TCP FIN

1    0.0230 (0.0001)  S>C  TCP FIN

New TCP connection #2: 10.0.0.252(1025) <-> my.server(25)

2    60.0266 (60.0266)  C>S  TCP FIN

2    60.0267 (0.0000)  S>C  TCP FIN

 

So how can I enable SSLv2 support ? Is it on openssl or sendmail ?

Any help appreciated.

Thanks and regards

David

 

 

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