远程监控 RDP 证书

Question

我们在 CentOS 6 服务器上使用 OpenSSL 来监控服务器上的证书以获取 RDP。

为此，我们使用：

openssl s_client -connect SERVER01:3389 -prexit

这一直完美无缺，直到 4 天前，它突然停止显示证书已被使用，而是显示单个服务器的以下内容：

CONNECTED(00000003)
140439032170136:error:140790E5:SSL routines:ssl23_write:ssl handshake failure:s23_lib.c:177:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 305 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : 0000
    Session-ID:
    Session-ID-ctx:
    Master-Key:
    Key-Arg   : None
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1539710511
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)
---
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 305 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : 0000
    Session-ID:
    Session-ID-ctx:
    Master-Key:
    Key-Arg   : None
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1539710511
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)
---

我已经看到旧版本的 OpenSSL 导致了这个错误，但由于版本没有改变 (1.0.1e) 并且它正在工作，我看不出有什么问题。

我也试过重置服务器的 RDP 证书，但还是没有改变。