Openssl:无法下载更改端口的证书

Openssl:无法下载更改端口的证书

我使用以下命令从服务器下载 FTPS 证书:

echo | openssl s_client -showcerts -connect 192.168.1.88:990

证书按预期下载。

现在,在服务器端,如果我将默认端口更改990为某个未使用的端口100,并再次对新端口使用与上面相同的命令,则会发生错误。

echo | openssl s_client -showcerts -connect 192.168.1.88:100

错误说:

CONNECTED(00000003)

3076294336:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:796:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 7 bytes and written 307 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: 1470134380
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)
---

当默认端口更改时,如何从服务器下载 FTPS 证书?

(虽然,我问的是 FTPS,但仅 HTTPS 也存在同样的问题。但现在我只关心 FTPS)

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