自签名TLS1.2证书握手失败

我一直试图根据本教程在我的Debian安装上设置一个自签名的SSL证书https://www.digitalocean.com/community/tutorials/how-to-create-an-ecc-certificate-on-nginx -for-debian-8，但连接时出现以下错误：

openssl s_client -connect vpsipaddr:443 -state -debug CONNECTED(00000003) SSL_connect:before/connect initialization write to 0x7d3380 [0x7d3f10] (289 bytes => 289 (0x121)) 0000 - 16 03 01 01 1c 01 00 01-18 03 03 62 c4 ec 46 0b ...........b..F. 0010 - 47 d3 35 9a f1 b4 54 11-fe 85 66 b8 e7 70 a2 e6 G.5...T...f..p.. 0020 - 1e 4c 57 11 75 81 86 be-53 d6 0e 00 00 82 c0 30 .LW.u...S......0 0030 - c0 2c c0 28 c0 24 c0 14-c0 0a 00 a3 00 9f 00 6b .,.(.$.........k 0040 - 00 6a 00 39 00 38 00 88-00 87 c0 32 c0 2e c0 2a .j.9.8.....2...* 0050 - c0 26 c0 0f c0 05 00 9d-00 3d 00 35 00 84 c0 2f .&.......=.5.../ 0060 - c0 2b c0 27 c0 23 c0 13-c0 09 00 a2 00 9e 00 67 .+.'.#.........g 0070 - 00 40 00 33 00 32 00 9a-00 99 00 45 00 44 c0 31 [email protected] 0080 - c0 2d c0 29 c0 25 c0 0e-c0 04 00 9c 00 3c 00 2f .-.).%.......<./ 0090 - 00 96 00 41 c0 11 c0 07-c0 0c c0 02 00 05 00 04 ...A............ 00a0 - c0 12 c0 08 00 16 00 13-c0 0d c0 03 00 0a 00 ff ................ 00b0 - 01 00 00 6d 00 0b 00 04-03 00 01 02 00 0a 00 34 ...m...........4 00c0 - 00 32 00 0e 00 0d 00 19-00 0b 00 0c 00 18 00 09 .2.............. 00d0 - 00 0a 00 16 00 17 00 08-00 06 00 07 00 14 00 15 ................ 00e0 - 00 04 00 05 00 12 00 13-00 01 00 02 00 03 00 0f ................ 00f0 - 00 10 00 11 00 23 00 00-00 0d 00 20 00 1e 06 01 .....#..... .... 0100 - 06 02 06 03 05 01 05 02-05 03 04 01 04 02 04 03 ................ 0110 - 03 01 03 02 03 03 02 01-02 02 02 03 00 0f 00 01 ................ 0120 - 01 . SSL_connect:SSLv2/v3 write client hello A read from 0x7d3380 [0x7d9470] (7 bytes => 0 (0x0)) 139916497704592: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 289 bytes --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE 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: 1473161145 Timeout : 300 (sec) Verify return code: 0 (ok) --- 

我还没有find答案的其他地方，不太清楚如何debugging错误，虽然我已经尝试过了。 谢谢！

 SSL_connect:SSLv2/v3 write client hello A read from 0x7d3380 [0x7d9470] (7 bytes => 0 (0x0)) 139916497704592:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:s23_lib.c:177: