curl V2EX 的 ssl 站点 会报证书不匹配

应该是系统问题，直接不检查证书即可

什么版本的 curl ？
用其他，比如 wget 能复现么？
HTTPS CDN 一般需要客户端支持 SNI

@ryd994
[root@c ~]# curl -V
curl 7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Protocols: tftp ftp telnet dict ldap http file https ftps
Features: GSS-Negotiate IDN IPv6 Largefile NTLM SSL libz



[root@c ~]# wget https://sunp.eu.org
--2015-10-03 03:13:13-- https://sunp.eu.org/
Resolving sunp.eu.org... 23.251.125.131, 23.251.126.133
Connecting to sunp.eu.org|23.251.125.131|:443... connected.
ERROR: certificate common name `*.c3edge.com' doesn't match requested host name `sunp.eu.org'.
To connect to sunp.eu.org insecurely, use `--no-check-certificate'.
Unable to establish SSL connection.

你的系统问题。
美帝 Debian 7
root@GF-f:~# wget https://sunp.eu.org
--2015-10-03 18:10:28-- https://sunp.eu.org/
Resolving sunp.eu.org (sunp.eu.org)... 23.251.125.131, 23.251.126.133
Connecting to sunp.eu.org (sunp.eu.org)|23.251.125.131|:443... connected.
HTTP request sent, awaiting response... 502 Bad Gateway
2015-10-03 18:10:31 ERROR 502: Bad Gateway.
---
阿里云 Debian 7
root@GF-Aliyun:~# wget https://sunp.eu.org
--2015-10-03 18:11:40-- https://sunp.eu.org/
Resolving sunp.eu.org (sunp.eu.org)... 117.34.96.85, 59.173.16.210, 183.60.90.83, ...
Connecting to sunp.eu.org (sunp.eu.org)|117.34.96.85|:443... connected.
HTTP request sent, awaiting response... 502 Bad Gateway
2015-10-03 18:11:40 ERROR 502: Bad Gateway.

可能是你的 curl 版本过老，还不支持 SNI

表示无此问题
Centos 6.7

root@kn007:~
> curl --version
curl 7.43.0 (x86_64-unknown-linux-gnu) libcurl/7.43.0 OpenSSL/1.0.1e zlib/1.2.8 libidn/1.18
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: IDN Largefile NTLM NTLM_WB SSL libz UnixSockets

用
openssl s_client -connect sunp.eu.org -showcerts
看看
如果证书链没问题，那就是你的 OS 不支持 SNI 导致