itsecuritytraining.au

SSL 证书

结果由实时握手读取

证书状态	剩余 79 天
颁发给	longblack.com.au
颁发者	YE2（Let's Encrypt）
生效时间	2026-09-30 01:54
到期时间	2026-12-29 01:54
是否覆盖当前域名	是
证书链	0 级（可能缺少中间证书）
签名算法	ecdsa-with-SHA384
序列号	0697267A198CEC51AFB313E0231009C830F6
自签名	否

证书覆盖的域名

共 89 个

*.admin.fiep.com.br *.admin.sportingoods.it *.app.sportingoods.it *.ava.fiep.com.br *.backend.sportingoods.it *.classbento.insta.au *.click.fiep.com.br *.comune.intosydneydirectory.com.au *.dashboard.fiep.com.br *.demo.sportingoods.it *.dev.sportingoods.it *.ead.fiep.com.br *.easy.intosydneydirectory.com.au *.estudante.fiep.com.br *.falecomigo.fiep.com.br *.fb.insta.au *.fiep.com.br *.guiaindustrial.fiep.com.br *.hobartchildcare.com.au *.hospitalityschool.com.au *.iana.com.au *.iel.fiep.com.br *.insta.au *.insurancehq.com.au *.intelligence.sportingoods.it *.interactivekiosks.com.au *.intosydneydirectory.com.au *.itsecuritytraining.au *.lacasaita.iana.com.au *.lekkerwijntje.be *.licitacao.fiep.com.br *.longblack.com.au *.mail.intosydneydirectory.com.au *.mail4.fiep.com.br *.mail5.fiep.com.br *.mails.fiep.com.br *.mailx.fiep.com.br *.metrics.intosydneydirectory.com.au *.ms.fiep.com.br *.ms1.fiep.com.br *.mta.fiep.com.br *.mx.intosydneydirectory.com.au *.mx0.fiep.com.br *.newmail.fiep.com.br *.random.fiep.com.br *.random.insta.au *.sistema.fiep.com.br *.snap.insta.au *.sportingoods.it *.stats.sportingoods.it *.tiktok.insta.au *.visual.sportingoods.it *.webmail.intosydneydirectory.com.au *.wendyykateex.insta.au *.wildcard.hobartchildcare.com.au *.wildcard.hospitalityschool.com.au *.wildcard.iana.com.au *.wildcard.insta.au *.wildcard.interactivekiosks.com.au *.wp.insta.au *.ww11.lekkerwijntje.be *.ww11.longblack.com.au *.ww16.hobartchildcare.com.au *.ww16.hospitalityschool.com.au *.ww16.iana.com.au *.ww16.insta.au *.ww16.insurancehq.com.au *.ww16.interactivekiosks.com.au *.ww16.intosydneydirectory.com.au *.ww16.itsecuritytraining.au *.ww25.iana.com.au *.ww25.insta.au *.ww25.intosydneydirectory.com.au *.ww38.fiep.com.br *.ww38.insta.au *.ww38.intosydneydirectory.com.au *.ww38.longblack.com.au fiep.com.br hobartchildcare.com.au hospitalityschool.com.au iana.com.au insta.au insurancehq.com.au interactivekiosks.com.au intosydneydirectory.com.au itsecuritytraining.au lekkerwijntje.be longblack.com.au sportingoods.it

带 * 的是通配符证书，只覆盖同一级子域名（如 *.example.com 不含 a.b.example.com）

常见问题

SSL 证书有什么用？

SSL / TLS 证书为浏览器与服务器之间的通信加密，同时证明「这个站点确实属于它声称的域名」。地址栏的锁形图标、以及 HTTPS 协议，都来自证书。

没有证书或证书无效时，浏览器会拦截并显示安全警告，用户无法正常访问，搜索引擎也会降低信任。

证书到期会怎样？

证书一旦过期，访客打开网站会看到「您的连接不是私密连接」这类整页警告，需要手动点「继续访问」才能进入，绝大多数用户会直接离开。

因此证书一般提前 30 天左右续期。本站结果页按剩余天数标色：绿色为 30 天以上，黄色为 7～30 天，红色为 7 天以内或已过期。

什么是证书链？为什么提示缺少中间证书？

证书由「根证书 → 中间证书 → 服务器证书」三级签发的链条构成。浏览器内置了根证书，但中间证书需要服务器一并下发。

如果服务器只下发了自己的证书、漏掉中间证书，部分浏览器（尤其是较旧的 Android 与部分移动端）会报「证书不受信任」。结果页的「证书链」若只有 1 级，通常就是这种情况。

一张证书能保护多个域名吗？

可以。证书通过 SAN（Subject Alternative Name）扩展同时列出多个域名，称为多域名证书；也可以使用通配符证书保护同一级的所有子域名。

通配符 *.example.com 只覆盖 a.example.com 这一级，不覆盖 a.b.example.com，也不覆盖根域名 example.com 本身，配置时需注意。

为什么查不到证书？

常见原因：该站点没有开启 HTTPS；只在 443 之外的端口提供 HTTPS；防火墙屏蔽了海外或本机访问；服务器未按 SNI 返回对应证书。

本站的检测是从服务器直接发起 TLS 握手读取证书，若目标只允许特定地区访问，结果可能与你在浏览器中看到的不一致。