Website Down Checker

See whether a site was up at our last check and when it last went down.

Current Status

Status
Active
Server Type
nginx/1.20.1
Page Title
零信任_安全办公平台_远程安全访问_SASE方案_终端安全-白山云
Meta Description
基于零信任理念和白山云全球边缘网络,「网络+安全+服务+情报」一体化建设,更安全、更快速、更经济地保障企业全球化高效办公,确保分布在全球各地的用户都能随时随地、快速安全地访问企业本地和云上资源。
Meta Keywords
零信任,零信任架构,SASE,SD-WAN,ZTNA,企业网络安全,随时随地安全办公,远程办公,,可信终端,最小访问权限,内网安全访问,终端安全,白山云
Last Checked
just now
Last Status Change
No change observed
Last Downtime
Never observed down

Observed Changes

DateStatusServer
9/9/2026, 10:48:37 AMActivenginx/1.20.1

Don't just check uptime once — watch it 24/7

This is a one-time check. Turn on monitoring and we'll watch the domains that matter to you continuously, notifying you the moment anything moves across all three signals:

Uptime monitor with 7-day uptime percentage, failed checks, average latency by region, and daily outages

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor uptime free

Free for your first domain: uptime, DNS, and certificate together. No credit card.

About Website Uptime Monitoring

This page shows whether we could reach a website the last time we checked it. We also keep a record of when it went down and came back, so you can see whether an outage is new or has happened before. For each site we show:

  • Website availability and response status
  • Server software and configuration
  • Meta information including titles and descriptions
  • Historical uptime patterns

What this page reports

  • Last status change: When we last saw a site switch between reachable and unreachable
  • Last downtime: When a site was most recently seen down, and whether it has come back
  • Server and meta information: The server software, page title and meta tags we last observed

We check a domain at most once a day and record an observation only when something changes, so these are the times a change was seen rather than the exact moment it happened. For continuous, minute-by-minute checks with alerting, use website monitoring.


Disclaimer: Who.is is not affiliated with, endorsed by, or connected to any of the domains displayed on this page. We provide this information as a public service for informational purposes only.