Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DRedirect ChainAction3 redirect(s), 350 ms totalFIX
https://web.skype.com
41 ms · HTTP/1.1
https://teams.live.com/v2
29 ms · HTTP/1.1
https://teams.live.com/v2/
154 ms · HTTP/1.1
https://teams.live.com/v2/unsupported-br...
126 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://web.skype.com | 301 | 41 ms | HTTP/1.1 | |
| 2 | https://teams.live.com/v2 | 301 | 29 ms | HTTP/1.1 | |
| 3 | https://teams.live.com/v2/ | 302 | 154 ms | HTTP/1.1 | |
| 4 | https://teams.live.com/v2/unsupported-br... | 200 | 126 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
Each redirect adds latency. Try to minimize the chain to 1 hop.
Redirect chain — each hop adds latency; combine into one redirect where possible.
Source: Google Search Central / web.dev
If permanent, use 301 instead.
302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.
Learn more ▾ ▴
Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).
Source: Google Search Central
DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
BDNS Records1 A records, 31 ms lookupREVIEW
| A | 52.113.194.133 |
| AAAA | 2620:1ec:42::133 |
| CNAME | s-0006.s-msedge.net |
| NS | — |
| MX | — |
| TXT | — |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.
Learn more ▾ ▴
Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.
Source: SRE practice / DNS architecture
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.
Learn more ▾ ▴
RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.
Source: RFC 1034
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.
Learn more ▾ ▴
SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.
Source: RFC 7208 (SPF)
CCrawlabilityActionrobots.txt present, sitemap with 0 URLsREVIEW
Search engines may not be able to parse the sitemap. Fix XML validation errors.
An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.
Learn more ▾ ▴
Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.
Source: sitemaps.org / Google Search Central
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
Learn more ▾ ▴
Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
<!doctype html><html lang="en" class="theme-defaultV2"><head><meta name="robots" content="noindex"/><title>Unsupported Browser | Microsoft Teams</title><link rel="shortcut icon" type="image/x-icon" id="teams-favicon" href="https://statics.teams.cdn.live.net/evergreen-assets/icons/microsoft_teams_logo_refresh_v2025.ico"/><style nonce="fd6IqhDwtFK9xPgdAAihOQ==">html,
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Web', sans-serif;
width: 100%;
height: 100%;
padding: 0;
margin: 0;
}
html {
font-size: 10px;
}
body {
font-size: 1.4rem;
font-weight: 400;
line-height: 1.4286;
box-sizing: border-box;
background-color: var(--themeBackgroundColor);
color: var(--themeColor);
}
/** Enable antialiasing and font smoothing across supporting browsers for all elements */
* {
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
margin-block-start: 0;
margin-block-end: 0;
}
#teams-logo {
position: absolute;
width: 32px;
height: 32px;
margin: 3.2rem 0 0 6rem;
}
#unsupported-browser {
height: inherit;
width: inherit;
position: absolute;
top: 0;
display: flex;
justify-content: center;
align-items: center;
}
#unsup-container {
width: 600px;
display: flex;
flex-direction: column;
align-items: center;
gap: 24px;
padding-bottom: 32px;
padding-top: 32px;
}
#unsup-title {
text-align: center;
font-style: normal;
font-weight: 700;
font-size: 18px;
line-height: 24px;
margin-top: -8px;
}
#unsup-description {
text-align: center;
}
p a {
color: #5B5FC7;
text-decoration: none;
}
p a:visited {
color: #5B5FC7;
text-decoration: none;
}
.ts-btn-fluent {
font-weight: 600;
position: relative;
border-radius: .4rem;
padding: 0 2rem;
min-width: 9.6rem;
height: 3.2rem;
display: inline-flex;
align-items: center;
text-decoration: none;
}
.ts-btn-fluent::before {
content: "";
position: absolute;
top: .1rem;
left: .1rem;
right: .1rem;
bottom: .1rem;
border: .1rem solid transparent;
border-radius: .4rem
}
.ts-btn-fluent::after {
content: "";
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
border: .1rem solid transparent;
border-radius: .4rem
}
.ts-btn-fluent.ts-btn-fluent-primary {
box-shadow: 0 .2rem .4rem -.075rem rgba(0,0,0,.25);
background: #5b5fc7;
border: 0;
color: #fff
}
.ts-btn-fluent.ts-btn-fluent-primary:hover {
background: #4f52b2
}
.ts-btn-fluent.ts-btn-fluent-primary:active,
body.acc-keyboard-mode .ts-btn-fluent.ts-btn-fluent-primary:focus {
background: #444791;
box-shadow: none
}
body.acc-keyboard-mode .ts-btn-fluent.ts-btn-fluent-primary:focus::after {
border-color: #252423
}
body.acc-keyboard-mode .ts-btn-fluent.ts-btn-fluent-primary:focus::before {
border-color: #fff
}
#browser-list {
padding: 0;
display: flex;
flex-direction: column;
align-items: flex-start;
gap: 12px;
margin-bottom: 32px;
}
.unsup-li {
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
gap: 8px;
}
.unsup-li a {
cursor: pointer;
}
.unsup-li svg {
padding: 3px;
}</style></head><body><div id="supportedBrowserConfigs" style="display: none;" data-configs='{"ag08":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"ag09":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"bleu":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"delos":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"dod":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"gallatin":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"gcch":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"life":{"edgeChromium":{"isSupported":true,"minVersion":"97.0"},"chrome":{"isSupported":true,"minVersion":"97.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}},"work":{"edgeChromium":{"isSupported":true,"minVersion":"80.0"},"chrome":{"isSupported":true,"minVersion":"80.0"},"firefox":{"isSupported":true,"minVersion":"101.0"},"safari":{"isSupported":true,"minVersion":"16.0"}}}'></div><svg 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BTLS Certificate Expiry & Recommendations177 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable DNSSEC on your domain for DNS spoofing protection
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+IPv6 ReadinessIPv6 reachable (1 ms)PASS
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
HTTP → HTTPS
Consistent
A+Domain Intelligenceskype.com — via MarkMonitor Inc., 23 years, 4 months oldPASS
312 days
April 23, 2027
177 days
Issued by Microsoft Corporation
23 years, 4 months
Registered April 23, 2003
Not enabled
Protects against DNS spoofing
Unknown
2603:1020:201:10::10f
MarkMonitor Inc.
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.
Learn more ▾ ▴
DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.
Source: ICANN / RFC 4033
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.
Learn more ▾ ▴
Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.
Source: ICANN / domain-security best practice