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https://srf.ch

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
92
GRADE
A
FIX
1
REVIEW
2
PASS
5
INFO
1
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
5 PASS 2 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.srf.ch/
200https://srf.ch/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://srf.ch/ → https://www.srf.ch

Consistent

B
TLS Certificate Expiry & Recommendations
86 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

86
days left
0d 30d 60d 90d+

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+
DNS Records
1 A records, 89 ms lookup
PASS
1 A records, 89 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 89.106.200.1
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2a12:5240::1
Info::
8 nameserver(s) configured
Got: ns-1660.awsdns-15.co.uk, dns3.p07.nsone.net, dns2.p07.nsone.net, ns-181.awsdns-22.com, dns1.p07.nsone.net, ns-544.awsdns-04.net, ns-1490.awsdns-58.org, dns4.p07.nsone.net
Info::
1 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 89 ms
Got: 89 ms
A89.106.200.1
AAAA2a12:5240::1
CNAME—
NSns-1660.awsdns-15.co.uk, dns3.p07.nsone.net, dns2.p07.nsone.net, ns-181.awsdns-22.com, dns1.p07.nsone.net, ns-544.awsdns-04.net, ns-1490.awsdns-58.org, dns4.p07.nsone.net
MX
10 srf-ch.mail.protection.outlook.com
TXT
autodesk-domain-verification=Hzebz56nJLNW5rW-30Ak
adobe-idp-site-verification=dd157840-b952-496a-9c7a-9190eceeffd7
flexera-domain-verification-bzxffzpsrkiergsy
google-site-verification=0RflA-8h7ZmVGnx4K22KHOeIneEOMyqMy1YU4Y35VMo
bw=LO2KI3eoSw7eFg/FvZuQpRuRbRRRqIfs1HRtuqT6tLez
teamviewer-sso-verification=4ad5ab0198e84853a2bf8d89f7b652ca
atlassian-domain-verification=yCKDUfTrPpExp6ak8gbXmFvB17/rcSzjh8sLMixLHP6rHkO0m9...
google-site-verification=SXjIxMG_fpm1C4Hq2f8bbE3i-tr0jC3a-BkuqxkKabw
docusign=c2cdf5bd-6cf6-4085-a045-acd13521c176
mentimeter-b950c83f-e240-400e-ae07-d39368cfc6cf
SPF v=spf1 mx include:spf.srf.ch include:spf.protection.outlook.com include:spfa.cpm...
BTTjlM9xmieZeglAQby_YUYwhUXNCg
jetbrains-domain-verification=45ybbar725vrovoh8t4vbezcu
facebook-domain-verification=7d7806gg97ctzj34fgf8r02mgftjhg
miro-verification=a46d6131424993b8509cb1c496f605264616b632
canva-site-verification=qN4N1ISjc35e6kcobW930g
google-site-verification=vNtk5EEgh6GJjOJUs8UA6wszXg0eZnbK1ovglT11iAs
docusign=8c83b739-807f-4329-b520-f5653426b030
knowbe4-site-verification=08f7c42ec6ac8b41e31c49cf78800938
docker-verification=4e8f3b83-ebbb-43b7-ab2f-7ccd01bd2993
CAALookup not available with standard resolver
Resolved in 89 ms

Multiple A records provide failover if one server goes down.

Why this matters

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

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A
Redirect Chain
1 redirect(s), 526 ms total
PASS
1 redirect(s), 526 ms total
Info::
Single redirect
Got: https://srf.ch → https://www.srf.ch (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 526 ms total
Got: 526 ms

https://srf.ch

448 ms · HTTP/1.1

301

https://www.srf.ch

77 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://srf.ch301448 msHTTP/1.1
2https://www.srf.ch20077 msHTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a12:5240::1
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a12:5240::1 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 1 URLs
PASS
robots.txt present, sitemap with 1 URLs
Info::
robots.txt is present
Got: 798 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 1 entries
Info::
Sitemap index with 1 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 798 B Sitemaps referenced 7 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /suche/
Disallow: /showcase/
Disallow: /testcase/
Disallow: /styleguide/
Disallow: /suche
Disallow: /srg-login/*
Disallow: /article/*
Disallow: /landingpage/*
Disallow: /play/video/*/socialTracking/counts
Disallow: /play/audio/*/socialTracking/counts
Disallow: /play/audio/*/socialTracking/share/*
Disallow: /play/audio/*/socialTracking/like
Disallow: /play/radio/audio/mail
Disallow: /play/tv/video/mail
Disallow: /play/ping.xml

Sitemap: https://www.srf.ch/play/sitemap/index
Sitemap: https://www.srf.ch/meteoapi/sitemap/index.xml
Sitemap: https://www.srf.ch/new-news-sitemap
Sitemap: https://www.srf.ch/sitemap/index/srf
Sitemap: https://www.srf.ch/sitemap/radioshows
Sitemap: https://www.srf.ch/sitemap/radioepisodes
Sitemap: https://sitemap.lrc.swisstxt.ch/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 1 entries Valid XML Yes
Child Sitemaps:
A
HTTP Probe Timing
Total 495 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
46 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
147 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
151 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
495 ms
Total Time Total request time from DNS lookup through full response.
495 ms

Connection waterfall

DNS Lookup 46 ms TCP Connect 147 ms TLS Handshake 151 ms Server Processing 152 ms Content Transfer 0 ms
Domain Intelligence
Domain intelligence data not available
INFO
Domain intelligence data not available

RDAP and WHOIS lookup both failed

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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