Infrastructure - https://geogebra.org BeaverCheck Audit

C

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

No IPv6 (AAAA) records found

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

No IPv6 Support

About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

REVIEW

www/non-www, trailing slash, HTTP→HTTPS

Both www and non-www versions serve content

Got: Both variants return 200 Expected: One variant 301-redirects to the other

HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.geogebra.org/

200https://geogebra.org/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://geogebra.org/ → https://geogebra.org/

Consistent

B

TLS Certificate Expiry & Recommendations

182 days until leaf cert expires — 3 issues to address

REVIEW

Certificate validity

182

days left

0d 30d 60d 90d+

Recommended actions

Submit your domain to hstspreload.org to be added to the Chrome preload list
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

4 A records, 5 ms lookup

PASS

4 A records, 5 ms lookup

Resolves to 4 IPv4 address(es)

Got: 99.86.20.80, 99.86.20.50, 99.86.20.87, 99.86.20.128

No IPv6 (AAAA) records

4 nameserver(s) configured

Got: ns-1082.awsdns-07.org, ns-1933.awsdns-49.co.uk, ns-380.awsdns-47.com, ns-548.awsdns-04.net

5 mail exchanger(s) configured

CAA records not checked

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

SPF record present in TXT

DNS resolution time: 5 ms

Got: 5 ms

A	99.86.20.80, 99.86.20.50, 99.86.20.87, 99.86.20.128
AAAA	—
CNAME	—
NS	ns-1082.awsdns-07.org, ns-1933.awsdns-49.co.uk, ns-380.awsdns-47.com, ns-548.awsdns-04.net
MX	10 aspmx.l.google.com 20 alt2.aspmx.l.google.com 20 alt1.aspmx.l.google.com 30 aspmx3.googlemail.com 30 aspmx2.googlemail.com
TXT	MS=ms75579110 MS=ms92504637 atlassian-domain-verification=hVCRGjM2nyjtM2ihzsp8d/5iMeJYblf/ERARL9bQZtkDE46wGx... google-site-verification=rXlByKov4KIo4v-tNYMA4-jj4KF5KIxu-Ab8-bnLD20 pwa-site-verification=RocOo-JshdrRAsxgwQBVQlyZmpjf_4V_kmwx-koNSdE= SPF v=spf1 a include:spf.mailjet.com include:_spf.google.com include:mail.zendesk.co...
CAA	Lookup not available with standard resolver

Resolved in 5 ms

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), 45 ms total

PASS

1 redirect(s), 45 ms total

Single redirect

Got: https://geogebra.org → https://www.geogebra.org/ (308)

WWW normalization redirect

https://geogebra.org

28 ms · HTTP/1.1

308

https://www.geogebra.org/

17 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://geogebra.org	308	28 ms	HTTP/1.1	CloudFront
2	https://www.geogebra.org/	200	17 ms	HTTP/1.1	CloudFront

See the visual redirect chain in the HTTP Probe tab →

A+

Crawlability

robots.txt present, sitemap with 15 URLs

PASS

robots.txt present, sitemap with 15 URLs

robots.txt is present

Got: 279 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 15 entries

Sitemap index with 15 child sitemaps

robots.txt references sitemap

robots.txt 200 OK

Size 279 B Sitemaps referenced 5 User-agents * Blocking No — crawling allowed

User-agent: *
Disallow:
Sitemap: https://www.geogebra.org/m-sitemap-index.xml
Sitemap: https://www.geogebra.org/math-sitemap.xml
Sitemap: https://www.geogebra.org/special-sitemap.xml
Sitemap: https://www.geogebra.org/t-sitemap.xml
Sitemap: https://www.geogebra.org/u-sitemap.xml

sitemap.xml 200 OK

Type Sitemap Index URLs 15 entries Valid XML Yes

Child Sitemaps:

A+

Domain Intelligence

geogebra.org — via http.net Internet GmbH, 20 years, 6 months old, hosted on AWS

PASS

geogebra.org — via http.net Internet GmbH, 20 years, 6 months old, hosted on AWS

Domain registered until Jan 9, 2027 (8 months remaining)

DNSSEC is not enabled

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Registrar: http.net Internet GmbH

Registrar lock is NOT enabled

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.

Hosting: AWS

Got: AS16509

Domain expiry

177 days

January 9, 2027

SSL certificate

182 days

Issued by Amazon

Domain age

20 years, 6 months

Registered January 9, 2006

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

99.86.20.80

Registrar

http.net Internet GmbH

Unlocked 4 NS records

Expiry timeline

Today

+1 year

Domain expiry SSL expiry Danger zone (≤30 days)

Recommended actions

Enable DNSSEC to protect visitors from DNS spoofing
Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers

Registrar http.net Internet GmbH

Created January 9, 2006 (20 years, 6 months ago)

Expires January 9, 2027 (8 months)

Last Updated December 16, 2025

Name Servers ns-1082.awsdns-07.org, ns-1933.awsdns-49.co.uk, ns-380.awsdns-47.com, ns-548.awsdns-04.net

DNSSEC Not enabled

Hosting

IP Address 99.86.20.80

ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)

Provider AWS

Data source: rdap (0.8s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

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.

Why this matters

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

A+

HTTP Probe Timing

Total 30 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

5 ms

TCP Connect

2 ms

TLS Handshake

4 ms

Time to First Byte

30 ms

Total Time

30 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 2 ms TLS Handshake 4 ms Server Processing 19 ms Content Transfer 0 ms

A

CDN & Delivery

AWS CloudFront (Miss from cloudfront)

PASS

AWS CloudFront (Miss from cloudfront)

Site is served via AWS CloudFront CDN (edge: SIN3-P2)

Got: x-amz-cf-id: RVhJMVLxHx2V62U2w6bSMHTNlwAGJ2SiND0x5m8-YkKRpDBNFuWT7w==

CDN cache status: Miss from cloudfront

CDN Detected: AWS CloudFront

Provider AWS CloudFront Cache Status Miss from cloudfront Evidence x-amz-cf-id: RVhJMVLxHx2V62U2w6bSMHTNlwAGJ2SiND0x5m8-YkKRpDBNFuWT7w==