Infrastructure - https://uw.edu.pl BeaverCheck Audit

B

Redirect Chain

1 redirect(s), 2277 ms total

REVIEW

1 redirect(s), 2277 ms total

Single redirect

Got: https://uw.edu.pl → https://www.uw.edu.pl/ (301)

WWW normalization redirect

Redirect overhead: 2277 ms total

Got: 2277 ms

https://uw.edu.pl

952 ms · HTTP/1.1

301

https://www.uw.edu.pl/

1326 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://uw.edu.pl	301	952 ms	HTTP/1.1	Apache/2.4.62 (Debian)
2	https://www.uw.edu.pl/	200	1326 ms	HTTP/1.1	Apache/2.4.62 (Debian)

See the visual redirect chain in the HTTP Probe tab →

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

C

URL Variants

Action

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→HTTPS redirect uses 302 instead of 301

Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

200https://www.uw.edu.pl/

200https://uw.edu.pl/

Inconsistent — duplicate content risk

HTTP → HTTPS

302http://uw.edu.pl/ → https://uw.edu.pl/

Use 301 (permanent) instead of 302 (temporary)

B

HTTP Probe Timing

Total 999 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

REVIEW

DNS Lookup

174 ms

TCP Connect

154 ms

TLS Handshake

469 ms

Time to First Byte

1000 ms

Total Time

1000 ms

Connection waterfall

DNS Lookup 174 ms TCP Connect 154 ms TLS Handshake 469 ms Server Processing 203 ms Content Transfer 0 ms

C

TLS Certificate Expiry & Recommendations

Action

20 days until leaf cert expires — 5 issues to address

REVIEW

Certificate validity

20

days left

0d 30d 60d 90d+

Renew soon — under 30 days remaining

Recommended actions

Renew certificate — 20 days remaining
Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
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

B

CDN & Delivery

Varnish

REVIEW

Varnish

Site is served via Varnish CDN

Got: via: 1.1 varnish (Varnish/5.0)

CDN Detected: Varnish

Provider Varnish Evidence via: 1.1 varnish (Varnish/5.0)

A+

DNS Records

1 A records, 168 ms lookup

PASS

1 A records, 168 ms lookup

Resolves to 1 IPv4 address(es)

Got: 193.0.115.152

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

No IPv6 (AAAA) records

6 nameserver(s) configured

Got: ns2.net.icm.edu.pl, ns2.uw.edu.pl, ns1.uw.edu.pl, arwena.nask.waw.pl, wask.wask.wroc.pl, ns1.net.icm.edu.pl

3 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: 168 ms

Got: 168 ms

A	193.0.115.152
AAAA	—
CNAME	—
NS	ns2.net.icm.edu.pl, ns2.uw.edu.pl, ns1.uw.edu.pl, arwena.nask.waw.pl, wask.wask.wroc.pl, ns1.net.icm.edu.pl
MX	1 ASPMX.L.GOOGLE.COM 5 ALT1.ASPMX.L.GOOGLE.COM 5 ALT2.ASPMX.L.GOOGLE.COM
TXT	ZOOM_verify_FPq5Vq6mA5vDC7Xr14n5W6 SPF v=spf1 ip4:193.0.65.128/27 ip4:193.0.72.2 ip4:193.0.72.144 include:_spf.google.c... mojecertpl-site-verification-SHTg1QJlG3L1OfActZVGYVwLbZyydQN1 google-site-verification=9bxiqefMY9pOwsk0p9aTflYRgk2BpB-Rmh35GjlL3sc google-site-verification=emEHyVA9-mgt7vuyQxn9pPuyUHJ-Y3O_eC0v9db_8RI HARICA-aqRkL4h1GFy3qBuPdXP MS=9B6B4F4D1E13DCD9C42DA37212BC9C7CDBBD9E40 google-site-verification=BxTj-GBfIWLtL_SxtzjTowFvVJjGl9Yu9VDvLlqvdJ8 google-site-verification=zj1ZJZ-lHoMsuNDCOmyfKcVRY8DkWZKukZWx4v1n1M0 google-site-verification=bqgMVFeuUu77cbQfjeOTda3O7CBEvMf0s-jP1gcKLz8
CAA	Lookup not available with standard resolver

Resolved in 168 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+

Crawlability

robots.txt present, sitemap with 8 URLs

PASS

robots.txt present, sitemap with 8 URLs

robots.txt is present

Got: 206 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 8 entries

Sitemap index with 8 child sitemaps

robots.txt references sitemap

robots.txt 200 OK

Size 206 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed

User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php
Disallow: /?s=
Disallow: /&s=
Disallow: /search/
Disallow: /readme.html
Disallow: /license.txt

Sitemap: https://www.uw.edu.pl/sitemap.xml

sitemap.xml 200 OK

Type Sitemap Index URLs 8 entries Valid XML Yes

Child Sitemaps:

A+

Domain Intelligence

uw.edu.pl — via Domena.pl sp. z o.o., 31 years, 9 months old, hosted on UW-AS, PL

PASS

uw.edu.pl — via Domena.pl sp. z o.o., 31 years, 9 months old, hosted on UW-AS, PL

Domain registered until Dec 31, 2031 (5 years, 9 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: Domena.pl sp. z o.o.

Hosting: UW-AS, PL

Got: AS8890

Domain expiry

2027 days

December 31, 2031

SSL certificate

20 days

Issued by Hellenic Academic and Research Institutions CA

Domain age

31 years, 9 months

Registered January 1, 1995

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

UW-AS, PL

ASN AS8890

193.0.115.152

Registrar

Domena.pl sp. z o.o.

Lock status unknown 6 NS records

Expiry timeline

Today

+1 year

Domain expiry SSL expiry Danger zone (≤30 days)

Recommended actions

Renew the TLS certificate or verify auto-renewal is working
Enable DNSSEC to protect visitors from DNS spoofing

Registrar Domena.pl sp. z o.o.

Created January 1, 1995 (31 years, 9 months ago)

Expires December 31, 2031 (5 years, 9 months)

Last Updated December 16, 2021

Name Servers wask.wask.wroc.pl, ns2.net.icm.edu.pl, ns1.net.icm.edu.pl, ns1.uw.edu.pl, arwena.nask.waw.pl, ns2.uw.edu.pl

DNSSEC Not enabled

Hosting

IP Address 193.0.115.152

ASN AS8890 (UW-AS, PL)

Provider UW-AS, PL

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