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https://academic.ru

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
6
INFO
0
Probed from Madrid, Spain
200 OK
Checks
9
6 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.

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
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
TLS Certificate Expiry & Recommendations
59 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

59
days left
0d 30d 60d 90d+

Recommended actions

  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • 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, 90 ms lookup
PASS
1 A records, 90 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 178.130.57.37
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: pns3.cloudns.net, pns2.cloudns.net, pns4.cloudns.net, pns1.cloudns.net
Info::
7 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: 90 ms
Got: 90 ms
A178.130.57.37
AAAA—
CNAME—
NSpns3.cloudns.net, pns2.cloudns.net, pns4.cloudns.net, pns1.cloudns.net
MX
0 aspmx.l.google.com
10 alt1.aspmx.l.google.com
12 alt2.aspmx.l.google.com
20 aspmx3.googlemail.com
20 aspmx4.googlemail.com
20 aspmx2.googlemail.com
20 aspmx5.googlemail.com
TXT
_globalsign-domain-verification=n2ErEIOjNi-dzbYO8sA23LA7kxhjIceR0CNEhT5DY0
SPF v=spf1 include:_spf.google.com ~all
yandex-verification: 0987808e633a7399
yandex-verification: f982b13f1def2a94
ncs374y0gg3vp0x10g0cssj58jy79330
CAALookup not available with standard resolver
Resolved in 90 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
0 redirect(s), 274 ms total
PASS
0 redirect(s), 274 ms total

https://academic.ru

274 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://academic.ru429274 msHTTP/1.1nginx
A+
Crawlability
robots.txt present, sitemap with 426 URLs
PASS
robots.txt present, sitemap with 426 URLs
Info::
robots.txt is present
Got: 554 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 426 entries
Info::
Sitemap index with 426 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 554 B Sitemaps referenced 1 User-agents BLEXBot, dotbot, FlipboardProxy, *, MJ12bot, aiHitBot, LinkpadBot, Knowledge AI, FemtosearchBot, SemrushBot, AhrefsBot, Riddler, trovitBot, Detectify Blocking No — crawling allowed
User-agent: *
Disallow:
Crawl-delay: 0.9
Sitemap: https://academic.ru/sitemaps/academic.ru/dic_index.xml

User-agent: MJ12bot
Disallow: /
User-agent: SemrushBot
Disallow: /
User-agent: AhrefsBot
Disallow: /
User-agent: Riddler
Disallow: /
User-agent: aiHitBot
Disallow: /
User-agent: trovitBot
Disallow: /
User-agent: Detectify
Disallow: /
User-agent: BLEXBot
Disallow: /
User-agent: LinkpadBot
Disallow: /
User-agent: dotbot
Disallow: /
User-agent: FlipboardProxy
Disallow: /
User-agent: Knowledge AI
Disallow: /
User-agent: FemtosearchBot
Disallow: *
sitemap.xml 200 OK
Type Sitemap Index URLs 426 entries Valid XML Yes
Child Sitemaps:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.academic.ru/
200https://academic.ru/

Preferred variant: non-www

HTTP → HTTPS

301http://academic.ru/ → https://academic.ru/

Consistent

A+
Domain Intelligence
academic.ru — via RU-CENTER-RU, 25 years, 8 months old, hosted on SELECTEL-MSK, RU
PASS
academic.ru — via RU-CENTER-RU, 25 years, 8 months old, hosted on SELECTEL-MSK, RU
Info::
Domain registered until Dec 19, 2026 (8 months remaining)
Info::
Registrar: RU-CENTER-RU
Warning::
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.
Info::
Hosting: SELECTEL-MSK, RU
Got: AS50340
Domain expiry

189 days

December 19, 2026

SSL certificate

59 days

Issued by GlobalSign nv-sa

Domain age

25 years, 8 months

Registered December 17, 2000

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

SELECTEL-MSK, RU

ASN AS50340

178.130.57.37

Registrar

RU-CENTER-RU

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar RU-CENTER-RU
Created December 17, 2000 (25 years, 8 months ago)
Expires December 19, 2026 (8 months)
Name Servers pns1.cloudns.net, pns2.cloudns.net, pns3.cloudns.net, pns4.cloudns.net
Hosting
IP Address 178.130.57.37
ASN AS50340 (SELECTEL-MSK, RU)
Provider SELECTEL-MSK, RU
Data source: whois (0.7s)

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 456 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.
68 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
80 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
456 ms
Total Time Total request time from DNS lookup through full response.
457 ms

Connection waterfall

DNS Lookup 46 ms TCP Connect 68 ms TLS Handshake 80 ms Server Processing 262 ms Content Transfer 1 ms
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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