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https://bookdepository.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
72
GRADE
C
FIX
2
REVIEW
3
PASS
4
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
4 PASS 3 REVIEW 2 FIX
F
Redirect Chain
Action
4 redirect(s), 2173 ms total
FIX
4 redirect(s), 2173 ms total
Warning::
4 redirects before reaching final URL
Each redirect adds latency. Try to minimize the chain to 1 hop.
Info::
WWW normalization redirect
Warning::
Redirect overhead: 2173 ms total
Got: 2173 ms
Info::
Cross-domain redirect detected

https://bookdepository.com

606 ms · HTTP/1.1

301

https://amazon.com/books

716 ms · HTTP/1.1

301

https://www.amazon.com/books

245 ms · HTTP/1.1

301

https://www.amazon.com/b/ref=usbk_surl_b...

295 ms · HTTP/1.1

301

https://www.amazon.com/amz-books/store?o...

312 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://bookdepository.com301606 msHTTP/1.1Server
2https://amazon.com/books301716 msHTTP/1.1Server
3https://www.amazon.com/books301245 msHTTP/1.1Server
4https://www.amazon.com/b/ref=usbk_surl_b...301295 msHTTP/1.1Server
5https://www.amazon.com/amz-books/store?o...200312 msHTTP/1.1Server

See the visual redirect chain in the HTTP Probe tab →

Each redirect adds latency. Try to minimize the chain to 1 hop.

Why this matters

Redirect chain — each hop adds latency; combine into one redirect where possible.

Source: Google Search Central / web.dev

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

C
Crawlability
Action
robots.txt present, sitemap with 0 URLs
REVIEW
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Warning::
sitemap.xml contains invalid XML
Search engines may not be able to parse the sitemap. Fix XML validation errors.
Warning::
sitemap.xml is empty — no URLs found
An empty sitemap provides no value. Add <url> entries for your pages.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

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.

Why this matters

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.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 10240 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed
<!doctype html><html lang="en-us" class="a-no-js" data-19ax5a9jf="dingo"><!-- sp:feature:head-start -->
<head><script>var aPageStart = (new Date()).getTime();</script><meta charset="utf-8"/>
<!-- sp:end-feature:head-start -->
<!-- sp:feature:csm:head-open-part1 -->

<script type='text/javascript'>var ue_t0=ue_t0||+new Date();</script>
<!-- sp:end-feature:csm:head-open-part1 -->
<!-- sp:feature:cs-optimization -->
<meta http-equiv='x-dns-prefetch-control' content='on'>
<link rel="preconnect" href="https://images-na.ssl-images-amazon.com" crossorigin>
<link rel="preconnect" href="https://m.media-amazon.com" crossorigin>
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<!-- sp:feature:csm:head-open-part2 -->
<script type='text/javascript'>
window.ue_ihb = (window.ue_ihb || window.ueinit || 0) + 1;
if (window.ue_ihb === 1) {

var ue_csm = window,
    ue_hob = +new Date();
(function(d){var e=d.ue=d.ue||{},f=Date.now||function(){return+new Date};e.d=function(b){return f()-(b?0:d.ue_t0)};e.stub=function(b,a){if(!b[a]){var c=[];b[a]=function(){c.push([c.slice.call(arguments),e.d(),d.ue_id])};b[a].replay=function(b){for(var a;a=c.shift();)b(a[0],a[1],a[2])};b[a].isStub=1}};e.exec=function(b,a){return function(){try{return b.apply(this,arguments)}catch(c){ueLogError(c,{attribution:a||"undefined",logLevel:"WARN"})}}}})(ue_csm);


    var ue_err_chan = 'jserr-rw';
(function(d,e){function h(f,b){if(!(a.ec>a.mxe)&&f){a.ter.push(f);b=b||{};var c=f.logLevel||b.logLevel;c&&c!==k&&c!==m&&c!==n&&c!==p||a.ec++;c&&c!=k||a.ecf++;b.pageURL=""+(e.location?e.location.href:"");b.logLevel=c;b.attribution=f.attribution||b.attribution;a.erl.push({ex:f,info:b})}}function l(a,b,c,e,g){d.ueLogError({m:a,f:b,l:c,c:""+e,err:g,fromOnError:1,args:arguments},g?{attribution:g.attribution,logLevel:g.logLevel}:void 0);return!1}var k="FATAL",m="ERROR",n="WARN",p="DOWNGRADED",a={ec:0,ecf:0,
pec:0,ts:0,erl:[],ter:[],buffer:[],mxe:50,startTimer:function(){a.ts++;setInterval(function(){d.ue&&a.pec<a.ec&&d.uex("at");a.pec=a.ec},1E4)}};l.skipTrace=1;h.skipTrace=1;h.isStub=1;d.ueLogError=h;d.ue_err=a;e.onerror=l})(ue_csm,window);


var ue_id = 'PB32GTC3Q5GVGZEHWA54',
    ue_url = '/rd/uedata',
    ue_drfp = true,
    ue_navtiming = 1,
    ue_mid = 'ATVPDKIKX0DER',
    ue_sid = '145-5507177-4763309',
    ue_sn = 'www.amazon.com',
    ue_furl = 'fls-na.amazon.com',
    ue_surl = 'https://unagi.amazon.com/1/events/com.amazon.csm.nexusclient.prod',
    ue_int = 0,
    ue_fcsn = 1,
    ue_urt = 3,
    ue_rpl_ns = 'cel-rpl',
    ue_ddq = 1,
    ue_fpf = '//fls-na.amazon.com/1/batch/1/OP/ATVPDKIKX0DER:145-5507177-4763309:PB32GTC3Q5GVGZEHWA54$uedata=s:',
    ue_sbuimp = 1,
    ue_ibft = 0,
    ue_lpsi = 6000,
    ue_lob = '1',
    ue_act = '-1',
    ue_dsbl_cel = 1,

    ue_swi = 1;
var ue_viz=function(){(function(b,f,d){function g(){return(!(p in d)||0<d[p])&&(!(q in d)||0<d[q])}function h(c){if(b.ue.viz.length<w&&!r){var a=c.type;c=c.originalEvent;/^focus./.test(a)&&c&&(c.toElement||c.fromElement||c.relatedTarget)||(a=g()?f[s]||("blur"==a||"focusout"==a?t:u):t,b.ue.viz.push(a+":"+(+new Date-b.ue.t0)),a==u&&(b.ue.isl&&x("at"),r=1))}}for(var r=0,x=b.uex,a,k,l,s,v=["","webkit","o","ms","moz"],e=0,m=1,u="visible",t="hidden",p="innerWidth",q="innerHeight",w=20,n=0;n<v.length&&!e;n++)if(a=
v[n],k=(a?a+"H":"h")+"idden",e="boolean"==typeof f[k])l=a+"visibilitychange",s=(a?a+"V":"v")+"isibilityState";h({});e&&f.addEventListener(l,h,0);m=g()?1:0;d.addEventListener("resize",function(){var a=g()?1:0;m!==a&&(m=a,h({}))},{passive:!0});b.ue&&e&&(b.ue.pageViz={event:l,propHid:k})})(ue_csm,ue_csm.document,ue_csm.window)};window.ue_viz=ue_viz;

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b){return b+l}));H&&(e("id",H,l),H=0)}b&&(p&&(p=p.replace(/(.*?:)(\w|-)+/,function(a,c){return c+b})),d.ue_sid=b);c&&a.tag("page-source:"+c);d.ue_fpf=p}}function R(){var a={};return function(b){b&&(a[b]=1);b=[];for(var c in a)a[w](c)&&b.push(c);return b}}function D(d,b,c,t){t=t||+new I;var f,h;if(b||v(c)){if(d)for(h in f=b?e("t",b)||e("t",b,{}):a.t,f[d]=t,c)c[w](h)&&e(h,b,c[h]);return t}}function e(d,b,c){var e=b&&b!=a.id?a.sc[b]:a;e||(e=a.sc[b]={});"id"===d&&c&&(S=1);return e[d]=c||e[d]}function T(d,
b,c,e,f){c="on"+c;var h=b[c];K(h)?d&&(a.h[d]=h):h=function(){};b[c]=function(a){f?(e(a),h(a)):(h(a),e(a))};b[c]&&(b[c].isUeh=1)}function U(l,b,c,t){function r(b,c){var d=[b],g=0,f={},t,k;u.latency={};c?(d.push("m=1"),f[c]=1):f=a.sc;for(k in f)if(f[w](k)){var m=e("wb",k),r=e("t",k)||{},C=e("t0",k)||a.t0,q,n;if(c||2==m){q=m?g++:"";d.push("sc"+q+"="+k);var s=z,p=z;2==m&&h.csa?(p=(s=h.csa("Content",{element:{type:"scope",slotId:k}}))&&K(s))&&+C&&s("mark","t0",+C):s=p=z;for(n in r)v(r[n])||null===r[n]||
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c);m="ld"===l&&b&&e("wb",b);var n=e("id",b)||a.id;m||n===a.oid||(H=b,ea(n,(e("t",b)||{}).tc||+e("t0",b),+e("t0",b),e("pty",b),e("spty",b)));var n=e("id",b)||a.id,s=e("id2",b)||d.ue_id2,g=a.url+"?"+l+"&v="+a.v+"&id="+n,A=e("ctb",b)||e("wb",b),u={eventName:l,version:a.v,id:n,sessionId:d.ue_sid||"",obfuscatedMarketplaceId:d.ue_mid||""},x;A&&(g+="&ctb="+A);s&&(g+="&id2="+s);1<d.ueinit&&(g+="&ic="+d.ueinit);if(!("ld"!=l&&"ul"!=l||b&&b!=n)){if("ld"==l){try{h[M]&&h[M].isUeh&&(h[M]=null)}catch(L){}if(h.chrome)for(s=
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_rs:f.responseEnd,dl_:f.domLoading,di_:f.domInteractive,de_:f.domContentLoadedEventStart,_de:f.domContentLoadedEventEnd,_dc:f.domComplete,ld_:f.loadEventStart,_ld:f.loadEventEnd,ntd:(K(F.now)&&!v(O)?new I(O+F.now())-new I:0)+a.t0}),B&&E(a.t,{ty:B.type+a.t0,rc:B.redirectCount+a.t0}),X=1);a.isBFonMshop||E(a.t,{hob:d.ue_hob,hoe:d.ue_hoe});a.ifr&&(g+="&ifr=1",u.ifr=!0)}D(l,b,c,t);var y,k;m||b&&b!==n||fa(b);(c=d.ue_mbl)&&c.cnt&&!m&&(g+=c.cnt());m?e("wb",b,2):"ld"==l&&(a.lid=G(n));for(y in a.sc)if(1==e("wb",
y))break;if(m){if(a.s)return;g=r(g,null)}else c=r(g,null),c!=g&&(c=q(c),a.b=c),x&&(g+=x),g=r(g,b||a.id);g=q(g);if(a.b||m)for(y in a.sc)2==e("wb",y)&&delete a.sc[y];y=0;a._rt&&(g+="&rt="+a._rt());x=h.csa;if(!m&&x)for(k in c=e("t",b)||{},t=x("PageTiming"),c)c[w](k)&&t("mark",V[k]||k,c[k]);m||(a.s=0,(k=d.ue_err)&&0<k.ec&&k.pec<k.ec&&(k.pec=k.ec,g+="&ec="+k.ec+"&ecf="+k.ecf),y=e("ctb",b),"ld"!==l||b||a.markers?a.markers&&a.isl&&!m&&b&&E(a.markers,e("t",b)):(a.markers={},E(a.markers,e("t",b))),e("t",b,
{}));a.tag&&a.tag().length&&(g+="&csmtags="+a.tag().join("|"),u.csmtags=a.tag(),a.tag=R());k=a.viz||[];if(c=k.length)k=k.splice(0,c),g+="&viz="+k.join("|"),u.viz=k;v(d.ue_pty)||(g+="&pty="+d.ue_pty+"&spty="+d.ue_spty+"&pti="+d.ue_pti,u.pty=d.ue_pty,u.spty=d.ue_spty,u.pti=d.ue_pti);a.tabid&&(g+="&tid="+a.tabid);a.aftb&&(g+="&aftb=1");!a._ui||b&&b!=n||(g+=a._ui());g+="&lob="+(d.ue_lob||"0");a.a=g;C(g,l,y,m,b&&"string"===typeof b&&-1!==b.indexOf("csa:"));m||(u.lob=d.ue_lob||"0",(b=x&&x("UEData"))&&b("log",
u))}}function fa(a){var b=h.ue_csm_markers||{},c;for(c in b)b[w](c)&&D(c,a,z,b[c])}function A(a,b,c){c=c||h;if(c[Y])c[Y](a,b,!1);else if(c[Z])c[Z]("on"+a,b)}function W(a,b,c){c=c||h;if(c[$])c[$](a,b,!1);else if(c[aa])c[aa]("on"+a,b)}function ba(){function a(){d.onUl()}function b(a){return function(){c[a]||(c[a]=1,U(a))}}var c={},e,f;d.onLd=b("ld");d.onLdEnd=b("ld");d.onUl=b("ul");e={stop:b("os")};h.chrome?(A(J,a),N.push(a)):e[J]=d.onUl;for(f in e)e[w](f)&&T(0,h,f,e[f]);d.ue_viz&&ue_viz();A("load",
d.onLd);D("ue")}function ea(e,b,c,f,r){var p=d.ue_mbl,q=h.csa,m=q&&q("SPA"),q=q&&q("PageTiming");p&&p.ajax&&p.ajax(b,c);m&&q&&(e={requestId:e,transitionType:"soft"},"string"===typeof f&&(e.pageType=f,d.ue_pty=f),"string"===typeof r&&(e.subPageType=r,d.ue_spty=r),m("newPage",e),q("mark","transitionStart",b));a.tag("ajax-transition")}d.ueinit=(d.ueinit||0)+1;var a=d.ue=d.ue||{};a.t0=h.aPageStart||d.ue_t0;a.id=d.ue_id;a.url=d.ue_url;a.rid=d.ue_id;a.a="";a.b="";a.h={};a.s=1;a.t={};a.sc={};a.iel=[];a.ielf=
[];a.viz=[];a.v="0.344078.0";a.paused=!1;var w="hasOwnProperty",J="beforeunload",M="on"+J,Y="addEventListener",$="removeEventListener",Z="attachEvent",aa="detachEvent",V={cf:"criticalFeature",af:"aboveTheFold",fn:"functional",fp:"firstPaint",fcp:"firstContentfulPaint",bb:"bodyBegin",be:"bodyEnd",ld:"loaded"},I=h.Date,F=h.performance||h.webkitPerformance,f=(F||{}).timing,B=(F||{}).navigation,O=(f||{}).navigationStart,p=d.ue_fpf,S=0,X=0,N=[],H=0,z;a.oid=G(a.id);a.lid=G(a.id);a._t0=a.t0;a.tag=R();a.ifr=
h.top!==h.self||h.frameElem
sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML No
B
TLS Certificate Expiry & Recommendations
141 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

141
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
3 A records, 100 ms lookup
PASS
3 A records, 100 ms lookup
Info::
Resolves to 3 IPv4 address(es)
Got: 3.253.182.206, 3.254.238.16, 3.253.169.2
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1070.awsdns-05.org, ns-1584.awsdns-06.co.uk, ns-478.awsdns-59.com, ns-591.awsdns-09.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: 100 ms
Got: 100 ms
A3.253.182.206, 3.254.238.16, 3.253.169.2
AAAA—
CNAME—
NSns-1070.awsdns-05.org, ns-1584.awsdns-06.co.uk, ns-478.awsdns-59.com, ns-591.awsdns-09.net
MX
10 amazon-smtp.amazon.com
TXT
MS=ms14266476
MS=ms41277628
MS=ms41277628|
TS1760027
adobe-idp-site-verification=b6bcd3e5aaffc63607c8bf75744d9a0d1febc50dd7f389428e2a...
atlassian-domain-verification=ZT4AapXgobCpXIWoNcd7gtMjZyOUdr4EDFMnFUWrqqqgdaQVbD...
google-site-verification=JB02pgy32eH_zcwIdRubuzKZEihB2TerBtZuGTLw8Uw
SPF v=spf1 include:spf1.amazon.com include:spf2.amazon.com include:amazonses.com inc...
CAALookup not available with standard resolver
Resolved in 100 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+
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.bookdepository.com/
200https://bookdepository.com/

Preferred variant: non-www

HTTP → HTTPS

301http://bookdepository.com/ → https://bookdepository.com/

Consistent

A+
Domain Intelligence
bookdepository.com — via MarkMonitor Inc., 24 years, 7 months old, hosted on AWS
PASS
bookdepository.com — via MarkMonitor Inc., 24 years, 7 months old, hosted on AWS
Info::
Domain registered until Jan 18, 2027 (9 months remaining)
Info::
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.
Info::
Registrar: MarkMonitor Inc.
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: AWS
Got: AS16509
Domain expiry

188 days

January 18, 2027

SSL certificate

141 days

Issued by Amazon

Domain age

24 years, 7 months

Registered January 18, 2002

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

3.253.182.206

Registrar

MarkMonitor Inc.

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 MarkMonitor Inc.
Created January 18, 2002 (24 years, 7 months ago)
Expires January 18, 2027 (9 months)
Last Updated January 27, 2026
Name Servers ns-1070.awsdns-05.org, ns-1584.awsdns-06.co.uk, ns-478.awsdns-59.com, ns-591.awsdns-09.net
DNSSEC Not enabled
Hosting
IP Address 3.253.182.206
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (1.0s)

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 604 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
100 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
165 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
170 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
604 ms
Total Time Total request time from DNS lookup through full response.
605 ms

Connection waterfall

DNS Lookup 100 ms TCP Connect 165 ms TLS Handshake 170 ms Server Processing 169 ms Content Transfer 0 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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