DNS & HTTP Analysis for overleaf.com

Processing Domain overleaf.com on 14/08/2020 16:16:29


  • This tool is available free to use at GENSupport
  • Help and Support for your DNS or HTTP issues available on our Forum
  • Whenever you see a clicking on it will take you to more help
  • The version of the data model that was used in this report is 1.008
  • The version that produced this report is 1.023b

Processing DNS Records

Basic Checks

Here we check the basic functioning and security of your DNS

  • Zone Queries 6 Record Types and 13 Records Found
  • Zone Transfer Failed
  • Zone Dump
    • TXT
      • _dmarc.overleaf.com. TTL 300 "v=DMARC1; p=quarantine; rua=mailto:This email address is being protected from spambots. You need JavaScript enabled to view it.; ruf=mailto:This email address is being protected from spambots. You need JavaScript enabled to view it.;"
      • overleaf.com. TTL 300 "google-site-verification=-X9hApZ1uqsr49ba4PBLg33y2s19VcADbb7lDHGqB5g"
      • overleaf.com. TTL 300 "v=spf1 include:_spf.google.com include:u794683.wl184.sendgrid.net include:servers.mcsv.net ~all"
    • A
      • overleaf.com. TTL 300 34.73.232.153
    • MX
      • overleaf.com. TTL 300 1 aspmx.l.google.com.
      • overleaf.com. TTL 300 10 alt3.aspmx.l.google.com.
      • overleaf.com. TTL 300 10 alt4.aspmx.l.google.com.
      • overleaf.com. TTL 300 5 alt1.aspmx.l.google.com.
      • overleaf.com. TTL 300 5 alt2.aspmx.l.google.com.
    • SOA
      • overleaf.com. TTL 3600 bob.ns.cloudflare.com. dns.cloudflare.com. 2034879439 10000 2400 604800 3600
    • NS
      • overleaf.com. TTL 86400 bob.ns.cloudflare.com.
      • overleaf.com. TTL 86400 tori.ns.cloudflare.com.
    • CNAME
      • www.overleaf.com. TTL 300 k8.overleaf.com.

Nameservers

Here we check the setup of your nameservers. All nameservers on your domain should be listed in the zone and returned in an ANY query along with corresponding A and/or AAAA records resolving their address.

  • tori.ns.cloudflare.com 172.64.32.231 Found and Match. (Missing from Zone Address Records )
  • tori.ns.cloudflare.com 108.162.192.231 Found and Match. (Missing from Zone Address Records )
  • tori.ns.cloudflare.com 173.245.58.231 Found and Match. (Missing from Zone Address Records )
  • tori.ns.cloudflare.com Found and Match. (Missing from Zone Address Records )
  • bob.ns.cloudflare.com 108.162.193.104 Found and Match. (Missing from Zone Address Records )
  • bob.ns.cloudflare.com 172.64.33.104 Found and Match. (Missing from Zone Address Records )
  • bob.ns.cloudflare.com 173.245.59.104 Found and Match. (Missing from Zone Address Records )
  • bob.ns.cloudflare.com Found and Match. (Missing from Zone Address Records )
  • All Name Servers SHOULD BE on Different Subnets

Processing 3 TXT Records

DMARC Record:

The DMARC Record defines how MTA's should response when parsing DKIM and SPF records

  • v=dmarc1 (The Version of this record)
  • p=quarantine (The Policy to implement on FAIL)
  • rua=mailto:This email address is being protected from spambots. You need JavaScript enabled to view it. (Reporting URI of aggregate reports)
  • ruf=mailto:This email address is being protected from spambots. You need JavaScript enabled to view it. (Reporting URI for forensic reports)

Google Domain Verification Record

This record is used by Google to validate domain ownership when setting up Google Analytics etc

  • google-site-verification=-x9hapz1uqsr49ba4pblg33y2s19vcadbb7ldhgqb5g

SPF Record:

The SPF Record defines which IP addresses are permitted to send email on this domain's behalf

  • v=spf1 (The SPF Format Version Number)
  • include:_spf.google.com (An Include - Additional look-ups required, some server's won't bother.)
  • include:u794683.wl184.sendgrid.net (An Include - Additional look-ups required, some server's won't bother.)
  • include:servers.mcsv.net (An Include - Additional look-ups required, some server's won't bother.)
  • ~all (Permit other hosts but take note)

Processing 5 MX (Mail Exchanger) Records

These Records determine the servers (mail servers) responsible for handling your incomming email. Each service is given a priority and they will be used in that order. If all the priorities are the same then they will be used in a round-robin fashion

  • Priority 1 handled by host aspmx.l.google.com. [172.253.120.27] Valid
    • Email Handled By Google Corporation
    • Port 25 (smtp) : Open
  • Priority 10 handled by host alt3.aspmx.l.google.com. [108.177.97.27] Valid
    • Email Handled By Google Corporation
    • Port 25 (smtp) : Open
  • Priority 10 handled by host alt4.aspmx.l.google.com. [74.125.28.26] Valid
    • Email Handled By Google Corporation
    • Port 25 (smtp) : Open
  • Priority 5 handled by host alt1.aspmx.l.google.com. [209.85.233.27] Valid
    • Email Handled By Google Corporation
    • Port 25 (smtp) : Open
  • Priority 5 handled by host alt2.aspmx.l.google.com. [142.250.4.26] Valid
    • Email Handled By Google Corporation
    • Port 25 (smtp) : Open

Processing 1 CNAME (Alias) Records

These records are aliases making one hostname relate to another. These are often used to match hosts back to clusters or internal referencs that may change.

  • www.overleaf.com. k8.overleaf.com.

Processing 1 A (IPv4 Address) Records

These records define the IP Addresse(s) of the servers responsible for hosting your webiste and other resouces on your domain. The www record is the most common one and will be used to identify your website address

  • Host: overleaf.com. = IP: [34.73.232.153] Valid Reachable (86.026ms)

Processing AAAA (IPv6 Address) Records

These records define the IP Addresse(s) of the servers responsible for hosting your webiste and other resouces on your domain

    Processing Domain Public Records

      Domain Name WHOIS Information - overleaf.com

      • Domain Name OVERLEAF.COM
      • Registry Domain ID 1505978433_DOMAIN_COM-VRSN
      • Registrar WHOIS Server whois.godaddy.com
      • Registrar URL: http://www.godaddy.com
      • Updated Date: 2019-07-01T09:22:23Z
      • Creation Date: 2008-07-02T18:33:22Z
      • Registry Expiry Date: 2021-07-02T18:33:22Z
      • Registrar GoDaddy.com, LLC
      • Registrar IANA ID 146
      • Registrar Abuse Contact Email This email address is being protected from spambots. You need JavaScript enabled to view it.
      • Registrar Abuse Contact Phone 480-624-2505
      • Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
      • Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
      • Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
      • Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
      • Name Server BOB.NS.CLOUDFLARE.COM
      • Name Server TORI.NS.CLOUDFLARE.COM
      • DNSSEC unsigned
      • URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/

      Website Hosting WHOIS Information - 34.73.232.153

      • NetRange 34.64.0.0 - 34.127.255.255
      • CIDR 34.64.0.0/10
      • NetHandle NET-34-64-0-0-1
      • Parent NET34 (NET-34-0-0-0-0)
      • NetType Direct Allocation
      • OriginAS
      • Organization Google LLC (GOOGL-2)
      • RegDate 2018-09-28
      • Updated 2018-09-28
      • Ref: https://rdap.arin.net/registry//ip/34.64.0.0
      • OrgName Google LLC
      • OrgId GOOGL-2
      • Address 1600 Amphitheatre Parkway
      • City Mountain View
      • StateProv CA
      • PostalCode 94043
      • Country US
      • RegDate 2006-09-29
      • Updated 2019-11-01
      • Ref: https://rdap.arin.net/registry//entity/GOOGL-2
      • OrgTechHandle ZG39-ARIN
      • OrgTechName Google LLC
      • OrgTechPhone +1-650-253-0000
      • OrgTechEmail arin-contact@google.com
      • OrgTechRef: https://rdap.arin.net/registry//entity/ZG39-ARIN
      • OrgAbuseHandle GCABU-ARIN
      • OrgAbuseName GC Abuse
      • OrgAbusePhone +1-650-253-0000
      • OrgAbuseEmail google-cloud-compliance@google.com
      • OrgAbuseRef: https://rdap.arin.net/registry//entity/GCABU-ARIN
      • OrgNOCHandle GCABU-ARIN
      • OrgNOCName GC Abuse
      • OrgNOCPhone +1-650-253-0000
      • OrgNOCEmail google-cloud-compliance@google.com
      • OrgNOCRef: https://rdap.arin.net/registry//entity/GCABU-ARIN

    Processing Website

      Website Headers for www.overleaf.com

      We will obtain the headers from your website and parse them for validity

      • Web Server Header is Missing
      • Request Response HTTP/1.1 308 Permanent Redirect
      • SSL is available and enabled
        • /C=GB/L=London/O=Writelatex Limited/CN=*.overleaf.comGB
        • Locality London
        • Organisation Writelatex Limited
        • Certificate Scope *.overleaf.com
        Certificate Issuer
        • Country US
        • Organisation GoDaddy.com, Inc.
        • Certificate Scope Go Daddy Secure Certificate Authority - G2
        Certificate Validity
        • Valid From 190722115314Z
        • Valid To 210809151001Z
        Certificate Ciphers
        • SN RSA-SHA256
        • LN sha256WithRSAEncryption
        Certificate Extensions
        • Alternative Hostnames DNS:*.overleaf.com, DNS:overleaf.com
        • Key Usage TLS Web Server Authentication, TLS Web Client Authentication
    • There was no redirection
    • General

      • allow Valid methods for a specified resource after a 405 : Missing
      • location For Redirects specifies the target [https://www.overleaf.com/]
      • connection Control options for the current connection [keep-alive]
      • x-powered-by Specifies Technology in use - Security Risk : Missing
      • x-aspnet-version Specifies the ASP.net version - Security Risk : Missing
      • accept-ranges To advertise its support of partial requests : Missing
      • link Used to express typed relationship with another resource : Missing
      • upgrade HTTP/2 (The latest and faster version of HTTP is available : Missing

      Security

      • referrer-policy Modifies the algorithm used to populate the Referer Header : Missing
      • x-xss-protection Prevents pages loading when XSS is detected : Missing
      • feature-policy Allow or Deny the use of browser features : Missing
      • p3p Platform for Privacy Preferences : Missing
      • content-security-policy CSP Content Security Policy : Missing
      • x-frame-options Can we open this response in an iframe : Missing

      Cross Origin

      • access-control-allow-origin Can we share the response with the given origin : Missing
      • access-control-allow-credentials Tells Browsers whether to expose the response to frontend JavaScript : Missing
      • access-control-expose-headers Indicates which headers can be exposed as part of the Response : Missing
      • access-control-max-age Indicates how long the results of a preflight request can be stored : Missing
      • access-control-allow-methods Methods allowed when accessing the resource in response to a preflight request : Missing
      • access-control-allow-headers Indicates which headers can be used during the actual request : Missing

      Content

      • content-language The natural language or languages of the intended audience : Missing
      • transfer-encoding The form of encoding used : Missing
      • content-length The length of the response body [168]
      • content-type The Media type of the Response Body [text/html]
      • date The date and time of generation [Fri, 14 Aug 2020 16:11:36 GMT]
      • content-disposition An opportunity to raise a File Download dialogue box : Missing
      • content-encoding The type of encoding/compression used on the Response : Missing
      • content-location An alternate location for the returned data : Missing
      • content-range Where in a full body message this partial message belongs : Missing
      • etag An identifier for a specific version of a resource : Missing
      • vary how to match future request headers : Missing
      • x-content-type-options Types in Content-Type should NOT be changed : Missing

      Cache

      • cache-control Tells caches whether they may cache this object : Missing
      • expires Gives the date/time after which the response is considered stale : Missing
      • last-modified The last modified date for the requested object : Missing
      • pragma Implementation-specific fields for caching : Missing
      • x-cache-action From an Intermediate cache : Missing
      • x-cache-hits Intermediate Cache Hits count : Missing
      • x-cache-age Intermediate Cache Content Age : Missing
      • via Informs the client of proxies through which the response was sent : Missing
      • age The Age this page has been cached in a proxy : Missing
      • x-served-by The Cache that served this response : Missing
      • x-cache Indicates if the cache served cached content : Missing
      • x-via-fastly Specific headers from Fastly : Missing

      Strict Transport Security (HSTS) Policy

      • strict-transport-security A HSTS Policy for the client with scope : Missing

      Cookies and Fragments

      • set-cookie Cookie Data to store locally : Missing

      Other

      • x-backend-server Identifies the backend server providing this response : Missing
      • x-robots-tag Search engine Robot Directive : Missing
      • gen Used by some of the GEN Tools to verify zone ownership : Missing
      • cf-cache-status Cloudflare Specific Header indicating cache status for this response : Missing
      • x-aspnetmvc-version ASP MVC Version Number - Security Risk : Missing

    Robots.txt

    • You have a robots.txt file and it appears to be valid
      • Allow Entries (1) - Specific Allow
        • Disallow Entries (9) - Specific Disallow
          • Sitemap Entries (0) - Sitemaps
            • Other Entries (6)

          Processing Website Profile Data

            Website Render for www.overleaf.com

            Technology Profile overleaf.com

            We will check for fingerprints of common website technologies

              • Failed to succesfully profile the website, it is likely either custom or plain HTML.

            MOZ Rank Profile http://www.overleaf.com/

            We will retrieve your Ranking Profile from Moz.com

            • 385509 The number of external, equity links
            • 435953 The number of internal and external equity and non-equity links
            • 58 The Domain Authority (DA) ( 0->100 )
            • 56 The Page Authority (PA) ( 0->100 )
            • 5.599999905 The MozRank of the Domain ( 0->10 )

            Google Safe Browsing http://www.overleaf.com/

            We will retrieve Safe Browsing Status from Google

            • This site is NOT listed as being unsafe by Google

            PhishTank Lookup http://www.overleaf.com/

            We will check PhishTank to see if your site is listed

            • This site is NOT listed as being unsafe by PhishTank

            Alexa Rank Profile http://www.overleaf.com/

            We will retrieve your Ranking Profile from Alexa.com

            • The number of external in links
            • Un-Ranked Your Alexa Rank

            Meta Profile http://www.overleaf.com/

            We will check the entire body for metadata

            • twitter:title : Overleaf, Online LaTeX Editor
            • og:title : Overleaf, Online LaTeX Editor
            • description : An online LaTeX editor that's easy to use. No installation, real-time collaboration, version control, hundreds of LaTeX templates, and more.
            • image : https://cdn.overleaf.com/img/ol-brand/overleaf_og_logo.png
            • twitter:card : summary
            • twitter:site : @overleaf
            • twitter:description : An online LaTeX editor that's easy to use. No installation, real-time collaboration, version control, hundreds of LaTeX templates, and more.
            • twitter:image : https://cdn.overleaf.com/img/ol-brand/overleaf_og_logo.png
            • viewport : width=device-width, initial-scale=1.0, user-scalable=yes

          Processing Completed

          • Performance Profile
            • DNS Lookups : 0.18 seconds
            • DNS Folding/Unfolding : 0.00 seconds
            • DNS Nameserver Checks : 0.00 seconds
            • DNS TXT Records : 0.00 seconds
            • DNS MX Records : 0.78 seconds
            • DNS CNAME : 0.00 seconds
            • DNS Address : 0.10 seconds
            • WHOIS Lookups : 0.47 seconds
            • First CURL : 0.20 seconds
            • SSL Lookup : 0.72 seconds
            • Header Parsing : 0.00 seconds
            • Robots.txt Parsing : 0.36 seconds
            • Website Profile : 4.96 seconds
            • Website MozData : 0.28 seconds
            • Safe Browsing : 0.21 seconds
            • PhishTank : 0.05 seconds
            • Website Alexa : 0.51 seconds
            • Website META : 0.54 seconds

          The process is now completed and the results are shown above. The raw processing data is available HERE. Please take a moment to consider each test and its response. DNS, SMTP and HTTP are not simple protocols and it is way beyond the scope of this tool to suggest improvements, but you are welcome to request assistance via our Forum.