introcs.cs.princeton.edu Open in urlscan Pro
128.112.136.61 Public Scan

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Submitted URL:
https://introcs.cs.princeton.edu/
Effective URL:
https://introcs.cs.princeton.edu/java/home/
Submission Tags: falconsandbox
Submission: On July 22 via api (July 22nd 2021, 1:58:04 pm UTC) from US

Summary HTTP 10 Redirects Behaviour Indicators

Summary

This website contacted 3 IPs in 1 countries across 2 domains to perform 10 HTTP transactions. The main IP is 128.112.136.61, located in Bordentown, United States and belongs to PRINCETON-AS, US. The main domain is introcs.cs.princeton.edu.
TLS certificate: Issued by R3 on June 28th 2021. Valid for: 3 months.

This is the only time introcs.cs.princeton.edu was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

	IP Address	AS Autonomous System
2 4	128.112.136.61 128.112.136.61	88 (PRINCETON-AS) (PRINCETON-AS)
1	2606:4700::68... 2606:4700::6810:125e	13335 (CLOUDFLAR...) (CLOUDFLARENET)
10	3

4 128.112.136.61 (Bordentown, United States) 2 redirects

ASN88 (PRINCETON-AS, US)
PTR: wwwprx2.cs.princeton.edu

introcs.cs.princeton.edu	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 2606:4700::6810:125e (United States)

ASN13335 (CLOUDFLARENET, US)

cdnjs.cloudflare.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

	Apex Domain Subdomains	Transfer
4	princeton.edu 2 redirects introcs.cs.princeton.edu algs4.cs.princeton.edu Failed	28 KB
1	cloudflare.com cdnjs.cloudflare.com	17 KB
10	2

	Domain	Requested by
4	introcs.cs.princeton.edu	2 redirects introcs.cs.princeton.edu
1	cdnjs.cloudflare.com	introcs.cs.princeton.edu
0	algs4.cs.princeton.edu Failed	introcs.cs.princeton.edu
10	3

This site contains no links.

Subject Issuer	Validity	Valid
introcs.cs.princeton.edu R3	`2021-06-28` - `2021-09-26`	3 months	crt.sh
sni.cloudflaressl.com Cloudflare Inc ECC CA-3	`2020-10-21` - `2021-10-20`	a year	crt.sh

This page contains 1 frames:

Primary Page: https://introcs.cs.princeton.edu/java/home/
Frame ID: 5A117F47EC5BAE9B94562CD063954EE4
Requests: 10 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Page URL History Show full URLs

https://introcs.cs.princeton.edu/ HTTP 302
https://introcs.cs.princeton.edu/java/home HTTP 301
https://introcs.cs.princeton.edu/java/home/ Page URL

Detected technologies

PHP (Programming Languages) Expand

Overall confidence: 100%
Detected patterns

headers server /php\/?([\d.]+)?/i

OpenSSL (Web Server Extensions) Expand

Overall confidence: 100%
Detected patterns

headers server /OpenSSL(?:\/([\d.]+[a-z]?))?/i

Apache (Web Servers) Expand

Overall confidence: 100%
Detected patterns

headers server /(?:Apache(?:$|\/([\d.]+)|[^/-])|(?:^|\b)HTTPD)/i

Page Statistics

10
Requests

30 %
HTTPS

50 %
IPv6

2
Domains

3
Subdomains

3
IPs

1
Countries

45 kB
Transfer

88 kB
Size

0
Cookies

0 Outgoing links

These are links going to different origins than the main page.

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

https://introcs.cs.princeton.edu/ HTTP 302
https://introcs.cs.princeton.edu/java/home HTTP 301
https://introcs.cs.princeton.edu/java/home/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

10 HTTP transactions
0 data transactions

Method
Protocol Status Resource
Path Size
x-fer Time
Latency Type
MIME-Type IP
Location

GET
H/1.1

200
OK

Primary Request / Show response
introcs.cs.princeton.edu/java/home/
Redirect Chain

https://introcs.cs.princeton.edu/
https://introcs.cs.princeton.edu/java/home
https://introcs.cs.princeton.edu/java/home/

21 KB
21 KB

153ms
152ms

Document
text/html

128.112.136.61
PRINCETON-AS

General

Check archive.org

Show headers Download Go to

Full URL: https://introcs.cs.princeton.edu/java/home/
Protocol: HTTP/1.1
Security: TLS 1.2, ECDHE_RSA, AES_256_GCM
Server: 128.112.136.61 Bordentown, United States, ASN88 (PRINCETON-AS, US),
Reverse DNS: wwwprx2.cs.princeton.edu
Software: Apache/2.4.41 (Springdale Linux) OpenSSL/1.0.2k-fips mod_fcgid/2.3.9 PHP/5.6.25 Phusion_Passenger/5.0.30 / PHP/5.6.25
Resource Hash: d18e5bc17d7935a45ea7e6756a0b9fa4725fdfbe7fa2cb16ef5933d82dfcdb53

Request headers

Host: introcs.cs.princeton.edu
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

Date: Thu, 22 Jul 2021 13:57:26 GMT
Server: Apache/2.4.41 (Springdale Linux) OpenSSL/1.0.2k-fips mod_fcgid/2.3.9 PHP/5.6.25 Phusion_Passenger/5.0.30
X-Powered-By: PHP/5.6.25
Content-Type: text/html; charset=UTF-8
Keep-Alive: timeout=5, max=98
Connection: Keep-Alive
Transfer-Encoding: chunked

Redirect headers

Date: Thu, 22 Jul 2021 13:57:26 GMT
Server: Apache/2.4.41 (Springdale Linux) OpenSSL/1.0.2k-fips mod_fcgid/2.3.9 PHP/5.6.25 Phusion_Passenger/5.0.30
Location: https://introcs.cs.princeton.edu/java/home/
Content-Length: 251
Content-Type: text/html; charset=iso-8859-1
Keep-Alive: timeout=5, max=99
Connection: Keep-Alive

GET
H/1.1 200
OK introcs.css
introcs.cs.princeton.edu/ 6 KB
6 KB 236ms
137ms Stylesheet
text/css 128.112.136.61
PRINCETON-AS

General

Check archive.org

Show headers Download Go to

Full URL: https://introcs.cs.princeton.edu/introcs.css
Requested by: Host: introcs.cs.princeton.edu
URL: https://introcs.cs.princeton.edu/java/home/
Protocol: HTTP/1.1
Security: TLS 1.2, ECDHE_RSA, AES_256_GCM
Server: 128.112.136.61 Bordentown, United States, ASN88 (PRINCETON-AS, US),
Reverse DNS: wwwprx2.cs.princeton.edu
Software: Apache/2.4.41 (Springdale Linux) OpenSSL/1.0.2k-fips mod_fcgid/2.3.9 PHP/5.6.25 Phusion_Passenger/5.0.30 /
Resource Hash: 5a8845a59c8731c02f498af143d190a568777df54102a519e929b0cd8fabab20

Request headers

Pragma: no-cache
Sec-Fetch-Site: same-origin
Accept-Encoding: gzip, deflate, br
Host: introcs.cs.princeton.edu
Accept-Language: en-US
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36
Sec-Fetch-Mode: no-cors
Accept: text/css,*/*;q=0.1
Cache-Control: no-cache
Sec-Fetch-Dest: style
Referer: https://introcs.cs.princeton.edu/java/home/
Connection: keep-alive
Referer: https://introcs.cs.princeton.edu/java/home/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

Date: Thu, 22 Jul 2021 13:57:27 GMT
Last-Modified: Fri, 21 Dec 2018 13:00:08 GMT
Server: Apache/2.4.41 (Springdale Linux) OpenSSL/1.0.2k-fips mod_fcgid/2.3.9 PHP/5.6.25 Phusion_Passenger/5.0.30
ETag: "178a-57d87d3a0c843"
Content-Type: text/css
Connection: Keep-Alive
Accept-Ranges: bytes
Keep-Alive: timeout=5, max=97
Content-Length: 6026

GET
H2 200 MathJax.js Show response
cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/ 62 KB
17 KB 26ms
25ms Script
application/javascript 2606:4700::6810:125e
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML

Requested by

Host: introcs.cs.princeton.edu
URL: https://introcs.cs.princeton.edu/java/home/

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700::6810:125e , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

48344fd55558bbeb600062a175d052979f9ece87c7299788f8ecf16a46c87bf6

Security Headers

Name	Value
Strict-Transport-Security	max-age=15780000
X-Content-Type-Options	nosniff

Request headers

Referer: https://introcs.cs.princeton.edu/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Response headers

date: Thu, 22 Jul 2021 13:57:26 GMT
content-encoding: br
x-content-type-options: nosniff
cf-cache-status: HIT
nel: {"report_to":"cf-nel","max_age":604800}
age: 55092
cross-origin-resource-policy: cross-origin
alt-svc: h3-27=":443"; ma=86400, h3-28=":443"; ma=86400, h3-29=":443"; ma=86400, h3=":443"; ma=86400
content-length: 16889
timing-allow-origin: *
last-modified: Mon, 04 May 2020 16:13:07 GMT
server: cloudflare
cf-cdnjs-via: cfworker/kv
etag: "5eb03f13-f648"
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
strict-transport-security: max-age=15780000
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=6xYBck2VPEeFofnpQJzbGs88ihZvs3DhFwv%2BxCU8wwdhAkH4dJumm4%2Fd1zwjmTXbWk%2FfqwWbBcH96uVdrOBksyvjvPQWgJdM0%2BbrPrUJYgs2yood0OCNgvD8722i8EAVrrnuouSiIqkPE0jqk7CyPKiR"}],"group":"cf-nel","max_age":604800}
content-type: application/javascript; charset=utf-8
access-control-allow-origin: *
vary: Accept-Encoding
cache-control: public, max-age=30672000
accept-ranges: bytes
cf-ray: 672d2d9aefd397b4-FRA
expires: Tue, 12 Jul 2022 13:57:26 GMT

GET swfobject.js
algs4.cs.princeton.edu/media/ 0
0

GET cover.png
introcs.cs.princeton.edu/java/ 0
0

GET cover-python.png
introcs.cs.princeton.edu/java/ 0
0

GET cover.png
algs4.cs.princeton.edu/ 0
0

GET cover-java2e.png
introcs.cs.princeton.edu/java/ 0
0

GET cover-cs.png
introcs.cs.princeton.edu/java/ 0
0

GET link-icons.css
algs4.cs.princeton.edu/css/ 0
0

Failed requests

These URLs were requested, but there was no response received. You will also see them in the list above.

Domain: algs4.cs.princeton.edu
URL: https://algs4.cs.princeton.edu/media/swfobject.js

Domain: introcs.cs.princeton.edu
URL: https://introcs.cs.princeton.edu/java/cover.png

Domain: introcs.cs.princeton.edu
URL: https://introcs.cs.princeton.edu/java/cover-python.png

Domain: algs4.cs.princeton.edu
URL: https://algs4.cs.princeton.edu/cover.png

Domain: introcs.cs.princeton.edu
URL: https://introcs.cs.princeton.edu/java/cover-java2e.png

Domain: introcs.cs.princeton.edu
URL: https://introcs.cs.princeton.edu/java/cover-cs.png

Domain: algs4.cs.princeton.edu
URL: https://algs4.cs.princeton.edu/css/link-icons.css

Verdicts & Comments Add Verdict or Comment

11 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

0 Cookies

Cookies are little pieces of information stored in the browser of a user. Whenever a user visits the site again, he will also send his cookie values, thus allowing the website to re-identify him even if he changed locations. This is how permanent logins work.

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

algs4.cs.princeton.edu
cdnjs.cloudflare.com
introcs.cs.princeton.edu
algs4.cs.princeton.edu
introcs.cs.princeton.edu
128.112.136.61
2606:4700::6810:125e
48344fd55558bbeb600062a175d052979f9ece87c7299788f8ecf16a46c87bf6
5a8845a59c8731c02f498af143d190a568777df54102a519e929b0cd8fabab20
d18e5bc17d7935a45ea7e6756a0b9fa4725fdfbe7fa2cb16ef5933d82dfcdb53

introcs.cs.princeton.edu Open in urlscan Pro 128.112.136.61 Public Scan

Summary

urlscan.io Verdict: No classification

Domain & IP information

Screenshot Live screenshot Full Image

Page URL History Show full URLs

Detected technologies

Page Statistics

10 Requests

30 %HTTPS

50 %IPv6

2 Domains

3 Subdomains

3 IPs

1 Countries

45 kBTransfer

88 kBSize

0 Cookies

0 Outgoing links

Page URL History

Redirected requests

10 HTTP transactions Everything HTML Script AJAX CSS Image Expand all 0 data transactions

Request headers

Response headers

Redirect headers

Request headers

Response headers

Request headers

Response headers

Failed requests

Verdicts & Comments Add Verdict or Comment

11 JavaScript Global Variables

0 Cookies

Indicators

introcs.cs.princeton.edu Open in urlscan Pro
128.112.136.61 Public Scan

Screenshot
Live screenshot

Full Image

10
Requests

30 %
HTTPS

50 %
IPv6

2
Domains

3
Subdomains

3
IPs

1
Countries

45 kB
Transfer

88 kB
Size

0
Cookies

10 HTTP transactions
0 data transactions