URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Submission: On August 26 via api from US — Scanned from CA

Summary

This website contacted 2 IPs in 1 countries across 2 domains to perform 24 HTTP transactions. The main IP is 66.172.12.251, located in Philadelphia, United States and belongs to VPLS-GLOBAL, US. The main domain is vitalik.ca.
TLS certificate: Issued by R3 on July 13th 2022. Valid for: 3 months.
This is the only time vitalik.ca was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
23 66.172.12.251 4213 (VPLS-GLOBAL)
1 2600:9000:202... 16509 (AMAZON-02)
24 2
Apex Domain
Subdomains
Transfer
23 vitalik.ca
vitalik.ca
4 MB
1 hackmd.io
assets.hackmd.io — Cisco Umbrella Rank: 630408
37 KB
24 2
Domain Requested by
23 vitalik.ca vitalik.ca
1 assets.hackmd.io vitalik.ca
24 2
Subject Issuer Validity Valid
vitalik.ca
R3
2022-07-13 -
2022-10-11
3 months crt.sh
*.hackmd.io
Amazon
2021-10-19 -
2022-11-16
a year crt.sh

This page contains 1 frames:

Primary Page: https://vitalik.ca/general/2019/12/07/quadratic.html
Frame ID: 8375ABE0A88F75E192F9912CBF488651
Requests: 24 HTTP requests in this frame

Screenshot

Page Title

Quadratic Payments: A Primer

Page Statistics

24
Requests

100 %
HTTPS

50 %
IPv6

2
Domains

2
Subdomains

2
IPs

1
Countries

3863 kB
Transfer

3876 kB
Size

0
Cookies

Redirected requests

There were HTTP redirect chains for the following requests:

24 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request quadratic.html
vitalik.ca/general/2019/12/07/
37 KB
15 KB
Document
General
Full URL
https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
6567e41944f9a221d90c6725859c5be2bee6de8548c511a44faef27e1f216d87

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36
accept-language
en-CA,en;q=0.9

Response headers

Connection
keep-alive
Content-Encoding
gzip
Content-Type
text/html
Date
Fri, 26 Aug 2022 09:40:06 GMT
ETag
W/"62f633c4-938f"
Last-Modified
Fri, 12 Aug 2022 11:04:36 GMT
Server
nginx/1.10.3 (Ubuntu)
Transfer-Encoding
chunked
common-vendor.b8ecfc406ac0b5f77a26.css
vitalik.ca/css/
34 KB
34 KB
Stylesheet
General
Full URL
https://vitalik.ca/css/common-vendor.b8ecfc406ac0b5f77a26.css
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
3631091229aed82f220f7dae9876984a19cf0ee14894c75329ffc293c28faecb

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 12 Aug 2022 11:04:42 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"62f633ca-8881"
Content-Type
text/css
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
34945
fretboard.f32f2a8d5293869f0195.css
vitalik.ca/css/
2 KB
3 KB
Stylesheet
General
Full URL
https://vitalik.ca/css/fretboard.f32f2a8d5293869f0195.css
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
ce08fa9a68109594e80a2e2bc464bff72d877d367e58488ce5739b399007241e

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 12 Aug 2022 11:04:42 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"62f633ca-963"
Content-Type
text/css
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
2403
pretty.0ae3265014f89d9850bf.css
vitalik.ca/css/
106 KB
106 KB
Stylesheet
General
Full URL
https://vitalik.ca/css/pretty.0ae3265014f89d9850bf.css
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
3c0b3cfa8573324fe89248dcf81a4ec50f49c9dc94a31a862c2e147470c2e695

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 12 Aug 2022 11:04:42 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"62f633ca-1a710"
Content-Type
text/css
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
108304
pretty-vendor.83ac49e057c3eac4fce3.css
vitalik.ca/css/
211 KB
212 KB
Stylesheet
General
Full URL
https://vitalik.ca/css/pretty-vendor.83ac49e057c3eac4fce3.css
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
6957b5f6d0aa8e1f04a4c477d963ffd8bd6388b6086fbf679ff4d4edf80d351b

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 12 Aug 2022 11:04:42 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"62f633ca-34d81"
Content-Type
text/css
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
216449
global.css
vitalik.ca/css/
5 KB
5 KB
Stylesheet
General
Full URL
https://vitalik.ca/css/global.css
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
8f5535c33e5cc9250e3baf0a99af695500a5e69cf9b6b2b48300103cc87fe1f9

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 12 Aug 2022 11:04:42 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"62f633ca-123b"
Content-Type
text/css
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
4667
misc.css
vitalik.ca/css/
1 KB
2 KB
Stylesheet
General
Full URL
https://vitalik.ca/css/misc.css
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
db3558aed49fe6b10a9444ec9b103e9aeb11f75d83c128d782ea85f2268a5dda

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 12 Aug 2022 11:04:42 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"62f633ca-579"
Content-Type
text/css
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
1401
tex-svg.js
vitalik.ca/scripts/
2 MB
2 MB
Script
General
Full URL
https://vitalik.ca/scripts/tex-svg.js
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
241840cc338ce7352f16ce707f7291e96d6e01c5c08bd69469a1c8c9f2fa9d54

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 12 Aug 2022 11:04:42 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"62f633ca-1a9edd"
Content-Type
application/javascript
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
1744605
Market1.png
vitalik.ca/images/qv-files/
21 KB
22 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/Market1.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
fc2f03b57fb03f64fd102cdabde67ec854baa45b36bd3e308c5c563d356b4a58

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-5525"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
21797
Market8.png
vitalik.ca/images/qv-files/
11 KB
11 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/Market8.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
65a796d182b115f4a50c01bba97a45e12817adfb9b155361cfb9ea7bac8e4c38

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-2ba2"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
11170
Market9.png
vitalik.ca/images/qv-files/
10 KB
10 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/Market9.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
596c5cf2cbb00eabaf2c125d9517ad2cb5a93f75b084b57599dbda6af93fca8d

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-2778"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
10104
Market10.png
vitalik.ca/images/qv-files/
10 KB
10 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/Market10.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
74ee7f6bd40c362641fdb4e31a28af139f64e2ca517d88a4651636c8c31497c2

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-27cd"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
10189
qv_triangle.png
vitalik.ca/images/qv-files/
15 KB
15 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/qv_triangle.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
ea391ecae06d0d138b86da8bf28643c6d83c7630c28357ace595727d91060096

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:06 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-3c72"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
15474
Market7.png
vitalik.ca/images/qv-files/
30 KB
30 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/Market7.png?2e
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
927c2384791330a1b361fd8fe638aefc66f76ef240a82d71d5ad02900431df8f

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-773c"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
30524
tug_of_war.png
vitalik.ca/images/qv-files/
61 KB
62 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/tug_of_war.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
e5d9bc1f24124cff9bc54cf2f457a7eae7172115c5b1f43728a42a7a43e37c79

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-f50a"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
62730
quadratic_funding.png
vitalik.ca/images/qv-files/
8 KB
8 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/quadratic_funding.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
62d3a9e523616d801b3f0f0385dbd64e15f5faef433221f2c745d0caba9518e1

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-1e07"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
7687
round3.png
vitalik.ca/images/qv-files/
161 KB
161 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/round3.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
163c9eb0163fc82257fa9163a1976f75fe443e1f15e510a98e0d539810b974f8

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Sun, 29 Aug 2021 03:24:02 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612afdd2-282b4"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
164532
ads1.jpg
vitalik.ca/images/qv-files/
398 KB
398 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/ads1.jpg
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
8643a7f41f46ad30e46cd9e29e7a2906a370404c422ff3d12757cfe5602472d9

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-63682"
Content-Type
image/jpeg
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
407170
ads2.jpg
vitalik.ca/images/qv-files/
212 KB
212 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/ads2.jpg
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
417ef8c3092ba0a9e9a189991a424722b114a763d1daffbbd6eddd6457a88fc9

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Sun, 29 Aug 2021 02:35:29 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612af271-34f9f"
Content-Type
image/jpeg
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
216991
ads3.jpg
vitalik.ca/images/qv-files/
207 KB
207 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/ads3.jpg
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
74f1b7214c2707fd7cc8d7182058bc13c8bc053ac6157e42aa0ff9a229008a05

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-33c8b"
Content-Type
image/jpeg
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
212107
ads4.jpg
vitalik.ca/images/qv-files/
78 KB
78 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/ads4.jpg
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
ab3adf091c34eb34a629a1d043ff8c89f8c1ff7fc9bea23797d5da6aa59ec29e

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Sun, 29 Aug 2021 03:14:02 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612afb7a-138d0"
Content-Type
image/jpeg
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
80080
ads5.jpg
vitalik.ca/images/qv-files/
137 KB
138 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/ads5.jpg
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
3fa4da39cbd222629874d6190e91e463f722b16c92d7c3f77f72438756c91ec5

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Sun, 29 Aug 2021 03:10:53 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612afabd-225a7"
Content-Type
image/jpeg
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
140711
Oprah.png
vitalik.ca/images/qv-files/
384 KB
384 KB
Image
General
Full URL
https://vitalik.ca/images/qv-files/Oprah.png
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/general/2019/12/07/quadratic.html
Protocol
HTTP/1.1
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
66.172.12.251 Philadelphia, United States, ASN4213 (VPLS-GLOBAL, US),
Reverse DNS
ip-66-172-12-251.chunkhost.com
Software
nginx/1.10.3 (Ubuntu) /
Resource Hash
84e5b565d6dc83481f6fa5c5dd2e551a07333f236263009d53212e2cc0ef4cc7

Request headers

accept-language
en-CA,en;q=0.9
Referer
https://vitalik.ca/general/2019/12/07/quadratic.html
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

Date
Fri, 26 Aug 2022 09:40:07 GMT
Last-Modified
Fri, 27 Aug 2021 04:06:57 GMT
Server
nginx/1.10.3 (Ubuntu)
ETag
"612864e1-5ffdc"
Content-Type
image/png
Connection
keep-alive
Accept-Ranges
bytes
Content-Length
393180
MathJax_Main-Regular.woff
assets.hackmd.io/build/MathJax/fonts/HTML-CSS/TeX/woff/
33 KB
37 KB
Font
General
Full URL
https://assets.hackmd.io/build/MathJax/fonts/HTML-CSS/TeX/woff/MathJax_Main-Regular.woff
Requested by
Host: vitalik.ca
URL: https://vitalik.ca/css/misc.css
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2600:9000:202c:c200:1e:b99d:d4c0:93a1 , United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software
CloudFront / Express
Resource Hash
55c77dfef369aee9bf4058c15f01b7d8c245177cd0e2a6ecb1d1ae71a7443d6f
Security Headers
Name Value
Content-Security-Policy script-src 'self' vimeo.com https://gist.github.com www.slideshare.net 'unsafe-eval' https://assets.hackmd.io https://www.google.com https://apis.google.com https://docs.google.com https://www.dropbox.com https://*.disqus.com https://*.disquscdn.com https://www.google-analytics.com https://stats.g.doubleclick.net https://secure.quantserve.com https://rules.quantcount.com https://pixel.quantserve.com https://static.hotjar.com https://script.hotjar.com https://www.googletagmanager.com https://cdn.ravenjs.com https://browser.sentry-cdn.com https://js.stripe.com 'nonce-653b92a6-8153-4f20-836b-3b8cc9575998' 'sha256-EtvSSxRwce5cLeFBZbvZvDrTiRoyoXbWWwvEVciM5Ag=' 'sha256-NZb7w9GYJNUrMEidK01d3/DEtYztrtnXC/dQw7agdY4=' 'sha256-L0TsyAQLAc0koby5DCbFAwFfRs9ZxesA+4xg0QDSrdI=' 'sha256-8HvL1KRq6jEwDkuVgxMDK7Gag1vnT70L0Lfoa1E3YsY=' 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM='; img-src * data:; style-src 'self' 'unsafe-inline' https://assets-cdn.github.com https://github.githubassets.com https://assets.hackmd.io https://www.google.com https://fonts.gstatic.com https://*.disquscdn.com; font-src 'self' data: https://public.slidesharecdn.com https://assets.hackmd.io https://*.disquscdn.com https://script.hotjar.com; object-src *; media-src *; frame-src *; child-src *; connect-src *; base-uri 'none'; form-action 'self' https://www.paypal.com; upgrade-insecure-requests
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Security-Policy script-src 'self' vimeo.com https://gist.github.com www.slideshare.net 'unsafe-eval' https://assets.hackmd.io https://www.google.com https://apis.google.com https://docs.google.com https://www.dropbox.com https://*.disqus.com https://*.disquscdn.com https://www.google-analytics.com https://stats.g.doubleclick.net https://secure.quantserve.com https://rules.quantcount.com https://pixel.quantserve.com https://static.hotjar.com https://script.hotjar.com https://www.googletagmanager.com https://cdn.ravenjs.com https://browser.sentry-cdn.com https://js.stripe.com 'nonce-653b92a6-8153-4f20-836b-3b8cc9575998' 'sha256-EtvSSxRwce5cLeFBZbvZvDrTiRoyoXbWWwvEVciM5Ag=' 'sha256-NZb7w9GYJNUrMEidK01d3/DEtYztrtnXC/dQw7agdY4=' 'sha256-L0TsyAQLAc0koby5DCbFAwFfRs9ZxesA+4xg0QDSrdI=' 'sha256-8HvL1KRq6jEwDkuVgxMDK7Gag1vnT70L0Lfoa1E3YsY=' 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM='; img-src * data:; style-src 'self' 'unsafe-inline' https://assets-cdn.github.com https://github.githubassets.com https://assets.hackmd.io https://www.google.com https://fonts.gstatic.com https://*.disquscdn.com; font-src 'self' data: https://public.slidesharecdn.com https://assets.hackmd.io https://*.disquscdn.com https://script.hotjar.com; object-src *; media-src *; frame-src *; child-src *; connect-src *; base-uri 'none'; form-action 'self' https://www.paypal.com; upgrade-insecure-requests
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block

Request headers

Referer
https://vitalik.ca/
Origin
https://vitalik.ca
accept-language
en-CA,en;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.101 Safari/537.36

Response headers

date
Wed, 10 Aug 2022 06:22:31 GMT
via
1.1 7b6b24479d403ba8e499b225c726a688.cloudfront.net (CloudFront)
age
1394256
x-powered-by
Express
x-cache
Hit from cloudfront
content-length
34164
x-xss-protection
1; mode=block
referrer-policy
same-origin
last-modified
Tue, 02 Aug 2022 10:44:31 GMT
server
CloudFront
x-frame-options
SAMEORIGIN
etag
W/"8574-1825e283a98"
strict-transport-security
max-age=31536000; includeSubDomains; preload
content-type
application/font-woff
access-control-allow-origin
*
cache-control
public, max-age=31536000
content-security-policy
script-src 'self' vimeo.com https://gist.github.com www.slideshare.net 'unsafe-eval' https://assets.hackmd.io https://www.google.com https://apis.google.com https://docs.google.com https://www.dropbox.com https://*.disqus.com https://*.disquscdn.com https://www.google-analytics.com https://stats.g.doubleclick.net https://secure.quantserve.com https://rules.quantcount.com https://pixel.quantserve.com https://static.hotjar.com https://script.hotjar.com https://www.googletagmanager.com https://cdn.ravenjs.com https://browser.sentry-cdn.com https://js.stripe.com 'nonce-653b92a6-8153-4f20-836b-3b8cc9575998' 'sha256-EtvSSxRwce5cLeFBZbvZvDrTiRoyoXbWWwvEVciM5Ag=' 'sha256-NZb7w9GYJNUrMEidK01d3/DEtYztrtnXC/dQw7agdY4=' 'sha256-L0TsyAQLAc0koby5DCbFAwFfRs9ZxesA+4xg0QDSrdI=' 'sha256-8HvL1KRq6jEwDkuVgxMDK7Gag1vnT70L0Lfoa1E3YsY=' 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM='; img-src * data:; style-src 'self' 'unsafe-inline' https://assets-cdn.github.com https://github.githubassets.com https://assets.hackmd.io https://www.google.com https://fonts.gstatic.com https://*.disquscdn.com; font-src 'self' data: https://public.slidesharecdn.com https://assets.hackmd.io https://*.disquscdn.com https://script.hotjar.com; object-src *; media-src *; frame-src *; child-src *; connect-src *; base-uri 'none'; form-action 'self' https://www.paypal.com; upgrade-insecure-requests
x-amz-cf-pop
EWR52-C2
accept-ranges
bytes
x-webkit-csp
script-src 'self' vimeo.com https://gist.github.com www.slideshare.net 'unsafe-eval' https://assets.hackmd.io https://www.google.com https://apis.google.com https://docs.google.com https://www.dropbox.com https://*.disqus.com https://*.disquscdn.com https://www.google-analytics.com https://stats.g.doubleclick.net https://secure.quantserve.com https://rules.quantcount.com https://pixel.quantserve.com https://static.hotjar.com https://script.hotjar.com https://www.googletagmanager.com https://cdn.ravenjs.com https://browser.sentry-cdn.com https://js.stripe.com 'nonce-653b92a6-8153-4f20-836b-3b8cc9575998' 'sha256-EtvSSxRwce5cLeFBZbvZvDrTiRoyoXbWWwvEVciM5Ag=' 'sha256-NZb7w9GYJNUrMEidK01d3/DEtYztrtnXC/dQw7agdY4=' 'sha256-L0TsyAQLAc0koby5DCbFAwFfRs9ZxesA+4xg0QDSrdI=' 'sha256-8HvL1KRq6jEwDkuVgxMDK7Gag1vnT70L0Lfoa1E3YsY=' 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM='; img-src * data:; style-src 'self' 'unsafe-inline' https://assets-cdn.github.com https://github.githubassets.com https://assets.hackmd.io https://www.google.com https://fonts.gstatic.com https://*.disquscdn.com; font-src 'self' data: https://public.slidesharecdn.com https://assets.hackmd.io https://*.disquscdn.com https://script.hotjar.com; object-src *; media-src *; frame-src *; child-src *; connect-src *; base-uri 'none'; form-action 'self' https://www.paypal.com; upgrade-insecure-requests
x-amz-cf-id
bH_Kr9HjI65GOoAt7jMuTPOt0RBt5C7jUOU4Yv1ZUIGNHS5SegYsQQ==
x-content-security-policy
script-src 'self' vimeo.com https://gist.github.com www.slideshare.net 'unsafe-eval' https://assets.hackmd.io https://www.google.com https://apis.google.com https://docs.google.com https://www.dropbox.com https://*.disqus.com https://*.disquscdn.com https://www.google-analytics.com https://stats.g.doubleclick.net https://secure.quantserve.com https://rules.quantcount.com https://pixel.quantserve.com https://static.hotjar.com https://script.hotjar.com https://www.googletagmanager.com https://cdn.ravenjs.com https://browser.sentry-cdn.com https://js.stripe.com 'nonce-653b92a6-8153-4f20-836b-3b8cc9575998' 'sha256-EtvSSxRwce5cLeFBZbvZvDrTiRoyoXbWWwvEVciM5Ag=' 'sha256-NZb7w9GYJNUrMEidK01d3/DEtYztrtnXC/dQw7agdY4=' 'sha256-L0TsyAQLAc0koby5DCbFAwFfRs9ZxesA+4xg0QDSrdI=' 'sha256-8HvL1KRq6jEwDkuVgxMDK7Gag1vnT70L0Lfoa1E3YsY=' 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM='; img-src * data:; style-src 'self' 'unsafe-inline' https://assets-cdn.github.com https://github.githubassets.com https://assets.hackmd.io https://www.google.com https://fonts.gstatic.com https://*.disquscdn.com; font-src 'self' data: https://public.slidesharecdn.com https://assets.hackmd.io https://*.disquscdn.com https://script.hotjar.com; object-src *; media-src *; frame-src *; child-src *; connect-src *; base-uri 'none'; form-action 'self' https://www.paypal.com; upgrade-insecure-requests

Verdicts & Comments Add Verdict or Comment

9 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.

object| oncontextlost object| oncontextrestored function| structuredClone object| launchQueue object| onbeforematch function| getScreenDetails function| queryLocalFonts object| navigation object| MathJax

0 Cookies

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.

assets.hackmd.io
vitalik.ca
2600:9000:202c:c200:1e:b99d:d4c0:93a1
66.172.12.251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8643a7f41f46ad30e46cd9e29e7a2906a370404c422ff3d12757cfe5602472d9
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ab3adf091c34eb34a629a1d043ff8c89f8c1ff7fc9bea23797d5da6aa59ec29e
ce08fa9a68109594e80a2e2bc464bff72d877d367e58488ce5739b399007241e
db3558aed49fe6b10a9444ec9b103e9aeb11f75d83c128d782ea85f2268a5dda
e5d9bc1f24124cff9bc54cf2f457a7eae7172115c5b1f43728a42a7a43e37c79
ea391ecae06d0d138b86da8bf28643c6d83c7630c28357ace595727d91060096
fc2f03b57fb03f64fd102cdabde67ec854baa45b36bd3e308c5c563d356b4a58