Submitted URL: https://www.posta.ceskykrumlov.cz/
Effective URL: https://webmail.web4u.cz/
Submission: On August 30 via automatic, source certstream-suspicious — Scanned from DE

Summary

This website contacted 2 IPs in 1 countries across 2 domains to perform 17 HTTP transactions. The main IP is 2001:1568::29, located in Czech Republic and belongs to WEB4U, CZ. The main domain is webmail.web4u.cz.
TLS certificate: Issued by R10 on August 23rd 2024. Valid for: 3 months.
This is the only time webmail.web4u.cz was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
2 81.91.86.10 39790 (WEB4U)
1 16 2001:1568::29 39790 (WEB4U)
17 2
Apex Domain
Subdomains
Transfer
16 web4u.cz
webmail.web4u.cz
332 KB
2 ceskykrumlov.cz
www.posta.ceskykrumlov.cz
2 KB
17 2
Domain Requested by
16 webmail.web4u.cz 1 redirects webmail.web4u.cz
2 www.posta.ceskykrumlov.cz
17 2

This site contains no links.

Subject Issuer Validity Valid
posta.ceskykrumlov.cz
R11
2024-08-28 -
2024-11-26
3 months crt.sh
webmail.web4u.cz
R10
2024-08-23 -
2024-11-21
3 months crt.sh

This page contains 1 frames:

Primary Page: https://webmail.web4u.cz/
Frame ID: 199B4964367AAE1E169A9F79E95E09D4
Requests: 17 HTTP requests in this frame

Screenshot

Page Title

Webmail :: Vítejte v Webmail

Page URL History Show full URLs

  1. https://www.posta.ceskykrumlov.cz/ Page URL
  2. http://webmail.web4u.cz/horde/imp/login.php HTTP 307
    https://webmail.web4u.cz/horde/imp/login.php HTTP 301
    https://webmail.web4u.cz/ Page URL

Detected technologies

Overall confidence: 100%
Detected patterns
  • <link[^>]* href=[^>]*?bootstrap(?:[^>]*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)[^>]*?(?:\.min)?\.css
  • bootstrap(?:[^>]*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)[^>]*?(?:\.min)?\.js

Overall confidence: 100%
Detected patterns
  • jquery.*\.js(?:\?ver(?:sion)?=([\d.]+))?

Overall confidence: 100%
Detected patterns
  • jquery-ui.*\.js

Page Statistics

17
Requests

100 %
HTTPS

50 %
IPv6

2
Domains

2
Subdomains

2
IPs

1
Countries

334 kB
Transfer

1086 kB
Size

1
Cookies

Page URL History

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

  1. https://www.posta.ceskykrumlov.cz/ Page URL
  2. http://webmail.web4u.cz/horde/imp/login.php HTTP 307
    https://webmail.web4u.cz/horde/imp/login.php HTTP 301
    https://webmail.web4u.cz/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

17 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
/
www.posta.ceskykrumlov.cz/
309 B
388 B
Document
General
Full URL
https://www.posta.ceskykrumlov.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
81.91.86.10 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
php4.web4u.cz
Software
openresty /
Resource Hash
be42efa6fa80b2bd5689b6c09b5a81637ebfee58b84e225b061658d856ff613e

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

content-encoding
gzip
content-type
text/html
date
Fri, 30 Aug 2024 22:09:17 GMT
etag
W/"18c2943-135-429202ec1fcc0"
last-modified
Sat, 10 Feb 2007 14:35:07 GMT
server
openresty
x-w4u-upstream
http://data27_php4
Primary Request /
webmail.web4u.cz/
Redirect Chain
  • http://webmail.web4u.cz/horde/imp/login.php
  • https://webmail.web4u.cz/horde/imp/login.php
  • https://webmail.web4u.cz/
5 KB
3 KB
Document
General
Full URL
https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
c395939930e97c18bd1ee561dbc8b97fd05e19394547d546dd1f90665940197e
Security Headers
Name Value
X-Frame-Options sameorigin

Request headers

Referer
https://www.posta.ceskykrumlov.cz/
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

cache-control
private, no-cache, no-store, must-revalidate, post-check=0, pre-check=0
content-encoding
gzip
content-language
cs
content-type
text/html; charset=UTF-8
date
Fri, 30 Aug 2024 22:09:17 GMT
expires
Fri, 30 Aug 2024 22:09:17 GMT
last-modified
Fri, 30 Aug 2024 22:09:17 GMT
pragma
no-cache
server
openresty
vary
Accept-Encoding
x-frame-options
sameorigin

Redirect headers

content-length
315
content-type
text/html; charset=iso-8859-1
date
Fri, 30 Aug 2024 22:09:17 GMT
location
https://webmail.web4u.cz
server
openresty
favicon.ico
www.posta.ceskykrumlov.cz/
2 KB
2 KB
Other
General
Full URL
https://www.posta.ceskykrumlov.cz/favicon.ico
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
81.91.86.10 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
php4.web4u.cz
Software
openresty /
Resource Hash

Request headers

Referer
https://www.posta.ceskykrumlov.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

content-language
de
date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
server
openresty
vary
accept-language,accept-charset
content-type
text/html; charset=iso-8859-1
bootstrap.min.css
webmail.web4u.cz/skins/elastic/deps/
157 KB
24 KB
Stylesheet
General
Full URL
https://webmail.web4u.cz/skins/elastic/deps/bootstrap.min.css?s=1722763441
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
3cb5b7ae5053d743996378c35733560214d3d896ade5c0de0d8b13a97f43039e

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:24:01 GMT
server
openresty
etag
"2725b-61ed81eeece40-gzip"
vary
Accept-Encoding
content-type
text/css
accept-ranges
bytes
content-length
23877
styles.min.css
webmail.web4u.cz/skins/elastic/styles/
117 KB
22 KB
Stylesheet
General
Full URL
https://webmail.web4u.cz/skins/elastic/styles/styles.min.css?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
31df675dd62d43348dfd9b4cf6e00c650496da51749b126eea051d195879c3f3

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"1d320-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
text/css
accept-ranges
bytes
content-length
22204
jquery-ui.min.css
webmail.web4u.cz/plugins/jqueryui/themes/elastic/
29 KB
7 KB
Stylesheet
General
Full URL
https://webmail.web4u.cz/plugins/jqueryui/themes/elastic/jquery-ui.min.css?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
b3805c77dc478fd0e6a66140c13cc9ab7d26832c136f48aa418490035d7cb095

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"72ff-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
text/css
accept-ranges
bytes
content-length
7419
jquery.min.js
webmail.web4u.cz/program/js/
89 KB
31 KB
Script
General
Full URL
https://webmail.web4u.cz/program/js/jquery.min.js?s=1722763439
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
5641ed21773230a8110279658abac57bb5b4abc7bf4091946c5e61e8f0021f55

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:59 GMT
server
openresty
etag
"1632e-61ed81ed049c0-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
content-length
31705
common.min.js
webmail.web4u.cz/program/js/
12 KB
5 KB
Script
General
Full URL
https://webmail.web4u.cz/program/js/common.min.js?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
08bf7a712ce3944d218f618ee6fa4131bd97bcc1891d1f9b7bd2ba116baf27fa

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"31f5-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
content-length
4855
app.min.js
webmail.web4u.cz/program/js/
170 KB
48 KB
Script
General
Full URL
https://webmail.web4u.cz/program/js/app.min.js?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
4dcff48fc4abbddf5479b617713c157e0f03860a19f4e3dc42264c079b9781bf

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"2a83d-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
content-length
48676
jstz.min.js
webmail.web4u.cz/program/js/
14 KB
5 KB
Script
General
Full URL
https://webmail.web4u.cz/program/js/jstz.min.js?s=1722763439
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
716ece8deb8412f7ec95ab395c92f6515bb8d8b792fd7480c014cdc6f063452a

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:59 GMT
server
openresty
etag
"360b-61ed81ed049c0-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
content-length
5013
jquery-ui.min.js
webmail.web4u.cz/plugins/jqueryui/js/
254 KB
68 KB
Script
General
Full URL
https://webmail.web4u.cz/plugins/jqueryui/js/jquery-ui.min.js?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
59a4c9a75c48cf979e66c5641230bda0e15dfff292666e56ffb52a5a96d78834

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"3f6c0-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
jquery.ui.datepicker-cs.js
webmail.web4u.cz/plugins/jqueryui/js/i18n/
1 KB
811 B
Script
General
Full URL
https://webmail.web4u.cz/plugins/jqueryui/js/i18n/jquery.ui.datepicker-cs.js?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
b0c2b58c649d61b1b8244a9fcc1a7e531abb68d0398884d977818ac8a2af68d0

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"413-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
content-length
617
logo.svg
webmail.web4u.cz/skins/elastic/images/
5 KB
2 KB
Image
General
Full URL
https://webmail.web4u.cz/skins/elastic/images/logo.svg?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
61f0e6c99b7183b82a6b117836bd2bf9969d85d3a53eb625ee12f261ffa27940

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Thu, 26 Apr 2018 09:31:47 GMT
server
openresty
etag
"143a-56abd0e6de6c0-gzip"
vary
Accept-Encoding
content-type
image/svg+xml
accept-ranges
bytes
content-length
1871
bootstrap.bundle.min.js
webmail.web4u.cz/skins/elastic/deps/
82 KB
21 KB
Script
General
Full URL
https://webmail.web4u.cz/skins/elastic/deps/bootstrap.bundle.min.js?s=1722763441
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
19b51730c10082760e6d9b82c1342e60855f98d2666c64e4eb758d26b1a0c840

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:24:01 GMT
server
openresty
etag
"14888-61ed81eeece40-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
content-length
21767
ui.min.js
webmail.web4u.cz/skins/elastic/
59 KB
19 KB
Script
General
Full URL
https://webmail.web4u.cz/skins/elastic/ui.min.js?s=1722763434
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
5a6a4d9f6477096170f94cd9a9ed3047c840b537a55a7942f3aed2a34dbbe426

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:17 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"ed2b-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
application/javascript
accept-ranges
bytes
content-length
19424
fa-solid-900.woff2
webmail.web4u.cz/skins/elastic/fonts/
74 KB
74 KB
Font
General
Full URL
https://webmail.web4u.cz/skins/elastic/fonts/fa-solid-900.woff2
Requested by
Host: webmail.web4u.cz
URL: https://webmail.web4u.cz/skins/elastic/styles/styles.min.css?s=1722763434
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
cd398be1a91817126cef10224738e624358edf6f08043abad7e60c1aaeccc8d0

Request headers

Referer
https://webmail.web4u.cz/skins/elastic/styles/styles.min.css?s=1722763434
Origin
https://webmail.web4u.cz
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:18 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"126b0-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
font/woff2
accept-ranges
bytes
favicon.ico
webmail.web4u.cz/skins/elastic/images/
17 KB
2 KB
Other
General
Full URL
https://webmail.web4u.cz/skins/elastic/images/favicon.ico?s=1722763434
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2001:1568::29 , Czech Republic, ASN39790 (WEB4U, CZ),
Reverse DNS
Software
openresty /
Resource Hash
7b30e499996ec4631848d3509d803d9311f5d71999212f2f4c1ca7af8f24eb69

Request headers

Referer
https://webmail.web4u.cz/
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Response headers

date
Fri, 30 Aug 2024 22:09:18 GMT
content-encoding
gzip
last-modified
Sun, 04 Aug 2024 09:23:54 GMT
server
openresty
etag
"423e-61ed81e83fe80-gzip"
vary
Accept-Encoding
content-type
image/vnd.microsoft.icon
accept-ranges
bytes
content-length
1693

Verdicts & Comments Add Verdict or Comment

26 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.

function| $ function| jQuery number| CONTROL_KEY number| SHIFT_KEY number| CONTROL_SHIFT_KEY function| roundcube_browser object| rcube_event function| rcube_event_engine function| rcube_check_email function| rcube_clone_object function| urlencode function| rcube_find_object function| rcube_mouse_is_over function| setCookie function| getCookie object| bw function| rcube_parse_query object| Base64 object| pattern function| rcube_webmail object| jstz object| rcmail object| bootstrap function| rcube_elastic_ui function| __newInst object| UI

1 Cookies

Domain/Path Name / Value
webmail.web4u.cz/ Name: roundcube_sessid
Value: n8gnaeddbn3n12vf261s44pje9

2 Console Messages

Source Level URL
Text
network error URL: https://www.posta.ceskykrumlov.cz/favicon.ico
Message:
Failed to load resource: the server responded with a status of 404 ()
recommendation verbose URL: https://webmail.web4u.cz/
Message:
[DOM] Input elements should have autocomplete attributes (suggested: "current-password"): (More info: https://goo.gl/9p2vKq) %o