urlscan.io logo urlscan.io
SecurityTrails logo

wiki.nerdsgocasual.de Open in urlscan Pro
2a01:4f8:13b:1623::2  Public Scan

Go To Rescan Add Verdict Report
Submitted URL: http://wiki.nerdsgocasual.de/
Effective URL: https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Submission: On December 02 via api from US — Scanned from DE
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 1 IPs in 1 countries across 1 domains to perform 12 HTTP transactions. The main IP is 2a01:4f8:13b:1623::2, located in Germany and belongs to HETZNER-AS, DE. The main domain is wiki.nerdsgocasual.de.
TLS certificate: Issued by R3 on November 20th 2023. Valid for: 3 months.
This is the only time wiki.nerdsgocasual.de was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
2 14 2a01:4f8:13b:... 24940 (HETZNER-AS)
12 1
Apex Domain
Subdomains		 Transfer
14 nerdsgocasual.de
wiki.nerdsgocasual.de
394 KB
12 1
Domain Requested by
14 wiki.nerdsgocasual.de 2 redirects wiki.nerdsgocasual.de
12 1

This site contains links to these domains. Also see Links.

Domain
www.mediawiki.org
Subject Issuer Validity Valid
wiki.nerdsgocasual.de
R3		 2023-11-20 -
2024-02-18		 3 months crt.sh

This page contains 1 frames:

Primary Page: https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Frame ID: 001FA227CC71546DC2776B5E64F03278
Requests: 12 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

Nerds Go Wiki

Page URL History Show full URLs

  1. http://wiki.nerdsgocasual.de/ HTTP 301
    https://wiki.nerdsgocasual.de/ HTTP 301
    https://wiki.nerdsgocasual.de/index.php?title=Hauptseite Page URL

Detected technologies

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

Page Statistics

12
Requests

100 %
HTTPS

100 %
IPv6

1
Domains

1
Subdomains

1
IPs

1
Countries

394 kB
Transfer

699 kB
Size

0
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. http://wiki.nerdsgocasual.de/ HTTP 301
    https://wiki.nerdsgocasual.de/ HTTP 301
    https://wiki.nerdsgocasual.de/index.php?title=Hauptseite Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

12 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
Primary Request index.php
wiki.nerdsgocasual.de/
Redirect Chain
  • http://wiki.nerdsgocasual.de/
  • https://wiki.nerdsgocasual.de/
  • https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
18 KB
6 KB 		Document
General
Check archive.org
Download Go to
Full URL
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PHP/8.0.30 PleskLin
Resource Hash
f861ffd3fd30cf3326caa065a34fa6d963498ae61bf18279302436d2686fbea5
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains
X-Content-Type-Options nosniff

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36
accept-language
de-DE,de;q=0.9

Response headers

cache-control
private, must-revalidate, max-age=0
content-encoding
gzip
content-language
de
content-length
5416
content-type
text/html; charset=UTF-8
date
Sat, 02 Dec 2023 14:30:52 GMT
expires
Sat, 02 Dec 2023 14:30:52 GMT
last-modified
Sun, 03 Sep 2023 07:36:57 GMT
server
nginx
strict-transport-security
max-age=15768000; includeSubDomains
vary
Accept-Encoding,Cookie
x-content-type-options
nosniff
x-powered-by
PHP/8.0.30 PleskLin
x-request-id
3206183dd326340047d9eb6e

Redirect headers

cache-control
private, must-revalidate, max-age=0
content-length
0
content-type
text/html; charset=utf-8
date
Sat, 02 Dec 2023 14:30:52 GMT
expires
Sat, 02 Dec 2023 14:30:52 GMT
last-modified
Sat, 02 Dec 2023 14:30:52 GMT
location
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
server
nginx
strict-transport-security
max-age=15768000; includeSubDomains
vary
Accept-Encoding,Cookie
x-content-type-options
nosniff
x-powered-by
PHP/8.0.30 PleskLin
x-request-id
4afb66e23876f8d5950a1569
load.php
wiki.nerdsgocasual.de/ 		35 KB
8 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=ext.ApprovedRevs%7Cext.CookieWarning.styles%7Cskins.vector.styles.legacy&only=styles&skin=vector
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PHP/8.0.30, PleskLin
Resource Hash
62b7890c0e1c85b0f7df4c8efe3dd826031f3645fbcc8de24cd0d32df52af0a0
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains
X-Content-Type-Options nosniff

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
content-encoding
gzip
x-content-type-options
nosniff
strict-transport-security
max-age=15768000; includeSubDomains
server
nginx
x-powered-by
PHP/8.0.30, PleskLin
etag
W/"1ieva-gzip"
vary
Accept-Encoding
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
public, max-age=300, s-maxage=300
link
<../images/logo_darkmode.png>;rel=preload;as=image
content-length
8048
x-request-id
3775cef31fc7ba5496fe7699
expires
Sat, 02 Dec 2023 14:35:52 GMT
load.php
wiki.nerdsgocasual.de/ 		35 KB
11 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=startup&only=scripts&raw=1&skin=vector
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PHP/8.0.30, PleskLin
Resource Hash
f31e02240bbf9ebd26f1f8ef2d9f474efb0418de4f9ec06f90daf823e26215da
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains
X-Content-Type-Options nosniff

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
x-content-type-options
nosniff
content-encoding
br
server
nginx
x-powered-by
PHP/8.0.30, PleskLin
etag
W/"10y8s"
content-type
text/javascript; charset=utf-8
cache-control
public, max-age=300, s-maxage=300
x-request-id
1feb2e5486a81f0878c7144e
expires
Sat, 02 Dec 2023 14:35:52 GMT
load.php
wiki.nerdsgocasual.de/ 		48 KB
8 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PHP/8.0.30, PleskLin
Resource Hash
10cf603a1bdc8bbc28298003487d4b4b48f099e5cdd983fc491d8568a5ceca5d
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains
X-Content-Type-Options nosniff

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
content-encoding
gzip
x-content-type-options
nosniff
strict-transport-security
max-age=15768000; includeSubDomains
server
nginx
x-powered-by
PHP/8.0.30, PleskLin
etag
W/"172lk-gzip"
vary
Accept-Encoding
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
public, max-age=300, s-maxage=300
content-length
7870
x-request-id
5cb9a89070a699ff59ac8b2b
expires
Sat, 02 Dec 2023 14:35:52 GMT
style.css
wiki.nerdsgocasual.de/extensions/PageOwnership/resources/ 		2 KB
623 B 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://wiki.nerdsgocasual.de/extensions/PageOwnership/resources/style.css
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PleskLin
Resource Hash
b2c439915a16c3e1af08d8ebe3ae77986342c52861fe1a923da8feffaab5a851
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
content-encoding
br
last-modified
Sun, 03 Sep 2023 06:36:24 GMT
server
nginx
etag
W/"64f42968-6a2"
x-powered-by
PleskLin
content-type
text/css
logo_darkmode.png
wiki.nerdsgocasual.de/images/ 		8 KB
8 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://wiki.nerdsgocasual.de/images/logo_darkmode.png
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PleskLin
Resource Hash
8eed88c80b35e5ab5085efa64d5d74de9051039f16bec37243c4e5071dc9991e
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
last-modified
Fri, 05 Feb 2021 00:17:52 GMT
server
nginx
etag
"601c8eb0-1e90"
x-powered-by
PleskLin
content-type
image/png
accept-ranges
bytes
content-length
7824
background.jpg
wiki.nerdsgocasual.de/skins/Vector/images/ 		275 KB
276 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://wiki.nerdsgocasual.de/skins/Vector/images/background.jpg
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PleskLin
Resource Hash
7bab6a255f5264fa61f57b24117d7800b77e6d0038c67d67b44bb1e2ba4d5735
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
last-modified
Fri, 05 Feb 2021 00:17:52 GMT
server
nginx
etag
"601c8eb0-44c3f"
x-powered-by
PleskLin
content-type
image/jpeg
accept-ranges
bytes
content-length
281663
page-fade.png
wiki.nerdsgocasual.de/skins/Vector/images/ 		114 B
328 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://wiki.nerdsgocasual.de/skins/Vector/images/page-fade.png
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PleskLin
Resource Hash
28650edb648dc8b27c5324d70053b5d163ee467cae0ef0f8ea3d4d75c9696bbb
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
last-modified
Fri, 05 Feb 2021 00:17:52 GMT
server
nginx
x-accel-version
0.01
etag
"72-5ba8bc04a8219"
x-powered-by
PleskLin
content-type
image/png
accept-ranges
bytes
content-length
114
bullet-icon.png
wiki.nerdsgocasual.de/skins/Vector/images/ 		576 B
791 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://wiki.nerdsgocasual.de/skins/Vector/images/bullet-icon.png
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PleskLin
Resource Hash
5456255a1132b37cdc33bb23b5fc38fbc9e2bcffda31fdbb893b09f957a0ae0f
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
last-modified
Fri, 05 Feb 2021 00:17:52 GMT
server
nginx
x-accel-version
0.01
etag
"240-5ba8bc04a8219"
x-powered-by
PleskLin
content-type
image/png
accept-ranges
bytes
content-length
576
search-fade.png
wiki.nerdsgocasual.de/skins/Vector/images/ 		94 B
307 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://wiki.nerdsgocasual.de/skins/Vector/images/search-fade.png
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PleskLin
Resource Hash
fa86b811027fd5dc20c28c65551d994c8afa3b9430fd246c2f98a069736f272a
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
last-modified
Fri, 05 Feb 2021 00:17:52 GMT
server
nginx
x-accel-version
0.01
etag
"5e-5ba8bc04a8219"
x-powered-by
PleskLin
content-type
image/png
accept-ranges
bytes
content-length
94
search-ltr.svg
wiki.nerdsgocasual.de/skins/Vector/images/ 		231 B
449 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://wiki.nerdsgocasual.de/skins/Vector/images/search-ltr.svg
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PleskLin
Resource Hash
ece8cf842660d97befec6bd0f93d0be08a21a4a980e3da33b875990997725352
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=site.styles&only=styles&skin=vector
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
last-modified
Fri, 05 Feb 2021 00:17:52 GMT
server
nginx
x-accel-version
0.01
etag
"e7-5ba8bc04a8219"
x-powered-by
PleskLin
content-type
image/svg+xml
accept-ranges
bytes
content-length
231
load.php
wiki.nerdsgocasual.de/ 		277 KB
75 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://wiki.nerdsgocasual.de/load.php?lang=de&modules=ext.CookieWarning%7Cjquery%2Csite%7Cjquery.client%2Ccookie%7Cmediawiki.String%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2CjqueryMsg%2Clanguage%2Cuser%2Cutil%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%2Cstartup%7Cskins.vector.legacy.js%7Cuser.defaults&skin=vector&version=1rdfj
Requested by
Host: wiki.nerdsgocasual.de
URL: https://wiki.nerdsgocasual.de/load.php?lang=de&modules=startup&only=scripts&raw=1&skin=vector
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
2a01:4f8:13b:1623::2 , Germany, ASN24940 (HETZNER-AS, DE),
Reverse DNS
Software
nginx / PHP/8.0.30, PleskLin
Resource Hash
3df0e250932b78e3da579add5f634bc7d7330f1d927d7fe0d4f800cf43af9594
Security Headers
Name Value
Strict-Transport-Security max-age=15768000; includeSubDomains
X-Content-Type-Options nosniff

Request headers

accept-language
de-DE,de;q=0.9
Referer
https://wiki.nerdsgocasual.de/index.php?title=Hauptseite
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.199 Safari/537.36

Response headers

date
Sat, 02 Dec 2023 14:30:52 GMT
strict-transport-security
max-age=15768000; includeSubDomains
x-content-type-options
nosniff
content-encoding
br
server
nginx
x-powered-by
PHP/8.0.30, PleskLin
etag
W/"1rdfj"
content-type
text/javascript; charset=utf-8
cache-control
public, max-age=2592000, s-maxage=2592000
x-request-id
dc98c870a0d10f5917840d4b
expires
Mon, 01 Jan 2024 14:30:52 GMT

Verdicts & Comments Add Verdict or Comment

13 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| documentPictureInPicture object| RLCONF object| RLSTATE object| RLPAGEMODULES object| RLQ function| isCompatible object| mediaWiki object| mw object| NORLQ function| $ function| jQuery function| $j function| pluralRuleParser

0 Cookies

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header Value
Strict-Transport-Security max-age=15768000; includeSubDomains
X-Content-Type-Options nosniff