<!--%PDF-yt-->AWSTATS DATA FILE 7.8 (build 20200416)
# If you remove this file, all statistics for date 202402 will be lost/reset.
# Last config file used to build this data file was /home/wwbtlc/tmp/awstats/awstats.ags.btlconsultants.com.mx.conf.

# Position (offset in bytes) in this file for beginning of each section for
# direct I/O access. If you made changes somewhere in this file, you should
# also remove completely the MAP section (AWStats will rewrite it at next
# update).
BEGIN_MAP 28
POS_GENERAL 2020                
POS_TIME 2698                
POS_VISITOR 8151                
POS_DAY 10615               
POS_DOMAIN 3253                
POS_LOGIN 3682                
POS_ROBOT 3837                
POS_WORMS 4204                
POS_EMAILSENDER 4335                
POS_EMAILRECEIVER 4478                
POS_SESSION 11219               
POS_SIDER 11399               
POS_FILETYPES 4613                
POS_DOWNLOADS 4803                
POS_OS 5093                
POS_BROWSER 5327                
POS_SCREENSIZE 6285                
POS_UNKNOWNREFERER 6359                
POS_UNKNOWNREFERERBROWSER 6731                
POS_ORIGIN 7098                
POS_SEREFERRALS 7234                
POS_PAGEREFS 7393                
POS_SEARCHWORDS 7541                
POS_KEYWORDS 7693                
POS_MISC 2362                
POS_ERRORS 7752                
POS_CLUSTER 3538                
POS_SIDER_404 7842                
END_MAP

# LastLine    = Date of last record processed - Last record line number in last log - Last record offset in last log - Last record signature value
# FirstTime   = Date of first visit for history file
# LastTime    = Date of last visit for history file
# LastUpdate  = Date of last update - Nb of parsed records - Nb of parsed old records - Nb of parsed new records - Nb of parsed corrupted - Nb of parsed dropped
# TotalVisits = Number of visits
# TotalUnique = Number of unique visitors
# MonthHostsKnown   = Number of hosts known
# MonthHostsUnKnown = Number of hosts unknown
BEGIN_GENERAL 8
LastLine 20240301061349 12 1959 15891487641180
FirstTime 20240201185358
LastTime 20240229192808
LastUpdate 20240301061615 12 0 11 0 0
TotalVisits 82                  
TotalUnique 64                  
MonthHostsKnown 0                   
MonthHostsUnknown 68                  
END_GENERAL

# Misc ID - Pages - Hits - Bandwidth
BEGIN_MISC 10
JavaEnabled 0 0 0
FlashSupport 0 0 0
JavascriptDisabled 0 0 0
AddToFavourites 0 6 0
TotalMisc 0 0 0
PDFSupport 0 0 0
QuickTimeSupport 0 0 0
WindowsMediaPlayerSupport 0 0 0
DirectorSupport 0 0 0
RealPlayerSupport 0 0 0
END_MISC

# Hour - Pages - Hits - Bandwidth - Not viewed Pages - Not viewed Hits - Not viewed Bandwidth
BEGIN_TIME 24
0 8 10 2071 0 2 0
1 7 7 594 1 2 299
2 2 2 305 0 0 0
3 2 2 590 0 0 0
4 6 6 297 0 2 0
5 0 0 0 0 0 0
6 4 4 594 1 1 0
7 44 44 2637 0 0 0
8 48 48 293 2 2 10366
9 59 64 0 10 10 31254
10 5 5 883 0 0 0
11 3 3 598 1 2 299
12 0 0 0 1 1 0
13 27 27 594 2 2 0
14 15 15 0 2 2 0
15 6 6 299 1 1 10368
16 0 2 0 28 28 0
17 5 5 885 4 5 31490
18 9 9 1744 0 0 0
19 9 9 295 0 0 0
20 1 2 0 0 0 0
21 6 6 299 0 2 0
22 13 14 295 5 6 31481
23 2 2 0 2 2 0
END_TIME

# Domain - Pages - Hits - Bandwidth
# The 25 first Pages must be first (order not required for others)
BEGIN_DOMAIN 21
ca 60 65 0
bg 57 58 6452
us 43 46 3861
gb 34 34 297
in 27 27 1477
eu 20 20 0
ru 12 14 0
cn 7 7 0
ua 4 4 1186
bn 3 3 0
lt 3 3 0
vn 2 2 0
jp 1 1 0
my 1 1 0
sa 1 1 0
sg 1 1 0
il 1 1 0
au 1 1 0
id 1 1 0
de 1 1 0
be 1 1 0
END_DOMAIN

# Cluster ID - Pages - Hits - Bandwidth
BEGIN_CLUSTER 0
END_CLUSTER

# Login - Pages - Hits - Bandwidth - Last visit
# The 10 first Pages must be first (order not required for others)
BEGIN_LOGIN 0
END_LOGIN

# Robot ID - Hits - Bandwidth - Last visit - Hits on robots.txt
# The 25 first Hits must be first (order not required for others)
BEGIN_ROBOT 7
Go\-http\-client/ 34 0 20240209164259 0
Googlebot/ 4 598 20240222115641 2
urllib 4 0 20240229140414 0
bot[\s_+:,\.\;\/\\-] 4 598 20240224012137 2
no_user_agent 3 0 20240223224400 0
curl 3 0 20240221235412 0
survey 1 0 20240228231859 0
END_ROBOT

# Worm ID - Hits - Bandwidth - Last visit
# The 5 first Hits must be first (order not required for others)
BEGIN_WORMS 0
END_WORMS

# EMail - Hits - Bandwidth - Last visit
# The 20 first Hits must be first (order not required for others)
BEGIN_EMAILSENDER 0
END_EMAILSENDER

# EMail - Hits - Bandwidth - Last visit
# The 20 first hits must be first (order not required for others)
BEGIN_EMAILRECEIVER 0
END_EMAILRECEIVER

# Files type - Hits - Bandwidth - Bandwidth without compression - Bandwidth after compression
BEGIN_FILETYPES 9
xml 32 0 0 0
json 2 0 0 0
alfa 2 0 0 0
css 1 0 0 0
html 94 3195 0 0
Unknown 8 0 0 0
txt 5 0 0 0
php 143 9783 0 0
js 5 295 0 0
END_FILETYPES

# Downloads - Hits - Bandwidth
BEGIN_DOWNLOADS 5
/assets/admin/bower_components/jquery.filer/php/readme.txt 1 0 0
/plugins/jquery.filer/php/readme.txt 1 0 0
/jquery.filer/php/readme.txt 1 0 0
/assets/plugins/jquery.filer/php/readme.txt 1 0 0
/assets/vendor/jquery.filer/php/readme.txt 1 0 0
END_DOWNLOADS

# OS ID - Hits
BEGIN_OS ID - Hits - Pages 12
ios_iphone 2 1
macosx15 11 11
android10 2 2
win8.1 10 10
macosx10 12 12
Unknown 4 4
linux 28 28
linuxubuntu 1 1
win7 3 3
macosx11 1 1
androidnougat 81 80
win10 137 128
END_OS

# Browser ID - Hits - Pages
BEGIN_BROWSER 44
msie11.0 1 1
Unknown 4 4
chrome74.0.3729.157 1 1
firefox72.0 1 1
chrome74.0.3729.169 2 2
chrome90.0.4430.93 2 2
firefox53.0.3 1 1
chrome96.0.4664.110 6 6
chrome93.0.4577.82 1 0
firefox79.0 7 7
chrome83.0.4103.61 2 2
safari14.0.1 1 1
chrome88.0.4240.193 40 40
chrome79.0.3945.130 2 2
chrome90.0.4430.85 2 2
chrome87.0.4280.67 2 2
chrome108.0.0.0 4 4
firefox66.0 1 1
chrome72.0.3626.121 2 2
safari14.1.2 1 0
chrome69.0.3497.100 2 2
firefox95.0 13 13
chrome91.0.4472.77 1 0
chrome109.0.0.0 6 6
firefox63.0 9 9
chrome118.0.0.0 1 1
chrome99.0.4859.172 61 56
chrome85.0.4183.102 1 0
chrome80.0.3987.132 1 1
firefox74.0 1 1
firefox68.0 1 1
chrome89.0.4389.90 1 1
chrome86.0.4240.110 1 1
mozilla 2 2
chrome79.0.3945.88 1 1
chrome86.0.4240.111 1 1
firefox76.0 1 1
chrome77.0.3865.90 1 1
firefox73.0 4 4
chrome39.0.2171.95 12 12
chrome92.0.4515.107 1 0
firefox77.0 2 2
opera70.0.3728.95 4 4
chrome60.0.3112.107 81 80
END_BROWSER

# Screen size - Hits
BEGIN_SCREENSIZE 0
END_SCREENSIZE

# Unknown referer OS - Last visit date
BEGIN_UNKNOWNREFERER 1
Expanse,_a_Palo_Alto_Networks_company,_searches_across_the_global_IPv4_space_multiple_times_per_day_to_identify_customers&#39;_presences_on_the_Internet._If_you_would_like_to_be_excluded_from_our_scans,_please_send_IP_addresses/domains_to:_scaninfo@paloaltonetworks.com 20240226221154
END_UNKNOWNREFERER

# Unknown referer Browser - Last visit date
BEGIN_UNKNOWNREFERERBROWSER 1
Expanse,_a_Palo_Alto_Networks_company,_searches_across_the_global_IPv4_space_multiple_times_per_day_to_identify_customers&#39;_presences_on_the_Internet._If_you_would_like_to_be_excluded_from_our_scans,_please_send_IP_addresses/domains_to:_scaninfo@paloaltonetworks.com 20240226221154
END_UNKNOWNREFERERBROWSER

# Origin - Pages - Hits 
BEGIN_ORIGIN 6
From0 245 255
From1 35 36
From2 1 1
From3 0 0
From4 0 0
From5 0 0
END_ORIGIN

# Search engine referers ID - Pages - Hits
BEGIN_SEREFERRALS 1
google_com 1 1
END_SEREFERRALS

# External page referers - Pages - Hits
# The 25 first Pages must be first (order not required for others)
BEGIN_PAGEREFS 0
END_PAGEREFS

# Search keyphrases - Number of search
# The 10 first number of search must be first (order not required for others)
BEGIN_SEARCHWORDS 0
END_SEARCHWORDS

# Search keywords - Number of search
# The 25 first number of search must be first (order not required for others)
BEGIN_KEYWORDS 0
END_KEYWORDS

# Errors - Hits - Bandwidth
BEGIN_ERRORS 1
403 11 114361
END_ERRORS

# URL with 404 errors - Hits - Last URL referrer
BEGIN_SIDER_404 0
END_SIDER_404

# Host - Pages - Hits - Bandwidth - Last visit date - [Start date of last visit] - [Last page of last visit]
# [Start date of last visit] and [Last page of last visit] are saved only if session is not finished
# The 25 first Hits must be first (order not required for others)
BEGIN_VISITOR 68
159.89.205.60 56 61 0 20240205090639
146.70.178.124 32 32 0 20240209095210
103.88.234.143 20 20 0 20240204074601
149.154.159.31 20 20 0 20240228134345
94.156.69.118 16 16 2039 20240217074146
159.69.61.178 12 12 0 20240208082253
91.92.253.89 11 11 889 20240228224111
94.156.68.85 11 11 0 20240228223520
87.121.87.254 11 12 2635 20240211181020
185.215.180.76 9 9 0 20240213141636
173.249.52.101 6 6 1774 20240225003056
45.138.16.99 6 6 1477 20240216132826
94.156.69.248 5 5 0 20240223071608
95.111.244.68 4 4 1186 20240222111919
103.230.69.159 3 3 0 20240229140413
89.116.56.160 3 3 0 20240229135504
173.249.29.208 3 3 889 20240227214218
173.249.52.120 2 2 594 20240224060746
36.99.136.129 2 2 0 20240214041458
173.249.52.122 2 2 604 20240228150344
91.92.253.88 2 2 594 20240223074237
38.242.195.48 2 2 0 20240214172521
23.239.22.194 2 2 0 20240205010330
113.161.72.135 1 1 0 20240225212834
91.92.244.50 1 1 295 20240229192808
198.71.240.39 0 1 0 
205.210.31.78 1 1 0 20240215212821
178.210.67.81 0 1 0 
134.122.33.193 1 1 0 20240203093109
85.159.210.208 1 1 297 20240212043058
216.24.219.108 1 1 0 20240228061815
185.66.90.243 1 1 0 20240215102452
182.50.151.61 1 1 0 20240216153450
168.149.112.143 1 1 0 20240226095118
92.204.139.118 1 1 0 20240216140138
78.24.217.247 1 1 0 20240220081756
134.209.243.86 1 1 0 20240223231715
203.183.110.151 1 1 0 20240202093657
34.170.19.142 1 1 0 20240204113711
205.210.31.18 1 1 0 20240202191524
125.212.218.5 1 1 0 20240227212520
111.7.96.162 1 1 0 20240222215142
34.86.239.201 1 1 0 20240203100320
36.99.136.128 1 1 0 20240207004009
184.82.183.82 1 1 0 20240225194119
139.59.156.99 1 1 0 20240217042914
42.190.33.69 1 1 0 20240225194120
64.4.160.14 1 1 0 20240218141611
2.57.121.121 1 1 0 20240219042133
205.210.31.110 1 1 0 20240221045359
139.155.172.226 1 1 0 20240202131753
185.184.155.76 0 1 0 
115.245.68.131 1 1 0 20240205140059
198.71.237.23 0 1 0 
148.72.121.128 1 1 0 20240220074135
205.210.31.146 1 1 0 20240226221154
36.99.136.137 1 1 0 20240214041530
39.103.225.8 1 1 0 20240216092257
64.226.98.123 1 1 0 20240210024647
57.128.161.18 1 1 0 20240203194242
185.218.0.146 1 1 0 20240225194122
178.80.171.224 1 1 0 20240225194127
165.22.177.223 1 1 0 20240212190052
136.144.42.67 1 1 0 20240225194126
34.64.218.102 1 1 0 20240214133341
68.178.134.210 1 2 0 20240204201812
185.141.119.49 1 1 0 20240222215204
180.252.62.180 1 1 0 20240228061817
END_VISITOR

# Date - Pages - Hits - Bandwidth - Visits
BEGIN_DAY 29
20240201 1 1 295 1
20240202 3 4 0 3
20240203 3 3 0 3
20240204 25 25 588 6
20240205 60 65 596 5
20240206 4 4 1184 3
20240207 7 7 1178 4
20240208 12 13 295 1
20240209 32 32 0 1
20240210 1 1 0 1
20240211 8 8 1449 1
20240212 2 2 297 2
20240213 9 9 0 1
20240214 5 5 0 4
20240215 2 3 0 2
20240216 10 10 2069 7
20240217 15 15 1449 2
20240218 1 1 0 1
20240219 1 1 0 1
20240220 2 2 0 2
20240221 1 1 0 1
20240222 4 4 598 3
20240223 8 10 594 3
20240224 2 2 594 1
20240225 8 8 594 7
20240226 2 2 0 2
20240227 6 7 299 3
20240228 40 40 899 8
20240229 7 7 295 3
END_DAY

# Session range - Number of visits
BEGIN_SESSION 4
0s-30s 72
15mn-30mn 1
30s-2mn 7
5mn-15mn 2
END_SESSION

# URL - Pages - Bandwidth - Entry - Exit
# The 25 first Pages must be first (order not required for others)
BEGIN_SIDER 182
/ 26 297 21 19
/wp-login.php 13 0 13 13
/wp-json/ 8 0 8 8
/about.php 7 1493 6 5
/simple.php 6 1784 6 0
/chosen.php 6 1776 0 6
/style.php 5 590 5 4
/owa/ 4 0 2 0
/wp-admin/css/ 3 0 2 3
/inputs.php 3 885 3 3
/input.php 3 883 2 2
/xmlrpc.php 2 0 0 0
/.well-known/ 2 1590 1 0
/news/wp-includes/wlwmanifest.xml 2 0 0 0
/website/wp-includes/wlwmanifest.xml 2 0 0 0
/web/wp-includes/wlwmanifest.xml 2 0 0 0
/site/wp-includes/wlwmanifest.xml 2 0 0 0
/wp-includes/ 2 0 1 0
/wp/wp-includes/wlwmanifest.xml 2 0 0 0
/wp-content/uploads/ 2 0 0 0
/wp2/wp-includes/wlwmanifest.xml 2 0 0 0
/2019/wp-includes/wlwmanifest.xml 2 0 0 0
/shop/wp-includes/wlwmanifest.xml 2 0 0 0
/.well-known/pki-validation/ 2 1308 0 0
/ecp/Current/exporttool/microsoft.exchange.ediscovery.exporttool.application/ 2 0 0 2
/wp-includes/about.php 1 0 0 0
/assets/plugins/filemanager/dialog.php 1 0 0 0
/js/jquery-file-upload/server/php/ 1 0 0 0
/assets/global/plugins/jquery-file-upload/server/php/ 1 0 0 0
/wp-content/about.php 1 0 0 0
/assets/lib/jquery-file-upload/server/php/ 1 0 0 0
/lol.php 1 0 0 0
/admin/filemanager/dialog.php 1 0 0 0
/blog 1 0 0 0
/ll.php 1 0 0 0
/old/wp-admin/install.php 1 0 0 0
/tinymce/plugins/filemanager/dialog.php 1 0 0 0
/kcfinder/upload.php 1 0 0 0
/demo 1 0 0 0
/new/ 1 0 0 0
/wp 1 0 0 0
/site/wp-admin/install.php 1 0 0 0
/media/mediamgr/other/jq_fileupload/server/php/ 1 0 0 0
/gecko.php 1 0 0 0
/tinymce/filemanager/dialog.php 1 0 0 0
/assets/libs/jquery-file-upload/server/php/ 1 0 0 0
/phpformbuilder/plugins/filemanager/dialog.php 1 0 0 0
/assets/jquery-file-upload/server/php/ 1 0 0 0
/cms/wp-admin/install.php 1 0 0 0
/images/about.php 1 0 0 0
/wp-admin/css/colors/blue/CasperExV1.php 1 0 0 0
/app/webroot/global/plugins/jquery-file-upload/server/php/ 1 0 0 0
/wordpress 1 0 0 0
/wp.php 1 0 0 0
/shell.php 1 0 0 0
/wp-content/ 1 0 0 0
/assets/js/kcfinder/upload.php 1 0 0 0
/wso112233.php 1 293 0 0
/coaster/jquery/gallery-upload/server/php/ 1 0 0 0
/wp-content/themes/about.php 1 0 0 0
/wp-content/plugins/woocommerce/includes/shortcodes/ 1 0 0 0
/ALFA_DATA/alfacgiapi/perl.alfa 1 0 0 0
/css/ 1 0 0 0
/plugins/kcfinder/upload.php 1 0 0 0
/.well-known/acme-challenge/license.php 1 295 0 1
/test/ 1 0 0 0
/xl2023.php 1 0 0 0
/cgi-bin/about.php 1 0 0 0
/repeater.php 1 0 0 0
/wp-content/lol.php 1 0 1 0
/assets/tinymce/plugins/filemanager/dialog.php 1 0 0 0
/smm.php 1 0 0 0
/js/tinymce4/plugins/filemanager/dialog.php 1 0 0 0
/wp-content/upgrade/ 1 0 0 0
/wp-admin/install.php 1 0 1 0
/wp-content/uploads/style.php 1 0 0 0
/small.php 1 0 0 0
/thumb.php 1 0 0 0
/debug/default/index 1 0 0 1
/images/ 1 0 0 0
/wp-admin/users.php 1 0 0 0
/wp-includes/auto_seo.php 1 0 0 0
/wordpress/ 1 0 1 0
/0z.php 1 0 0 0
/wp-content/uploads/about.php 1 0 0 0
/assets/admin/tinymce/plugins/filemanager/dialog.php 1 0 0 0
/resources/global/plugins/jquery-file-upload/server/php/ 1 0 0 0
/test/wp-admin/install.php 1 0 0 0
/backup/wp-admin/install.php 1 0 0 0
/.vscode/sftp.json 1 0 0 1
/wp/wp-admin/install.php 1 0 0 0
/rindex.php 1 297 0 0
/metronic/assets/global/plugins/jquery-file-upload/server/php/ 1 0 0 0
/log.php 1 0 0 0
/mini.php 1 0 0 0
/.well-known/acme-challenge/about.php 1 0 0 0
/wp-content/style.php 1 0 0 0
/wp-content/plugins/wordpress-seo/src/ 1 0 0 0
/temp/ 1 0 0 0
/lufix.php 1 0 0 0
/wp-content/ll.php 1 0 0 1
/fm.php 1 0 0 0
/backup/ 1 0 0 0
/wp-content/plugins/ 1 0 0 0
/users.php 1 0 0 0
/assets/plugins/kcfinder/upload.php 1 0 0 0
/js/kcfinder/upload.php 1 0 0 0
/user.php 1 0 0 0
/assets/vendor_admin/plugins/jquery-file-upload/server/php/ 1 0 0 0
/timthumb.php 1 0 0 0
/assets/plugins/jquery-file-upload/server/php/ 1 0 0 0
/.seo.php 1 293 0 1
/wp-admin/css/colors/blue/atomlib.php 1 0 1 0
/new/wp-admin/install.php 1 0 0 0
/coloradmin/assets/plugins/jquery-file-upload/server/php/ 1 0 0 0
/assets/elfinder/elfinder.html 1 0 0 0
/wp-includes/style.php 1 0 0 0
/sito/wp-includes/wlwmanifest.xml 2 0 0 2
/blog/wp-admin/install.php 1 0 0 0
/old/ 1 0 0 0
/lib/jquery-file-upload/server/php/ 1 0 0 0
/alfacgiapi/perl.alfa 1 0 0 0
/web/wp-admin/install.php 1 0 0 0
/public/javascript/jquery.upload/server/php/ 1 0 0 0
/wp-content/index.php 1 0 0 0
/themes.php 1 0 1 0
/sftp-config.json 1 0 1 0
/blog/ 1 0 0 0
/cms/wp-includes/wlwmanifest.xml 2 0 0 0
/wp-content/themes/astra/assets/js/minified/ 1 0 0 0
/shell20211028.php 1 0 0 0
/assets/kcfinder/upload.php 1 0 0 0
/test/wp-includes/wlwmanifest.xml 2 0 0 0
/scripts/filemanager/dialog.php 1 0 0 0
/assets/scripts/filemanager/dialog.php 1 0 0 0
/wp-admin/ 2 0 0 0
/wp-content/plugins/YoRx/sh.php 1 297 1 1
/admin.php 2 0 0 1
/2020/wp-includes/wlwmanifest.xml 2 0 0 0
/wp/ 1 0 0 0
/wp-content/plugins/core-plugin/include.php 1 0 1 1
/classwithtostring.php 1 0 0 0
/.well-known/acme-challenge/index.php 1 299 1 0
/wp-admin/style.php 1 0 0 1
/upload.php 1 0 0 0
/doc.php 1 0 0 0
/blog/wp-includes/wlwmanifest.xml 2 0 0 0
/wp-content/themes/ 1 0 0 0
/wp-content/plugins/index.php 1 0 0 0
/init.php 1 0 0 0
/wordpress/wp-includes/wlwmanifest.xml 2 0 0 0
/plugins/jquery-file-upload/server/php/ 1 0 0 0
/oldsite/wp-admin/install.php 1 0 0 1
/filemanager/filemanager/dialog.php 1 0 0 0
/.well-knownold/ 2 0 0 1
/plugins.php 1 0 0 0
/wp-includes/wlwmanifest.xml 2 0 0 0
/assets/backend/plugins/jquery-file-upload/server/php/ 1 0 0 0
/wp-blog.php 1 0 0 1
/_ignition/execute-solution 1 0 0 0
/assets/themes/metronic/global/jquery-file-upload/server/php/ 1 0 0 0
/cloud.php 1 0 0 0
/auto_seo.php 1 0 1 0
/assets/filemanager/dialog.php 1 0 0 0
/new 1 0 0 0
/wordpress/wp-admin/install.php 1 0 0 0
/wp-admin/auto_seo.php 1 0 0 0
/wp-admin/about.php 1 0 0 0
/asset/kcfinder/upload.php 1 0 0 0
/.git/config 1 0 0 0
/nf_tracking.php 2 598 2 2
/byp.php 1 0 0 0
/wp1/wp-includes/wlwmanifest.xml 2 0 0 0
/wp-content/plugins/about.php 1 0 0 0
/assets/color_admin/plugins/jquery-file-upload/server/php/ 1 0 0 0
/edit-comments.php 1 0 0 0
/assets/plugins/elfinder/elfinder.html 1 0 0 0
/wp-content/auto_seo.php 1 0 0 1
/assets/admin/js/tinymce/plugins/filemanager/dialog.php 1 0 0 0
/formcraft/file-upload/server/php/ 1 0 0 0
/filemanager/dialog.php 1 0 0 0
/1.php 1 0 0 0
END_SIDER