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Monitorización en Linux
En el mundo de la ciberseguridad, es fundamental tener una buena monitorización de los sistemas y redes. Esto permite detectar posibles amenazas y actuar de forma preventiva, además de mejorar el rendimiento del sistema. Por eso, en este artículo hablaremos de la monitorización en Linux: herramientas, configuraciones y casos de éxito. La monitorización en Linux se refiere al proceso de recopilar…
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Means of transportation. @alternafilms @grantharder #pnw #seatosky #a7riii #gm2470 #bts #mindthelog #logwatch (at The Georgia Straight)
# pacman -S logwatch
# pacman -S logwatch resolving dependencies... :: There are 2 providers available for cron: :: Repository core 1) cronie :: Repository community 2) fcron Enter a number (default=1): looking for conflicting packages... Packages (3) cronie-1.5.1-1 run-parts-4.8.1-1 logwatch-7.4.3-3 Total Download Size: 0.43 MiB Total Installed Size: 2.38 MiB :: Proceed with installation? [Y/n] :: Retrieving packages... run-parts-4.8.1-1-x86_64 27.8 KiB 2.71M/s 00:00 [########################################] 100% cronie-1.5.1-1-x86_64 68.4 KiB 2.90M/s 00:00 [########################################] 100% logwatch-7.4.3-3-any 344.4 KiB 4.80M/s 00:00 [########################################] 100% (3/3) checking keys in keyring [########################################] 100% (3/3) checking package integrity [########################################] 100% (3/3) loading package files [########################################] 100% (3/3) checking for file conflicts [########################################] 100% (3/3) checking available disk space [########################################] 100% :: Processing package changes... (1/3) installing run-parts [########################################] 100% (2/3) installing cronie [########################################] 100% Optional dependencies for cronie pm-utils: defer anacron on battery power smtp-server: send job output via email [installed] smtp-forwarder: forward job output to email server [installed] (3/3) installing logwatch [########################################] 100% Optional dependencies for logwatch perl-date-manip: human readable dates :: Running post-transaction hooks... (1/1) Arming ConditionNeedsUpdate...
ログのチェック
sshdのエラーログ
Cockpitのlog監視画面で見ているとsshdから，
error: Received disconnect from 192.168.253.11 port 63377:2: disconnected by server request
というエラーログがでていた． こちらによるとTeraTermのバグらしいので，久々にアップデートしてみるとこのエラーはなくなる．
Auditの嫌がらせログ対策
logwatchのメールでAuditのログが大量に送られてきます．昔対処したはずだが，今回のFedora26へのアップデートでデフォルトに戻ってしまったようです．
を見ると，/etc/logwatch/conf/override.confというファイルを変更すれば良いことは分かるが，困ったことにサービス名ってなに？
へ～なるほど，/usr/share/logw…
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Cómo monitorizar los logs de tu servidor con Logwatch en CentOS o Ubuntu
Cómo monitorizar los logs de tu servidor con Logwatch en CentOS o Ubuntu #CentOS #Ubuntu #Linux
Logwatch es un programa que te va a mantener al tanto de todo lo que pase en tu servidor Linux analizando los logs del sistema y mandandote informes diarios a tu e-mail
En este tutorial vamos a ver como instalar Logwtach en Ubuntu y CentOS
Instalamos logwatch
CentOS
yum install logwatch -y
Ubuntu
sudo apt-get install logwatch
Si quieres recibir los informes por e-mail vas a necesitar tener…
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Fixed: Empty/Null Apache request entries in access log #dev #computers #fix
Fixed: Empty/Null Apache request entries in access log #dev #computers #fix
Empty/Null Apache request entries in access log
This entry got logged in a Apache access log:
IP ADDRESS – – [00/00/0000:00:00:00 -0000] ” ” 301 – “-” “-“
It was detected by LogWatch as a null HTTP Response and also got marked as a successful probe..
I am curious about how this request about made and how it is considered a successful probe. Here is what I can decipher with specific questions:
T…
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Answer: What does "Normal Shutdown, Thank you for playing preauth" In SSH logs mean? #fix #answer #programming
Answer: What does "Normal Shutdown, Thank you for playing preauth" In SSH logs mean? #fix #answer #programming
What does "Normal Shutdown, Thank you for playing [preauth]" In SSH logs mean?
Recently, My SSH log summaries for my Ubuntu 12.04 servers in Logwatch have started showing entries for “11: Normal Shutdown, Thank you for playing [preauth]” along with the “11: Bye Bye [preauth]” and “11: disconnected by user” messages they had been showing previously.
I have not seen this message in my logs before…
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How-to: Linux: logwatch(8) is too noisy. How can I control the noise level? #it #development #computers
How-to: Linux: logwatch(8) is too noisy. How can I control the noise level? #it #development #computers
Linux: logwatch(8) is too noisy. How can I control the noise level?
Our Linux systems run logwatch(8) utility by default. On a RedHat/CentOS/SL system, Logwatch is called by the /etc/cron.daily/ cronjob, which then sends a daily email with the results. These emails have a subject like:
Subject: Logwatch for $HOSTNAME
The problem is that by default these daily emails are too noisy and contain a…
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