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Servidores para multiples pruebas

https://realpython.com/python-sockets/

Obtener información del sistema operativo

cat /etc/os-release
lsb_release -a
hostnamectl

Ver Linux Kernel version:

uname -a
uname -r

Comandos de redes utiles

Ver estado actual de los socket

netstat -an

tcpdump --list-interfaces 
tcpdump -i eth0 -u port 9001
tcpdump -u port 9001

lsof -i -n

Abrir puertos tcp/udp

iptables -I INPUT -p tcp -m tcp --dport 5140 -j ACCEPT
iptables -I INPUT -p udp -m udp --dport 5140 -j ACCEPT

Validar puertos abiertos

netstat -tulpn | less
netstat -plnt

Snifear paquetes udp en un puerto

tcpdump udp -i any port 162

Configurar reloj usando ntpdate

Editar el crontab para q fuerce el actualizado del reloj. nano /etc/crontab */1 * * * * root ntpdate pool.ntp.org

Servidores disponibles

Envio de Logs remotos via sockets

En desarrollo

Instalar ngrok

mkdir /usr/share/ngrok
wget https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip
mv ngrok-stable-linux-amd64.zip /usr/share/ngrok
unzip /usr/share/ngrok/ngrok-stable-linux-amd64.zip

Ver si se instalo correctamente

./usr/share/ngrok/ngrok -h

Validar token

./usr/share/ngrok/ngrok autotoken <TOKEN>

Run ngrok

create a bash run-grok.sh file with ./usr/share/ngrok/ngrok http 8080 run in background nohup sh run-grok.sh

Lanzar ngrok

./usr/share/ngrok/ngrok http <PORT>

Obtener la dirección ngrok

curl http://localhost:4040/api/tunnels | json_reformat

Otros

Matar procesos por nombre.

pkill -f "multiprocess_monitor_firewall_ssh.py"

Configurar hora en un servidor

timedatectl status
timedatectl list-timezones
timedatectl set-timezone 'America/Lima'
  • Configurar servidor ntp yum install ntp

-Agregar ntp al arranque del sistema

chkconfig ntp on

-Iniciar servicio ntp

systemctl ntpd start 
systemctl ntpd status
  • Filtrar file logs usando grep
<log> | grep -v 'input.snmp'

Windows Server - PowerShell

Changing Execution Policy

Set-ExecutionPolicy Unrestricted
Get-ExecutionPolicy -List

Monitoring snmp of device

Instaling package to send request snmp in CentOS

yum install net-snmp-*

Commands

# Pretty visualization of json
head -1 data.json | jq

Generate SSL certifies using OpenSSL

Link with documentation:

Install OpenSSL in Centos
yum install openssl openssl-devel
Install OpenSSL in Centos
apt-get install openssl

Validate version of openssl

$ openssl --version

Generete certifies by mcaffe - tcp

https://kc.mcafee.com/corporate/index?page=content&id=KB87927&snspd-1116&locale=es_ES&viewlocale=es_ES

openssl req -newkey rsa:2048 -nodes -keyout /etc/owner_certifies/syslogselfsigned.key -x509 -days 365 -out /etc/owner_certifies/syslogselfsigned.crt -config /etc/pki/tls/openssl.cnf

Updating certifies using curl

Link: https://developers.facebook.com/docs/whatsapp/guides/https

curl -X POST \
  https://your-webapp-hostname:your-webapp-port/v1/certificates/external \
  -H 'Authorization: Bearer your-auth-token' \
  -H 'Content-Type: text/plain' \
  --data-binary @your-path-to-certificate.pem

For combine certifies use this command:

cat cert1.pem cert2.pem > bundle.pem

Uploading ...

curl -X POST \
  https://your-webapp-hostname:your-webapp-port/v1/certificates/webhooks/ca \
  -H 'Authorization: Bearer your-auth-token' \
  -H 'Cache-Control: no-cache' \
  -H 'Content-Type: text/plain' \
  --data-binary @your-path-to-certificate.pem \
  -k

Generar file .pem form .cert and .key

cat server.crt server.key > server.pem

Plugins VSCode

Encryptor

@author: Rush Frisby @version: 2237 @algorithm: AES 256.

Commands added:

encryptfile - encrypts the entire text in the current document

encryptstr - encrypts only the text that is selected in the current document

decryptfile - decrypts the entire text in the current document

decryptstr - decrypts only the text that is selected in the current document

- indent-rainbow
- show-offset
- Docker

Add or change password for root

In root type this commands:

sudo passwd root

CMD in Windows

Show user SID

> whoami /user

> netstat -ano

Python3

Install pip3

sudo apt install python3-pip

Validate correct instalation with:

sudo pip3 -version

Save dependences in a file

pip3 freeze > frozen-requirements.txt

Install requirements

pip3 install -r requirements.txt

Upgrade setuptools and pip

pip3 install --upgrade setuptools
pip3 install --upgrade pip

Flask

Configurate service

$export FLASK_APP=hello.py
$export FLASK_ENV=development
$flask run

HTML Server

En Mac y Linux

python -m SimpleHTTPServer 8000

Windows

python -m http.serverj 8000

More Documentation

FIN