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Firewall Setup Script

This script is designed to set up a basic firewall configuration on a Linux system using iptables. It is intended to enhance security by allowing only specific types of network traffic while blocking others. The script performs the following tasks:

1. Environment Setup:
   • The script is written in Bash (#!/usr/bin/env bash), which specifies the interpreter to use.
   • The script sets two important options:
     • set -o nounset: This option ensures that using unset variables will cause an error.
     • set -o pipefail: This option ensures that a pipeline returns a failure status if any command in the pipeline fails.

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import forge from 'node-forge';


const encryptAESKey = (AESKey, publicKey) => {
  const publicKeyPem = forge.pki.publicKeyFromPem(publicKey);
  const rsaEncryptedAesKey = publicKeyPem.encrypt(AESKey, 'RSA-OAEP');
  return forge.util.encode64(rsaEncryptedAesKey);
}

const encryptText = (text, key, iv) => {

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set -o nounset
set -o pipefail
PATH="/sbin"
EXT=enp3s0
INT_NET=192.168.0.0/24
echo "Flushing rules"
iptables -F
iptables -t nat -F
iptables -t mangle -F
iptables -X

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PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

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Install WordPress plugins directly (without FTP)

Ref Stack Overflow Comment

Put this on your wp-config.php

/* That's all, stop editing! Happy blogging. */
define('FS_METHOD', 'direct');

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ssh-keygen -t rsa -b 4096  -f ~testuser/sftp_key -N ''
chown testuser ~testuser/sftp_key*
aws transfer  import-ssh-public-key --server-id ${SftpServer.ServerId} --ssh-public-key-body  "$(cat ~testuser/sftp_key.pub)"  --user-name  sftpuser  --region ${AWS::Region}

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[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"

[packages]
pytz = "*"
pyexcel = "*"
requests = "*"
chardet = "*"

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from passlib.hash import sha512_crypt as sha512
import bsddb3
import string
import random
import sys


""" BerkleyDB Python Client (write & read)

unix terminal command to dump a berkley database

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import json
import sys

"""JSON Digest

Python script to digest a JSON structure.

Tasks:
    1. Get each key name and corresponding value
        a. Get the current value.

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auth required pam_userdb.so db=/etc/vsftpd/vsftpd-virtual-user crypt=crypt
account required pam_userdb.so db=/etc/vsftpd/vsftpd-virtual-user crypt=crypt
session required pam_loginuid.so