unixzen

#!/usr/bin/env python3

import httpx
import os
import json

BASE_YC_GPT_URL = "https://llm.api.cloud.yandex.net/foundationModels/v1/completion"


calculator_tool = {

unixzen

#!/usr/bin/env bash

# set -x

if [[ $EUID -ne 0 ]]; then
    echo "You must be root to run this script"
    exit 1
fi

# Returns all available interfaces, except "lo" and "veth*".

unixzen

IFACE=wlp2s0
NS="ns1"
VETH="veth1"
VPEER="vpeer1"
VETH_ADDR="10.200.1.1"
VPEER_ADDR="10.200.1.2"

ip li delete ${VETH} 2>/dev/null
# Remove namespace if it exists.
ip netns del $NS &>/dev/null

unixzen

The netfilter hooks in the kernel and where they hook in the packet flow

The figure below calls out

• The netfilter hooks
• The order of table traversal

unixzen

# ------------------------------------------------
# Config files are located in /etc/wireguard/wg0
# ------------------------------------------------

# ---------- Server Config ----------
[Interface]
Address = 10.10.0.1/24 # IPV4 CIDR 
Address = fd86:ea04:1111::1/64 # IPV6 CIDR 
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE; ip6tables -A FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -A POSTROUTING -o eth0 -j MASQUERADE # Add forwarding when VPN is started
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -D POSTROUTING -o eth0 -j MASQUERADE # Remove forwarding when VPN is shutdown

unixzen

# on a fresh Ubuntu 16.04 host
sudo apt-get update

# copy Ubuntu source packages from http://archive.ubuntu.com/ubuntu/pool/main/o/openssh

wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssh/openssh_7.6p1-4.dsc
wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssh/openssh_7.6p1.orig.tar.gz
wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssh/openssh_7.6p1.orig.tar.gz.asc
wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssh/openssh_7.6p1-4.debian.tar.xz

unixzen

# on a fresh Ubuntu 16.04 host
sudo apt-get update

# copy the packages from https://launchpad.net/debian/+source/openssh/1:7.4p1-10+deb9u3

wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/openssh/1:7.4p1-10/openssh_7.4p1-10.dsc
wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/openssh/1:7.4p1-10/openssh_7.4p1.orig.tar.gz
wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/openssh/1:7.4p1-10/openssh_7.4p1-10.debian.tar.xz

tar -zxvf openssh_7.4p1.orig.tar.gz

unixzen

openssh latest

Build, install, and run the latest OpenSSH Server as a systemd service.

---

• openssh latest
  • About
  • Prepare /opt
• apt install

unixzen

# Assumptions: easyrsa3 available in current dir, and functional openssl.
# This basic example puts the "offline" and "sub" PKI dirs on the same system.
# A real-world setup would use different systems and transport the public components.

# Build root CA:
EASYRSA_PKI=offline ./easyrsa init-pki
EASYRSA_PKI=offline ./easyrsa build-ca nopass

# Build sub-CA request:
EASYRSA_PKI=sub ./easyrsa init-pki

unixzen

How to disable systemd-resolved in Ubuntu

Stages

• Disable and stop the systemd-resolved service:

    sudo systemctl disable systemd-resolved.service
    sudo systemctl stop systemd-resolved
  

• Then put the following line in the [main] section of your /etc/NetworkManager/NetworkManager.conf: