Nicolai Søborg NicolaiSoeborg

adduser --system coredns --home /var/lib/coredns

Create /etc/systemd/system/coredns.service:

[Unit]
Description=CoreDNS DNS server
Documentation=https://coredns.io
After=network.target

[Service]

TL;DR: Grab this value jq -r '.location' $(sudo -u caddy caddy environ | awk -F'=' '/^caddy.AppDataDir=/{print $2"/acme/acme-v02.api.letsencrypt.org-directory/users/*/caddy.json"}') and jump to step 4.
In your Caddyfile you should add an email to the Global Options Block:

{
	email [email protected]
}

	import httpx
	from flask import Flask

	app = Flask(__name__)

	def ctfd_to_ctftime(data):
	for row in data:
	if row['account_type'] == 'team':
	yield {'pos': row['pos'], 'team': row['name'], 'score': row['score']}

	import asyncio

	TARGET_IP = '1.2.3.4'

	async def print_lines(port, process):
	while True:
	line = await process.stdout.readline()
	if not line:
	print(f"[{port}]: Died?")
	break

	import trio

	DOMAIN = "example.com"
	PATH = "/"

	async def main():
	s0 = await trio.open_ssl_over_tcp_stream(DOMAIN, 443, https_compatible=True)

	# Request a connection to the website
	await s0.send_all(f"GET {PATH} HTTP/1.1\r\nHost: {DOMAIN}\r\n\r\n".encode())

	import httpx
	from flask import Flask, request

	URL = 'http://example.com/vuln'
	client = httpx.Client(http2=True)
	app = Flask(__name__)

	@app.route("/vuln")
	def hello_world():
	param = request.args['q']

	import angr

	proj = angr.Project("./chal", auto_load_libs=False)
	state = proj.factory.entry_state()
	simgr = proj.factory.simulation_manager(state)
	simgr.explore(find=lambda s: b"Correct!" in s.posix.dumps(1))
	# Out[6]: <SimulationManager with 2 active, 34 deadended, 1 found>

	print(simgr.found[0].posix.dumps(0))

	import trio # python3 -m pip install --upgrade trio

	HTML = "<html>Hello World!</html>"
	HTTP_BANNER = f"HTTP/1.1 200 OK\nContent-Length: {len(HTML)+1}\n\n{HTML}\n".encode()

	async def forward_from_a_to_b(a, b):
	async for chunk in a:
	print(f"=> {chunk}", flush=True)
	await b.send_all(chunk)