ihciah

科学搭建国内VPN转发服务器

简介

• 简单拓扑结构：国内-(ocserv)-国内中转服务器-(shadowvpn)-国外服务器
• 实验环境：用户终端为iPhone，中转服务器及国外服务器均为Ubuntu 14.04

搭建过程

• 搭建Ocserv
  • 打开ftp://ftp.infradead.org/pub/ocserv/找到最新版本并下载、解压
  • 安装依赖:

ihciah

use std::cell::RefCell;
use std::pin::Pin;
use std::task::Context;
use std::task::Poll;
use std::task::ready;

use futures::Stream;
use futures::TryFuture;
use futures::stream::FuturesUnordered;
use futures::stream::StreamExt;

ihciah

Ansible playbook to upgrade packages

Modify hosts and run ansible-playbook -i hosts upgrade.yaml.

Note: On debain to make reboot detect work, you may install unattended-upgrades.

ihciah

Policy Routing VPN with Tinc and Nftables

This is just a personal backup, but if it helps you, that's even better.

Target

1. Make linux work as a router.
2. For domestic targets, connect them directly.
3. For traffic that need to bypass the firewall, use VPN.

Setup

ihciah

Configure v2ray with cloudflare with docker and docker-compose

• caddy-*: http server related files
• v2ray-*: v2ray related files
• forword-*: files to relay requests

ihciah

Pwnable.kr echo1 writeup

ihciah@gmail.com

At first glance, I thought there are 3 ways to exploit this problem, since it gives me 3 choices: BOF, FSB, UAF, however, the last two are not available.

In echo1, it calls get_input to input 128 input, but the buffer equals to bp-20h, so it can only save data with max length of 32.

Above the return address is the old rbp, so we can write 32 + 8 trash and an address to jump to to overflow it.

After searching with jmpcall si in peda, we found no result.

ihciah

A reverse proxy for Telegram Bot API on Aliyun Function Compute / Cloudflare Workers

To help users in China mainland access telegram api stably and conveniently with low cost, this script maybe the one you need.

The server-less means you don't have to run a server to proxy the requests, just pay as you go.

Usage

Edit key_prefix, set it to the prefix of you bot address(like /bot563441998:) can avoid abusing.

ihciah

#!/usr/bin/python
# -*- coding: utf-8 -*-
# __author__ = 'ihciah'
# cid_hash_file function from https://github.com/binux/lixian.xunlei/blob/master/libs/tools.py
# Gist: https://gist.github.com/ihciah/30eda05ca36ee9f9f190067538b0ae04

import hashlib
import inotify.adapters
import os
import sys

ihciah

Pwnable.kr simple login writeup

ihciah@gmail.com

(Too lazy to review lessons before exam... Load with IDA and found:

_BOOL4 __cdecl auth(int a1)
{
  char v2; // [sp+14h] [bp-14h]@1
  char *s2; // [sp+1Ch] [bp-Ch]@1

ihciah

.editor-group-watermark > .letterpress{
  background-image: url("https://raw.githubusercontent.com/Aikoyori/ProgrammingVTuberLogos/main/VSCode/VSCode.png") !important;
  opacity: .75;
}