Callisthenes Don andmeics

使用ffmpeg合并MP4文件

ffmpeg -i "Apache Sqoop Tutorial Part 1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i "Apache Sqoop Tutorial Part 2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "Apache Sqoop Tutorial Part 3.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate3.ts
ffmpeg -i "Apache Sqoop Tutorial Part 4.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate4.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts|intermediate3.ts|intermediate4.ts" -c copy -bsf:a aac_adtstoasc "Apache Sqoop Tutorial.mp4"

A Key Server is used to distribute PGP/GPG keys between different users. One of the most popular key servers for use with pgp/gpg is the sks keyserver. This document will walk you through downloading, installing, and setting up a sks keyserver on Ubuntu 18.04 LTS.

Building your own PGP SKS Server

Building a SKS server is a pretty straight forward project if you are use to running servers.

To build a production SKS Server, you must...

Building the SKS Daemon
Download the needed database files
Import the downloaded databases files

调查目的：了解当前各基于TLS的协议方案中ClientHello的指纹独特性。理论背景见 https://arxiv.org/abs/1607.01639 。

指纹数据库：

naiveproxy v78.0.3904.70-4

（利益相关：我是这个的作者）

WireGuard Site-to-Site

Accessing a subnet that is behind a WireGuard client using a site-to-site setup

Problem Summary

We want to access a local subnet remotely, but it is behind a NAT firewall and we can't setup port forwarding. Outgoing connections work, but all incoming connections get DROPPED by the ISP's routing policy.

	id: SQLInjection_ERROR

	info:
	name: SQLINJECTION Detection
	author: 0x240x23elu & OFJAAAH
	severity: High

	requests:
	- method: GET

	$ LD_PRELOAD=$PWD/sendmsg.so dig twitter.com @8.8.8.8
	;; Warning: Message parser reports malformed message packet. <-- malformed 因为把压缩指针当作域名一部分了
	;; Question section mismatch: got twitter.com/RESERVED0/CLASS256

	; <<>> DiG 9.9.5-3-Ubuntu <<>> twitter.com @8.8.8.8
	;; global options: +cmd
	;; Got answer:
	;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44722
	;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

	(0)marcin@behemoth httpie$ http www.google.com
	HTTP/1.1 200 OK
	Set-Cookie: NID=62=OkysShRlKzSK4Xcj7d6gWCyMEtWSP3pZLH-zQTAlpvNwfdTeQoNYMEJZ7rP9-5mp10kHJrAsvCOUQ2xSabno_saUgP38ajjz24GAwQ9jEEzGog7T2JqcUfIqUa2fILO3; expires=Sat, 26-Jan-2013 19:29:45 GMT; path=/; domain=.google.com; HttpOnly
	Date: Fri, 27 Jul 2012 19:29:45 GMT
	Expires: -1
	Cache-Control: private, max-age=0
	Content-Type: text/html; charset=ISO-8859-1
	Set-Cookie: expires=; expires=Mon, 01-Jan-1990 00:00:00 GMT; path=/; domain=www.google.com
	Set-Cookie: path=; expires=Mon, 01-Jan-1990 00:00:00 GMT; path=/; domain=www.google.com
	Set-Cookie: domain=; expires=Mon, 01-Jan-1990 00:00:00 GMT; path=/; domain=www.google.com