Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
punchVPN-dansk
Search
Claus Lensbøl
May 13, 2013
Programming
290
1
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
punchVPN-dansk
Danish walk-through of the punchVPN program
Claus Lensbøl
May 13, 2013
Other Decks in Programming
See All in Programming
Seven New Principles of Software Engineering
yegor256
0
470
AI時代のTerminal環境を UNIX哲学で設計・運用する
yasunori0418
1
350
LLM 101
dalinaum
0
480
Engineering Biometric UX Across Android Versions | DroidKnights 2026
ryunen344
1
190
Lambda durable functionsでHuman in the Loopを楽に…楽に……
har1101
2
300
DroidKnights 2026 Android A2UI Jetpack Compose 기반의 안전한 AI UI 렌더링 - 박제창
itsmedreamwalker
1
210
느린 네트워크와 저사양 디바이스 사용자를 위한 웹뷰 로딩 시간 개선기
kmkim
1
220
Spec-driven Development with AI
simas
PRO
0
2.3k
Railsのためのパスキー実践入門 〜マルチテナントSaaSでの意思決定〜
utakaha
4
3.7k
Optunaを作ったときにやりたかったこと、その後 (2026/10/16, Optuna Meetup #3)
iwiwi
4
1.5k
クラウドエージェントは、 何がそんなに便利なのか / what makes cloud agents so useful
rkaga
5
810
AIで開発が速くなった先で、開発チームは何を目指すか
shihochan
1
2k
Featured
See All Featured
Build your cross-platform service in a week with App Engine
jlugia
234
19k
How to make the Groovebox
asonas
2
2.5k
[RailsConf 2023] Rails as a piece of cake
palkan
59
7.1k
Why Mistakes Are the Best Teachers: Turning Failure into a Pathway for Growth
auna
0
350
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
35
2.9k
Introduction to Domain-Driven Design and Collaborative software design
baasie
1
1.1k
The World Runs on Bad Software
bkeepers
PRO
72
12k
Designing for humans not robots
tammielis
254
26k
The Curse of the Amulet
leimatthew05
3
17k
Art, The Web, and Tiny UX
lynnandtonic
304
22k
Code Reviewing Like a Champion
maltzj
529
40k
Context Engineering - Making Every Token Count
addyosmani
9
1.3k
Transcript
punchVPN p2p VPN tunneler bag NAT
Facts • Klient - Python3.2 • Server - Python2.7 Kommende
Win32+OSX+UNIX support
Hvad skal det til for? • Sikkerhed • Anonymitet •
Direkte forbindelse
✘ Skidt måde at snakke sammen på A B 3.
part ☠ Forbindelse via 3. part Krypteret eller ukrypteret
✔ God måde at snakke sammen på A B 3.
part ☠ Direkte krypteret forbindelse udenom 3. part
Verdensbillede A B punch VPN Server Internet FW FW
Klient A -> Server A B punch VPN Server Internet
FW FW 1.
Klient B -> Server A B punch VPN Server Internet
FW FW 1. 2.
Klient A <-> Klient B A B punch VPN Server
Internet FW FW 1. 2. 3.
Forbindelsesmetoder A B punch VPN Server Internet FW FW 1.
2. 3. NAT-PMP UPnP-IGD UDP-HolePunch
Hvem kan forbinde? NAT-PMP UPnP-IGD Direct mapping Random mapping NAT-PMP
✔ ✔ ✔ ✔ UPnP-IGD ✔ ✔ ✔ ✔ Direct mapping ✔ ✔ ✔ ✘ Random mapping ✔ ✔ ✘ ✘
[code] punchVPNd/punchVPNd.py:108
NAT-PMP Dynamisk firewall
Hvordan virker det? • Simpel protokol • Apple-Bonjour
Bed om den eksterne IP adresse Data der skal sendes:
0b0000000000000000 Modtaget data: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Vers = 0 | OP = 128 + 0 | Result Code (net byte order) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Seconds Since Start of Epoch (in network byte order) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | External IPv4 Address (a.b.c.d) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Revisionerne, det nye def create_payload(self, local_port, external_port, lifetime): return pack('>2B3HI',
0, 1, 0, local_port, external_port, lifetime)
[code] natPMP/natPMP.py:49 natPMP/natPMP.py:70
Greenlets og Gevent Micro threads og long polling
Greenlets • Micro Threading • God scheduling
Gevent • Modul på libevent • Bruger Greenlets • Monkey-patcher
Python • Webserver
Long polling • Lange HTTP(S) kald • Næsten en socket
while(1): new_request_event.wait() if me.peer: msg = {'status': 'READY'} msg = json.dumps(msg) return msg new_request_event.set() new_request_event.clear()
[code] punchVPNd/punchVPNd.py:71 punchVPNd/punchVPNd.py:132
Et eksempel
Server og klient Hvordan hænger det sammen
JSON • Nemt at udvide • Ensartet syntax { "me.VPNaddr"
: "169.254.45.221", "me.mode" : "p2p", "peer.VPNaddr" : "169.254.45.222", "peer.ip" : "130.225.204.238", "peer.lport" : 15544, "status" : "READY" }
Demonstration Ellers er det jo bare en masse ord
UDP hole punching
[demo]
Spørgsmål? • https://github.com/cmol/punchVPN/ • https://twitter.com/lensboel • https://speakerdeck.com/cmol/punchvpn- dansk