Upgrade to PRO for Only $50/Year—Limited-Time Offer! 🔥
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
punchVPN-dansk
Search
Claus Lensbøl
May 13, 2013
Programming
1
260
punchVPN-dansk
Danish walk-through of the punchVPN program
Claus Lensbøl
May 13, 2013
Tweet
Share
Other Decks in Programming
See All in Programming
フルサイクルエンジニアリングをAI Agentで全自動化したい 〜構想と現在地〜
kamina_zzz
0
290
AI 駆動開発ライフサイクル(AI-DLC):ソフトウェアエンジニアリングの再構築 / AI-DLC Introduction
kanamasa
11
3.9k
生成AI時代を勝ち抜くエンジニア組織マネジメント
coconala_engineer
0
9.2k
tparseでgo testの出力を見やすくする
utgwkk
2
280
Canon EOS R50 V と R5 Mark II 購入でみえてきた最近のデジイチ VR180 事情、そして VR180 静止画に活路を見出すまで
karad
0
140
Python札幌 LT資料
t3tra
7
1k
AIコーディングエージェント(NotebookLM)
kondai24
0
230
ZJIT: The Ruby 4 JIT Compiler / Ruby Release 30th Anniversary Party
k0kubun
1
280
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
350
Combinatorial Interview Problems with Backtracking Solutions - From Imperative Procedural Programming to Declarative Functional Programming - Part 2
philipschwarz
PRO
0
110
Navigating Dependency Injection with Metro
l2hyunwoo
1
180
The Art of Re-Architecture - Droidcon India 2025
siddroid
0
130
Featured
See All Featured
What does AI have to do with Human Rights?
axbom
PRO
0
1.9k
エンジニアに許された特別な時間の終わり
watany
106
220k
コードの90%をAIが書く世界で何が待っているのか / What awaits us in a world where 90% of the code is written by AI
rkaga
57
39k
SEO Brein meetup: CTRL+C is not how to scale international SEO
lindahogenes
0
2.2k
The Invisible Side of Design
smashingmag
302
51k
Exploring anti-patterns in Rails
aemeredith
2
210
ReactJS: Keep Simple. Everything can be a component!
pedronauck
666
130k
Sam Torres - BigQuery for SEOs
techseoconnect
PRO
0
140
HU Berlin: Industrial-Strength Natural Language Processing with spaCy and Prodigy
inesmontani
PRO
0
100
技術選定の審美眼(2025年版) / Understanding the Spiral of Technologies 2025 edition
twada
PRO
115
93k
16th Malabo Montpellier Forum Presentation
akademiya2063
PRO
0
30
Chasing Engaging Ingredients in Design
codingconduct
0
84
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