Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
punchVPN-dansk
Search
Sponsored
·
Ship Features Fearlessly
Turn features on and off without deploys. Used by thousands of Ruby developers.
→
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
疑似コードによるプロンプト記述、どのくらい正確に実行される?
kokuyouwind
0
380
QAフローを最適化し、品質水準を満たしながらリリースまでの期間を最短化する #RSGT2026
shibayu36
2
4.4k
OCaml 5でモダンな並列プログラミングを Enjoyしよう!
haochenx
0
140
Architectural Extensions
denyspoltorak
0
280
インターン生でもAuth0で認証基盤刷新が出来るのか
taku271
0
190
高速開発のためのコード整理術
sutetotanuki
1
400
LLM Observabilityによる 対話型音声AIアプリケーションの安定運用
gekko0114
2
430
AI Agent Tool のためのバックエンドアーキテクチャを考える #encraft
izumin5210
6
1.8k
CSC307 Lecture 06
javiergs
PRO
0
680
Fragmented Architectures
denyspoltorak
0
150
360° Signals in Angular: Signal Forms with SignalStore & Resources @ngLondon 01/2026
manfredsteyer
PRO
0
120
Automatic Grammar Agreementと Markdown Extended Attributes について
kishikawakatsumi
0
190
Featured
See All Featured
The Impact of AI in SEO - AI Overviews June 2024 Edition
aleyda
5
730
Groundhog Day: Seeking Process in Gaming for Health
codingconduct
0
92
Digital Projects Gone Horribly Wrong (And the UX Pros Who Still Save the Day) - Dean Schuster
uxyall
0
340
Skip the Path - Find Your Career Trail
mkilby
0
54
Utilizing Notion as your number one productivity tool
mfonobong
3
220
The Spectacular Lies of Maps
axbom
PRO
1
520
Automating Front-end Workflow
addyosmani
1371
200k
svc-hook: hooking system calls on ARM64 by binary rewriting
retrage
1
99
Discover your Explorer Soul
emna__ayadi
2
1.1k
Become a Pro
speakerdeck
PRO
31
5.8k
Max Prin - Stacking Signals: How International SEO Comes Together (And Falls Apart)
techseoconnect
PRO
0
84
Into the Great Unknown - MozCon
thekraken
40
2.3k
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