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
コーディングルールの鮮度を保ちたい / keep-fresh-go-internal-conventions
handlename
0
180
TipKitTips
ktcryomm
0
160
Railsの気持ちを考えながらコントローラとビューを整頓する/tidying-rails-controllers-and-views-as-rails-think
moro
5
390
S3ストレージクラスの「見える」「ある」「使える」は全部違う ─ 体験から見た、仕様の深淵を覗く
ya_ma23
0
270
The Ralph Wiggum Loop: First Principles of Autonomous Development
sembayui
0
3.7k
CDIの誤解しがちな仕様とその対処TIPS
futokiyo
0
200
守る「だけ」の優しいEMを抜けて、 事業とチームを両方見る視点を身につけた話
maroon8021
3
700
Go 1.26でのsliceのメモリアロケーション最適化 / Go 1.26 リリースパーティ #go126party
mazrean
1
370
go directiveを最新にしすぎないで欲しい話──あるいは、Go 1.26からgo mod initで作られるgo directiveの値が変わる話 / Go 1.26 リリースパーティ
arthur1
2
530
maplibre-gl-layers - 地図に移動体たくさん表示したい
kekyo
PRO
0
240
RubyとGoでゼロから作る証券システム: 高信頼性が求められるシステムのコードの外側にある設計と運用のリアル
free_world21
0
260
What Spring Developers Should Know About Jakarta EE
ivargrimstad
0
360
Featured
See All Featured
Leveraging Curiosity to Care for An Aging Population
cassininazir
1
190
世界の人気アプリ100個を分析して見えたペイウォール設計の心得
akihiro_kokubo
PRO
67
37k
The Power of CSS Pseudo Elements
geoffreycrofte
82
6.2k
From Legacy to Launchpad: Building Startup-Ready Communities
dugsong
0
170
Building Applications with DynamoDB
mza
96
7k
30 Presentation Tips
portentint
PRO
1
250
How to build a perfect <img>
jonoalderson
1
5.2k
Neural Spatial Audio Processing for Sound Field Analysis and Control
skoyamalab
0
210
The #1 spot is gone: here's how to win anyway
tamaranovitovic
2
980
Mozcon NYC 2025: Stop Losing SEO Traffic
samtorres
0
170
Skip the Path - Find Your Career Trail
mkilby
1
75
Jess Joyce - The Pitfalls of Following Frameworks
techseoconnect
PRO
1
99
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