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
CSC307 Lecture 03
javiergs
PRO
1
490
カスタマーサクセス業務を変革したヘルススコアの実現と学び
_hummer0724
0
690
Oxlint JS plugins
kazupon
1
900
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
560
AgentCoreとHuman in the Loop
har1101
5
230
16年目のピクシブ百科事典を支える最新の技術基盤 / The Modern Tech Stack Powering Pixiv Encyclopedia in its 16th Year
ahuglajbclajep
5
1k
0→1 フロントエンド開発 Tips🚀 #レバテックMeetup
bengo4com
0
560
AI & Enginnering
codelynx
0
110
CSC307 Lecture 09
javiergs
PRO
1
830
humanlayerのブログから学ぶ、良いCLAUDE.mdの書き方
tsukamoto1783
0
190
IFSによる形状設計/デモシーンの魅力 @ 慶應大学SFC
gam0022
1
300
AWS re:Invent 2025参加 直前 Seattle-Tacoma Airport(SEA)におけるハードウェア紛失インシデントLT
tetutetu214
2
110
Featured
See All Featured
Amusing Abliteration
ianozsvald
0
100
What’s in a name? Adding method to the madness
productmarketing
PRO
24
3.9k
Fashionably flexible responsive web design (full day workshop)
malarkey
408
66k
Marketing Yourself as an Engineer | Alaka | Gurzu
gurzu
0
130
Exploring anti-patterns in Rails
aemeredith
2
250
AI Search: Where Are We & What Can We Do About It?
aleyda
0
6.9k
SEO Brein meetup: CTRL+C is not how to scale international SEO
lindahogenes
0
2.3k
Building Flexible Design Systems
yeseniaperezcruz
330
40k
Max Prin - Stacking Signals: How International SEO Comes Together (And Falls Apart)
techseoconnect
PRO
0
84
Navigating the moral maze — ethical principles for Al-driven product design
skipperchong
2
240
A better future with KSS
kneath
240
18k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
49
3.3k
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