# RVPN Server ## branch: passing-traffic - code now passes traffic using just daplie tools - this will require serve-https and node-tunnel-client to work ### Build RVPN ```bash hcamacho@Hanks-MBP:go-rvpn-server $ go get hcamacho@Hanks-MBP:go-rvpn-server $ go build ``` ### Setup Some Entries ```bash 127.0.0.1 tunnel.example.com rvpn.daplie.invalid hfc2.daplie.me hfc.daplie.me ``` ### Start Up Webserver ```bash hcamacho@Hanks-MBP:tmp $ cd /tmp hcamacho@Hanks-MBP:tmp $ vi index.html --- Place some index content hcamacho@Hanks-MBP:tmp $ serve-https -p 8080 -d /tmp --servername hfc.daplie.me --agree-tos --email henry.f.camacho@gmail.com ``` ### Start Tunnel Client ```bash hcamacho@Hanks-MBP:node-tunnel-client $ bin/stunnel.js --locals http://hfc.daplie.me:8080,http://test1.hfc.daplie.me:8080 --stunneld wss://localhost.daplie.me:8443 --secret abc123 ``` ### Execute RVPN ```bash hcamacho@Hanks-MBP:go-rvpn-server $ ./go-rvpn-server INFO: packer: 2017/03/02 19:16:52.652109 run.go:47: startup -=-=-=-=-=-=-=-=-=-= INFO: genericlistener: 2017/03/02 19:16:52.652777 manager.go:77: ConnectionTable starting INFO: genericlistener: 2017/03/02 19:16:52.652806 connection_table.go:67: ConnectionTable starting INFO: genericlistener: 2017/03/02 19:16:52.652826 manager.go:84: &{map[] 0xc420072420 0xc420072480} INFO: genericlistener: 2017/03/02 19:16:52.652832 connection_table.go:50: Reaper waiting for 300 seconds INFO: genericlistener: 2017/03/02 19:16:52.652856 manager.go:100: register fired 8443 INFO: genericlistener: 2017/03/02 19:16:52.652862 manager.go:110: listener starting up 8443 INFO: genericlistener: 2017/03/02 19:16:52.652868 manager.go:111: &{map[] 0xc420072420 0xc420072480} INFO: genericlistener: 2017/03/02 19:16:52.652869 conn_tracking.go:25: Tracking Running ``` ### Browse via tunnel https://hfc.daplie.me:8443 - You'll notice that the browser is redirected to 8080 after accepting the cert. I see a meta-refresh coming back from the serve-https - The traffic is getting back to the client. ```bash INFO: genericlistener: 2017/03/02 21:24:48.472312 connection.go:207: 00000000 fe 1d 49 50 76 34 2c 31 32 37 2e 30 2e 30 2e 31 |..IPv4,127.0.0.1| 00000010 2c 35 33 35 35 39 2c 33 36 38 2c 68 74 74 70 48 |,53559,368,httpH| 00000020 54 54 50 2f 31 2e 31 20 32 30 30 20 4f 4b 0d 0a |TTP/1.1 200 OK..| 00000030 43 6f 6e 74 65 6e 74 2d 54 79 70 65 3a 20 74 65 |Content-Type: te| 00000040 78 74 2f 68 74 6d 6c 3b 20 63 68 61 72 73 65 74 |xt/html; charset| 00000050 3d 75 74 66 2d 38 0d 0a 44 61 74 65 3a 20 46 72 |=utf-8..Date: Fr| 00000060 69 2c 20 30 33 20 4d 61 72 20 32 30 31 37 20 30 |i, 03 Mar 2017 0| 00000070 33 3a 32 34 3a 34 38 20 47 4d 54 0d 0a 43 6f 6e |3:24:48 GMT..Con| 00000080 6e 65 63 74 69 6f 6e 3a 20 6b 65 65 70 2d 61 6c |nection: keep-al| 00000090 69 76 65 0d 0a 43 6f 6e 74 65 6e 74 2d 4c 65 6e |ive..Content-Len| 000000a0 67 74 68 3a 20 32 32 37 0d 0a 0d 0a 3c 68 74 6d |gth: 227...... ....<| 00000180 2f 62 6f 64 79 3e 0a 3c 2f 68 74 6d 6c 3e 0a |/body>..| ``` - this set of code works great if I am running the node-tunnel-client on a different machine with apache as a web server. - need to work through why serve-https thinks the traffic is inecure. ## restructured-http - connection handling has been totally rewritten. - on a specific port RVPN can determine the following: - if a connection is encrypted or not encrypted - if a request is a wss_client - if a request is an admin/api request - if a request is a plain (to be forwarded) http request - or if a request is a different protocol (perhaps SSH) To accomplish the above RVPN uses raw TCP sockets, buffered readers, and a custom Listener. This allows protocol detection (multiple services on one port) If we expose 443 and 80 to maximize the ability for tunnel clients and south bound traffic, the RVPN is able to deal with this traffic on a limited number of ports, and the most popular ports. It is possible now to meter any point of the connection (not Interface Level, rather TCP) There is now a connection manager that dynamically allows new GenericListeners to start on different ports when needed.... ```go newListener := NewListenerRegistration(initialPort) gl.register <- newListener ``` A new listener is created by sending a NewListenerRegistration on the channel. ```go ln, err := net.ListenTCP("tcp", listenAddr) if err != nil { loginfo.Println("unable to bind", err) listenerRegistration.status = listenerFault listenerRegistration.err = err listenerRegistration.commCh <- listenerRegistration return } listenerRegistration.status = listenerAdded listenerRegistration.commCh <- listenerRegistration ``` Once the lister is fired up, I sends back a regisration status to the manager along with the new Listener and status. ### Build ```bash hcamacho@Hanks-MBP:go-rvpn-server $ go get hcamacho@Hanks-MBP:go-rvpn-server $ go build ``` ### Execute RVPN ```bash hcamacho@Hanks-MBP:go-rvpn-server $ ./go-rvpn-server INFO: packer: 2017/02/26 12:43:53.978133 run.go:48: startup -=-=-=-=-=-=-=-=-=-= INFO: connection: 2017/02/26 12:43:53.978959 connection_table.go:67: ConnectionTable starting INFO: connection: 2017/02/26 12:43:53.979000 connection_table.go:50: Reaper waiting for 300 seconds ``` ### Connect Tunnel client ```bash hcamacho@Hanks-MBP:node-tunnel-client $ bin/stunnel.js --locals http://hfc.daplie.me:8443,http://test.hfc.daplie.me:3001,http://127.0.0.1:8080 --stunneld wss://localhost.daplie.me:8443 --secret abc123 [local proxy] http://hfc.daplie.me:8443 [local proxy] http://test.hfc.daplie.me:3001 [local proxy] http://127.0.0.1:8080 [connect] 'wss://localhost.daplie.me:8443' [open] connected to 'wss://localhost.daplie.me:8443' ``` ### Connect Admin - add a host entry ``` 127.0.0.1 tunnel.example.com rvpn.daplie.invalid ``` ```bash browse https://rvpn.daplie.invalid:8443 ``` ### Send some traffic - run the RVPN (as above) - run the tunnel client (as above) - browse http://127.0.0.1:8443 && https://127.0.0.1:8443 - observe ```bash hcamacho@Hanks-MBP:node-tunnel-client $ bin/stunnel.js --locals http://hfc.daplie.me:8443,http://test.hfc.daplie.me:3001,http://127.0.0.1:8080 --stunneld wss://localhost.daplie.me:8443 --secret abc123 [local proxy] http://hfc.daplie.me:8443 [local proxy] http://test.hfc.daplie.me:3001 [local proxy] http://127.0.0.1:8080 [connect] 'wss://localhost.daplie.me:8443' [open] connected to 'wss://localhost.daplie.me:8443' hello 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 �IPv4,127.0.0.1,8080,413,httpGET / HTTP/1.1 Host: 127.0.0.1:8443 Connection: keep-alive Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Encoding: gzip, deflate, sdch, br Accept-Language: en-US,en;q=0.8 [exit] loop closed 0 ``` Looks like it aborts for some reaon. I have this problem on on a new installation as well. -=-=-=-=-=-= A Poor Man's Reverse VPN written in Go Context ------- Even in the worst of conditions the fanciest of firewalls can't stop a WebSocket running over https from creating a secure tunnel. Whether at home behind a router that lacks UPnP compliance, at school, work, the library - or even on an airplane, we want any device (or even a browser or app) to be able to serve from anywhere. Motivation ---------- We originally wrote this in node.js as [node-tunnel-server](https://git.daplie.com/Daplie/node-tunnel-server), but there are a few problems: * metering * resource utilization * binary transfer ### metering We want to be able to meter all traffic on a socket. In node.js it wasn't feasible to be able to track the original socket handle all the way back from the web socket authentication through the various wrappers. A user connects via a websocket to the tunnel server and an authentication token is presented. If the connection is established the socket should then be metered and reported including total bytes sent and received and size of payload bytes sent and received (because the tunnelling adds some overhead). ### resource utilization node.js does not support usage of multiple cores in-process. The overhead of passing socket connections between processes seemed non-trivial at best and likely much less efficient, and impossible at worst. ### binary transfer node.js doesn't handle binary data very well. People will be transferring gigabytes of data. Short Term Goal ---- Build a server compatible with the node.js client (JWT authentication) that can meter authenticated connections, utilize multiple cores efficiently, and efficienty garbage collect gigabytes upon gigabytes of transfer.