Difference between revisions of "Freifunk:VPN1"

Revision as of 10:25, 3 June 2007

Dieser Node besteht momentan aus einem Soekris 4501 Board und soll die Verbindung zwischen den einzelnen Funkwolken in Hamburg und Freifunk Initiativen in anderen Staedten herstellen. Als VPN Software wird Tinc-VPN eingesetzt, wobei allerdings in Zukunft vermutlich auch andere VPN Protokolle unterstuetzt werden koennen. Eine kleine Hilfestellung auf Basis von OpenWRT kann man hier finden: Freifunk:IP:VPN_Connect

Interfaces

Hier eine kurze Uebersicht ueber die verschiedenen Netzwerk-Interfaces.

eth0

Das eth0 Interface ist momentan noch ungenutzt.

Interface Name: eth0
IP Adresse    : none
Hostname      : none
Description   : not used yet
Bandwidth     : 0bit

eth1

Das eth1 Interface ist zwar up, wird aber in der Regel ebenfalls nicht genutzt.

Interface Name: eth1
IP adresse    : 193.158.228.140
Hostname      : none
Description   : secondary uplink
Bandwidth     : 1500kbit/s

eth2

Ueber das eth2 Interface wird momentan die ganze VPN Geschichte abgewickelt. Es ist moeglich per SSH sich einzuloggen, sofern man den dafuer noetigen Account, oder Exploit hat. Das Tinc-VPN lauscht hier auf den Ports 655 und 656.

Interface Name: eth2
IP adresse    : 62.206.27.20
Hostname      : vpn1.hamburg.freifunk.net
Description   : primary uplink
Bandwidth     : 4000kbit/s

ffhh

Dieses Interface ist fuer das Hamburger Freifunk Netz eingerichtet. Tinc-VPN setzt dieses Interface in den TAP-Modus, damit Pakete zwischen den einzelnen VPN Clients wie bei einem Switch verschickt werden koennen. Der OLSR Daemon sendet seine Pakete an die Broadcast-Adresse (10.127.255.255) ueber dieses Interface.

Interface Name: ffhh
IP Adresse    : 10.112.1.1/12
Hostname      : none
Description   : Freifunk Hamburg
Software      : tinc-vpn, olsrd
Tinc-Port     : 656

ffvpn

Fuer das InterCity-VPN wurde dieses Interface eingerichtet. Tinc-VPN setzt auch dieses Interface in den TAP-Modus und die Quagga Routing Suite kuendigt den Hamburger Freifunk IP-Bereich an entfernte BGP-Router. Wir verwenden die interne AS-Nummer 65044 fuer das BGP-Peering.

Interface Name: ffvpn
IP Adresse    : 10.207.0.9/16
Hostname      : hamburg-r1.hamburg.freifunk.net
Description   : tunnel staedtekopplung
Software      : tinc-vpn, quagga(bgpd)
Tinc-Port     : 655
AS-Number     : 65044

Konfigurationen

Tinc-VPN

Hamburger Freifunk VPN (ffhh)

ffhh/tinc.conf

AddressFamily=ipv4
Name = vpn1
PrivateKeyFile = /etc/tinc/ffhh/rsa_key.priv
Mode = Switch
PingTimeout = 30
Port = 656
BindToAddress = 62.206.27.20
Hostnames=yes
#ConnectTo = vpn2

# CCCHH
ConnectTo = lok72

# Dennis
ConnectTo = elan

# Cnud
#ConnectTo = cgre

# JensM
#ConnectTo = Stockholm

ffhh/tinc-up

#!/bin/sh
ip addr add dev $INTERFACE 10.112.1.1/12 broadcast 10.127.255.255
ip link set dev $INTERFACE up

ffhh/tinc-down

#!/bin/sh
ip link set dev $INTERFACE down
ip addr del 10.112.1.1 dev $INTERFACE

ffhh/hosts/vpn1

Address = vpn1.hamburg.freifunk.net
Cipher=blowfish
Compression=0
Digest=sha1
IndirectData=no
Port = 656
-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBAKVI9lNEiJ3JVDuXhsLKdqhE+k14bCM8cYaAReNrzBSDODxuLm+pPKwo
+7SgYW2/vAdnbFX689yKIs9inbQGNrakQQS/84pQ4TyN+H1dkhmxn5hweF/Ci3Qp
UxzfjeVmeH2L+ecVOgWK10aoUhfVGvCVB3UpoCT6GrQwOa8gB5vfAgMBAAE=
-----END RSA PUBLIC KEY-----

ffhh/hosts/elan

Address = elan.ainex.net
Port = 656
-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBALHyO9nsCFXUSlvaBRHZX4DMFTg2xvVPx2Vhtv0NPKIFeSMRNJ1tfuTN
ZhFGT0yUpl2QdCf6Xm6k6gMyEIMgeRSNDTRmm/rgli7EnCA1wEIc30BFP7MHkzx7
1oYD/jQxJIWCyjW3kH1Ui3WkZHws8rvpALcicFSBgvCk7QzYq09nAgMBAAE=
-----END RSA PUBLIC KEY-----

InterCity VPN (ffvpn)

ffvpn/tinc.conf

Name = hhvpn1
PrivateKeyFile = /etc/tinc/ffvpn/rsa_key.priv
Mode = Switch
PingTimeout = 30
#TCPOnly = yes
Port = 655
Hostnames=yes
BindToAddress = 62.206.27.20
ConnectTo = hhvpn2
ConnectTo = berlin1
ConnectTo = ffhallevpn1

ffvpn/tinc-up

#!/bin/sh
ip addr add dev $INTERFACE 10.207.0.9/16 broadcast 10.207.255.255
ip link set dev $INTERFACE up
iptables -A FORWARD -i ffhh -s 10.112.0.0/12   -o ffvpn -j ACCEPT                                               # FF Hamburg -> FF Global

ffvpn/tinc-down

#!/bin/sh
ip link set dev $INTERFACE down
ip addr del 10.207.0.9 dev $INTERFACE
iptables -D FORWARD -i ffhh -s 10.112.0.0/12   -o ffvpn -j ACCEPT

ffvpn/hosts/hhvpn1

Address = vpn1.hamburg.freifunk.net
Port = 655
-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBAL5ld4OnWv52XD8q0MbfW+DLUe2lCaHLyf4XacwqOhjvS5RH+iAyPgIc
BZJEtmKjW+FrPRLTtJVeptlLWGJr+EE2/G3fq0/AbQDhzIT7OnqCNGrMC1YzNOZm
C8CVyiPwELdvBL+Z7j6Jq545/1zZ/H+z1EK6xuucjhwITFqMQrdxAgMBAAE=
-----END RSA PUBLIC KEY-----

ffvpn/hosts/berlin1

address = vpn-ic1.berlin.freifunk.net
-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBALfEgQh1Po7B5/IP57pZT0iRjY+8GVfGgkYB7dFIANk/iSWjThe9pERm
x4GGx2NNoiNoDVdUtSz41oIc65bd651G01e2A1bnFQ9qRc9rZ/S91SqpO0+KheYw
judU2Mc81XkKQ38e9rgtU/OvWOF1Hq2EOOork2cePsC8QRa9oAa5AgMBAAE=
-----END RSA PUBLIC KEY-----

ffvpn/hosts/ffhallevpn1

Address = vpn1.freifunk-halle.de
Address = 88.198.51.136
Port = 655
-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBALF/Wu4pe+f3dHeLYApHxUnOGUBzpNREUet6nDp80uWT/dph7h6Yqtz2
XMkifjDjSDnHPa1l1LwWFXkTKVQLH4lUrDuadXMU+BSEJWO36vg/A9E3AjbzoTA7
RY6Gzx+FOXqTGOtqzEPMLkBGTrslerpw9JzfCgLlxLLCXg8Tri8ZAgMBAAE=
-----END RSA PUBLIC KEY-----

Quagga

InterCity-VPN

bgpd.conf

!
! Zebra configuration saved from vty
!   2007/04/19 08:19:20
!
hostname hh-r1
password 8 pophase
enable password 8 blasehase
log file /var/log/bgpd.log informational
log syslog informational
service advanced-vty
service password-encryption
!
!debug bgp events
!
router bgp 65044
 bgp router-id 10.207.0.9
 bgp log-neighbor-changes
 network 10.112.0.0/13
 network 10.120.0.0/14
 network 10.124.0.0/15
 network 10.126.0.0/16
 neighbor ff-peers peer-group
 neighbor ff-peers update-source 10.207.0.9
 neighbor ff-peers distribute-list hamburg-out out
 
 neighbor 10.207.0.1 remote-as 65041
 neighbor 10.207.0.1 peer-group ff-peers
 neighbor 10.207.0.1 description leipzig1
 
 neighbor 10.207.0.2 remote-as 65041
 neighbor 10.207.0.2 description leipzig2
 neighbor 10.207.0.2 peer-group ff-peers
 
 neighbor 10.207.0.3 remote-as 65042
 neighbor 10.207.0.3 description weimar1
 neighbor 10.207.0.3 peer-group ff-peers
 
 neighbor 10.207.0.4 remote-as 65042
 neighbor 10.207.0.4 description weimar2
 neighbor 10.207.0.4 peer-group ff-peers
 
 neighbor 10.207.0.5 remote-as 65040
 neighbor 10.207.0.5 description berlin1
 neighbor 10.207.0.5 peer-group ff-peers
 
 neighbor 10.207.0.6 remote-as 65040
 neighbor 10.207.0.6 description berlin2
 neighbor 10.207.0.6 peer-group ff-peers
 
 neighbor 10.207.0.7 remote-as 65043
 neighbor 10.207.0.7 description erfurt1
 neighbor 10.207.0.7 peer-group ff-peers
 
 neighbor 10.207.0.8 remote-as 65043
 neighbor 10.207.0.8 description erfurt2
 neighbor 10.207.0.8 peer-group ff-peers
 
 neighbor 10.207.0.11 remote-as 65045
 neighbor 10.207.0.11 description stuttgart1
 neighbor 10.207.0.11 peer-group ff-peers
 
 neighbor 10.207.0.12 remote-as 65045
 neighbor 10.207.0.12 description stuttgart2
 neighbor 10.207.0.12 peer-group ff-peers
 
 neighbor 10.207.0.13 remote-as 65046
 neighbor 10.207.0.13 peer-group ff-peers
 neighbor 10.207.0.13 description halle1
 
 neighbor 10.207.0.14 remote-as 65046
 neighbor 10.207.0.14 peer-group ff-peers
 neighbor 10.207.0.14 description halle2
 
 neighbor 10.207.1.1 remote-as 35492
 neighbor 10.207.1.1 description wien1
 neighbor 10.207.1.1 peer-group ff-peers
 
 neighbor 10.207.1.2 remote-as 35492
 neighbor 10.207.1.2 description wien2
 neighbor 10.207.1.2 peer-group ff-peers
 
 distance bgp 150 150 150
!
access-list access permit 127.0.0.1/32
access-list access deny any

access-list all deny 192.168.0.0/16
access-list all deny 10.112.0.0/12
access-list all permit any

access-list hamburg-in deny 10.4.0.0/14
access-list hamburg-in deny 10.32.0.0/12
access-list hamburg-in deny 10.112.0.0/12
access-list hamburg-in deny 192.168.0.0/16
access-list hamburg-in permit any

access-list hamburg-out permit 10.112.0.0/13
access-list hamburg-out permit 10.120.0.0/14
access-list hamburg-out permit 10.124.0.0/15
access-list hamburg-out permit 10.126.0.0/16
access-list hamburg-out deny any
!
line vty
 access-class access
!