54 lines
1.5 KiB
Bash
54 lines
1.5 KiB
Bash
#!/bin/sh
|
|
# $FreeBSD$
|
|
|
|
# This script sets up a virtual point-to-point WAN link between
|
|
# two subnets, using UDP packets as the ``WAN connection.''
|
|
# The two subnets might be non-routable addresses behind a
|
|
# firewall.
|
|
#
|
|
|
|
# Here define the local and remote inside networks as well
|
|
# as the local and remote outside IP addresses and UDP port
|
|
# number that will be used for the tunnel.
|
|
#
|
|
LOC_INTERIOR_IP=192.168.1.1
|
|
LOC_EXTERIOR_IP=1.1.1.1
|
|
REM_INTERIOR_IP=192.168.2.1
|
|
REM_EXTERIOR_IP=2.2.2.2
|
|
REM_INSIDE_NET=192.168.2.0
|
|
UDP_TUNNEL_PORT=4028
|
|
|
|
# Create the interface node ``ng0'' if it doesn't exist already,
|
|
# otherwise just make sure it's not connected to anything.
|
|
# In FreeBSD, interfaces cannot be removed so it might already
|
|
# be there from before.
|
|
#
|
|
if ifconfig ng0 >/dev/null 2>&1; then
|
|
ifconfig ng0 inet down delete >/dev/null 2>&1
|
|
ngctl shutdown ng0:
|
|
else
|
|
ngctl mkpeer iface dummy inet
|
|
fi
|
|
|
|
# Attach a UDP socket to the ``inet'' hook of the interface node
|
|
# using the ng_ksocket(8) node type.
|
|
#
|
|
ngctl mkpeer ng0: ksocket inet inet/dgram/udp
|
|
|
|
# Bind the UDP socket to the local external IP address and port
|
|
#
|
|
ngctl msg ng0:inet bind inet/${LOC_EXTERIOR_IP}:${UDP_TUNNEL_PORT}
|
|
|
|
# Connect the UDP socket to the peer's external IP address and port
|
|
#
|
|
ngctl msg ng0:inet connect inet/${REM_EXTERIOR_IP}:${UDP_TUNNEL_PORT}
|
|
|
|
# Configure the point-to-point interface
|
|
#
|
|
ifconfig ng0 ${LOC_INTERIOR_IP} ${REM_INTERIOR_IP}
|
|
|
|
# Add a route to the peer's interior network via the tunnel
|
|
#
|
|
route add ${REM_INSIDE_NET} ${REM_INTERIOR_IP}
|
|
|