The BPQ32 IP Gateway feature provides two distinct functions:
A MAC level bridge, linking systems using IP over ax.25 with those using IP ovew Ethernet.
Headers are converted between ax.25 and Ethernet, and ARP frames are reformatted and monitored to build
a simple routing table. Some Applications may not use ARP (eg MSYS is configured with an ax.25 default route,
rather than an IP one), so a default route can also be configured.
The software is intended as an Ethernet gateway for legacy apps, rather than a full function ip over ax.25 router, but can link ip over ax.25 systems.
The suggested config is to use your Internet Ethernet Adapter, which will normally be behind a NAT/PAT Router. The ax.25 applications will appear as single addresses on the Ethernet LAN
A TCP Port Mapper, which allows applications which only support IP addresses (such as WFBB) to use host names.
The software uses the WINPCAP library, obtainable from www.winpcap.org.
The Configuration is supplied in bpq32.cfg.
The following Configuration Parameters are required:
ADAPTER is the ethernet adapter device name. Under XP. and possibly others. this is an encoded UID, which
can be obtained by running the supplied program "bpqadapters". This will list all installed
adapters with their real and "friendly" names, You can cut and paste the required value.
IPADDR is the IP address of the BPQ32 switch on your LAN. This should be an unused address
(NOT the IP address of the PC).
IPBROADCAST is the broadcast Address for your LAN
IPGATEWAY The default IP route. Normally your Internet Router.
IPPORTS The BPQ Ports to be used for links to IP systems. List of ports, separated by commas
MAP Port Mapping Definitions. Format is MAP IPADDR PORT HOSTNAME REMPORT. Connections from IPADDR to PORT are
redirected to port NEWPORT on HOSTNAME.
IPGATEWAY
Adapter \Device\NPF_{ECDB1154-982B-48D3-A394-785AC42588E3}
IPAddr 192.168.0.129 # IP address of the BPQ32 switch on your LAN
IPBroadcast 192.168.0.255 # The broadcast Address for your LAN
IPGateway 192.168.0.1 # Default IP route. Normally your Internet Router
IPPorts 1,3,7 # BPQ Ports to be used for links to IP systems. List of ports, separated by commas
# Port Mapping. Enables Software that only supports IP addresses to use Host Names
MAP 192.168.0.101 10001 g8bpq.dyndns.org 6300
MAP 192.168.0.101 10003 g8bpq.dyndns.org 23
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John Wiseman G8BPQ
October 2010