VoIP gateway IP400 version 5.01
Page 39
This configuration means that by plugging in an ISDN BRI point-to-multipoint
exchange connection (e.g. a BRI connection to the exchange or a BRI line from a
PBX) to the
PPP
interface, the gateway can be configured from any PC with a PPP
dial up application.
Of course, this configuration can be adapted to the local circumstances. Refer
here to the instructions in section 4.2.3 “Settings for incoming ISDN PPP dial-up
connections” from page 33.
4.2.8 Allowing dial-up access to the entire network
For IP packets which have to be routed from Ethernet to logical PPP interfaces via
the gateway, to the local network, the gateway appears as if it were itself the
addressed terminal equipment. This allows IP terminal equipment on the same
Ethernet segment, which does not have a correct routing entry, to also commu-
nicate beyond the gateway and make use of the WAN connection. This function
referred to as
proxy arp
is activated by ticking the
Do proxy-ARP
checkbox in
the
Ethernet Interface
area of the configuration applet.
For this purpose, the remote entity, connected via ISDN, has to be assigned an IP
address from the same subnet as the gateway. This is done by making an appro-
priate entry in the
Remote IP address
area and ticking the
Assign remote IP
address
checkbox.
Note however, that this makes your entire network accessible to the dialling-up
party, which could be a security problem, under certain circumstances.