SnapGear VPN Router User Manual page 21

Using an existing local DHCP or BOOTP server
If your local network is configured with a DHCP server then the SnapGear VPN Router will
automatically acquire an address when it is attached to the network. You may need to consult your
local DHCP server logs to find what address was assigned to the SnapGear VPN Router.
If you are unable to access your local DHCP server logs, you can find which address was assigned
to your SnapGear VPN Router by issuing the following commands from a command prompt. These
commands will work on both Windows and Linux operating systems.
1. ping <subnet broadcast address>
2. arp –a
Examine the output of the 'arp' command and locate the MAC address of your SnapGear VPN
Router and the corresponding Internet Address. You can find the MAC address printed on the
underside of your SnapGear VPN Router.
If your network has a BOOTP server then you can use this to set up the SnapGear VPN Router. Edit
the BOOTP server's file, /etc/bootptab, and enter an entry for the SnapGear VPN Router. Use the
Ethernet MAC address printed on a label on the bottom of the SnapGear VPN Router. Restart
bootpd if it is running and connect the SnapGear VPN Router to the local network.
The SnapGear VPN Router will accept gateway and DNS server tags from DHCP or BOOTP, and
set up the SnapGear VPN Router's routing tables appropriately.
Configuring a new local DHCP or BOOTP server
If your network currently has no DHCP or BOOTP server then you may choose to temporarily
configure a local Linux system to be a bootp server. To do this:
1. Edit the /etc/inetd.conf file.
•
Search for the bootpd line. Most distributions ship with this disabled (that is, commented
out with a "#" in front). Remove the "#" from the start of this line.
•
Save and exit the file.
2. Edit /etc/bootptab file:
•
Add a new line at the bottom that reads:
Getting Started
17