The LanGuardian console port should be configured as described in this document.
When a LanGuardian is powered on, the following message should be printed to the console port. If this doesn't happen, either the machine is dead or the serial connection to your terminal is not correct.
Copyright (C) 1992-1993 by RTMX, Inc. All rights reserved. LG-2 ROM Rev: 09/29/95 PCB Rev: A System Serial #: 77 *** Power-on Self Test: DRAM ........: PASSED FPGA ........: PASSED ETHERNET 0 ........: PASSED ETHERNET 1 ........: PASSED HD64570 ........: PASSED SCSI ........: PASSED FDC765 ........: PASSED RTMX Auto-boot - hit ^C to abort 10 seconds to auto-boot
A LanGuardian has a default boot method stored in the non-volatile storage on the machine (an EEPROM). The machine will attempt to boot from this default after a short (normally 10 second) timeout, during which time the machine may be interrupted by a control-C character presented on the console port.
As one would expect with any reasonably modern machine, there is a
functional monitor program present in the onboard PROM. This monitor
program has a builtin command menu, accessible via the
>> help help Display command help cache [Data][Instruction][None] Set/show cache mode[s] radix [hex/dec] Set/show default input radix size [byte/word/long] Set/show default access size bf [/bwl] <start> <end> <value> Fill memory with pattern bt [/bwl] <start> <end> <value> Test memory for pattern bm [/bwl] <start> <end> <dest> Copy block of memory md [/bwl] <start> [<end>] Dump memory mm [/bwl] <addr> Modify memory rd Show registers rm [<reg>] Modify [one or more] register[s] di <start> [<end>] Disassemble instructions br [/c] [<addr>] Set/Show/Clear breakpoints env [/d] Default/Show/Modify Environment rom_env [/d] Default/Show/Modify Environment probe_scsi Initialize SCSI Subsystem nb [/h] [le0/le1] [<args>] Boot (load/execute) a program via le? bo [/h] [fd0/sd0] [[<]<file>] Boot (load/execute) program from disk sense Show/Modify pseudo Sense Switch diag Run built-in diagnostics clock_off Save time of day battery
The PROM on the LanGuardian has the concept of an environment --
similar to that of a Sun3 or SparcStation, but more limited in scope. The
current contents of the environment can be accessed via the
env command. Note: If you run this command, you must
continue to hit
enter repeatedly, for each line of output.
Or, you can change the value and then hit
>> env DRAM SIMM Size: 4M Ethernet port 0 = 00:C0:87:00:00:9A Ethernet port 1 = 00:C0:87:00:00:9B Auto boot = Y Auto boot timeout = 10 Boot Device = fd0 Boot Spec = Power-on Self Test = Y Secure [Encrypted] Network Load = N Network Boot Mode: TFTP Ethernet Port 0 IP Address = 192.168.215.32 Ethernet Port 0 SERVER Address = 192.168.215.21 Ethernet Port 1 IP Address = 0.0.0.0 Ethernet Port 1 SERVER Address = 0.0.0.0 Configuration File = /tftpboot/lg2.boot Update NVRAM (y/n)? n
env command, one can set the default boot
method to be network. To enable this, one must set the IP address for the
LanGuardian and the server machine that it is boot from in the boot
environment, and then power cycle the machine.
The LanGuardian does NOT use
dhcp to automatically determine its initial IP address while
netbooting. If your security device will believe any answer given to it
over the network, it isn't going to be very secure. (This is why there is
an encrypted network boot mode!)