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Appendix E – Recovering From a Failed Upgrade
241
Appendix E – Recovering From a
Failed Upgrade
If the
Heart beat
(or
H/B)
LED is not flashing 20 – 30 seconds after power is supplied, the
CyberGuard SG unit is unable to boot correctly.
This is usually because the firmware
inside the CyberGuard SG unit has been written incorrectly or incompletely, or in rare
cases it may have become corrupted.
In this situation, a
recovery boot
will reprogram the CyberGuard SG to bring it back to a
usable state.
This can be done using the Netflash executable if you are running
Windows, otherwise you will have to set up a BOOTP (DHCP) server.
Both procedures are outlined below.
Note
A Netflash that contains the firmware that shipped with your unit is located in the
\firmware
directory on the SG CD.
A Netflash containing the latest firmware for your SG
unit can be obtained from SG customer support.
Always attempt a recovery boot before requesting an RMA from customer support.
Recovery using Netflash
The following details the steps required to perform a recovery boot using the Netflash
program on a Windows PC.
Attach the CyberGuard SG unit's LAN port or switch directly to your PC using a crossover
cable.
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Appendix E – Recovering From a Failed Upgrade
242
Note
If you are using an older LITE(2)/LITE(2)+, you may have to attach the unit's WAN port
directly to your PC using a crossover cable for the first stage of the recovery procedure.
The Netflash program will prompt you to switch the cable to the LAN port/switch using a
straight through for the second stage of the recovery procedure.
Log in to your PC with administrator privileges (2000/XP/NT4 only).
Ensure there are no DHCP server programs or services (
Start
->
Run
->
Open:
services.msc
) running on your PC.
Disable the inbuilt Windows firewall (
Control Panel
->
Windows Firewall
), and any third
party firewall or antivirus software.
Hold in the
Reset
/
Erase
button while applying power, keep it held in for 3 seconds.
Double click on Netflash to launch it.
Click
Recover
and select
Network Recovery
.
Click
Recover Device
.
Enter an address in the same network range as your PC and click OK
Note
If the recovery procedure fails at or after
Assigning IP address..
, but the
Heart Beat
/
H/B
light is flashing, the unit may have become uncontactable due to bad configuration.
If this
is the case, hit the
Reset
/
Erase
button twice within 2 seconds to restore factory default
configuration, power off the unit and restart the recovery procedure from the beginning.
If prompted, select your CyberGuard SG unit from the list displayed.
Enter your CyberGuard SG unit's password and click OK.
If prompted, enter your CyberGuard SG unit's web administration port.
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Appendix E – Recovering From a Failed Upgrade
243
Wait for the recovery procedure to complete and the CyberGuard SG unit to finish
reprogramming.
Note
It will take a few minutes for your CyberGuard SG to finish reprogramming.
After it has
finished it will reboot automatically with its old configuration intact.
If it is uncontactable
after rebooting, hit the Reset/Erase button twice within 2 seconds to restore factory
default configuration, then follow the instructions in the chapter entitled
Getting Started
to
begin reconfiguration of your unit.
Recovery using a BOOTP server
The following is a brief guide to performing a recovery boot when you are unable to
access either Netflash or a Windows PC on which to run it.
More comprehensive
instructions are not given, as they will vary depending on your operating system and
server software packages.
The recovery procedure involves network booting the unit using a BOOTP server with
access to a CyberGuard SG firmware image file, then upgrading the network as per a
normal flash upgrade to reprogram its flash to a usable state.
Note
To perform the recovery boot, you must have a firmware image for your CyberGuard SG
unit. The firmware that shipped with your unit is located in the
\firmware
directory on the
SG CD.
The latest firmware for your SG unit can be obtained from SG customer support
Firmware files have the format
Model_Version_Date.sgu
or
Model_Version_Date_*.bin
.
Log in to your PC with sufficient permissions to edit the server configuration files, and
stop and start the servers.
Place the firmware file in your BOOTP server’s path, e.g.:
/tftpboot/
Edit your BOOTP server configuration to contain an entry for the CyberGuard SG unit.
Specify the firmware file as the file to boot, e.g.:
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Appendix E – Recovering From a Failed Upgrade
244
filename "SG300_v2.1.3_20041213.sgu";
(Re)start the BOOTP server.
Attach the CyberGuard SG unit's LAN port or switch directly to your PC using a crossover
cable.
Note
If you are using an older LITE(2)/LITE(2)+, you may have to attach the unit's WAN port
directly to your PC using a crossover cable for the first stage of the recovery procedure
Accordingly, your BOOTP server will require an entry specifying the CyberGuard SG
unit’s WAN port MAC address.
Hold in the
Reset
/
Erase
button while applying power, keep it held in for 3 seconds.
After 20 – 30 seconds, the CyberGuard SG unit will load the file from the DHCP/BOOTP
server and the
Heart Beat
/
H/B
light will begin flashing.
Browse or telnet/ssh to your CyberGuard SG unit and perform a flash upgrade as per
usual to reprogram its flash.
Note
If the CyberGuard SG unit is uncontactable, but the
Heart Beat
/
H/B
light is flashing, it
may be due to bad configuration.
If this is the case, hit the
Reset
/
Erase
button twice
within 2 seconds to restore factory default configuration, and perform the network boot
again.

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