Configuration Library
Configuration Library

ScreenOS Configure Logging to USB Device

[ Edited ]
‎11-27-2010 11:19 AM

Product: ScreenOS
Version: 4.0 and higher

Network Topology:
Not Applicable

 The built in flash on the firewalls have limited storage for log files.  These are automatically over written as space runs out on the device.  Adding a USB drive stick can increase the amount of log space available on the firewall.

1. Confirm that usb has the logging levels turned on.  Log into the cli and check the current setting.  This should be the default.

systemname-> get log setting
Levels: 0=Emergency, 1=Alert, 2=Critical, 3=Error, 4=Warning, 5=Notification,
        6=Information, 7=Debugging, '-' = disabled
Module     Console    Internal   Email      SNMP       Syslog     
system     --------   01234567   012--5--   012-----   01234567   

Module     WebTrends  NSM        USB     
system     012--5--   01234567   01234567   

Serial number is disabled.

You should see the logging level under USB at 7 and below.  If this is not turned on you can set the USB logging level.

systemname-> set log module system level information destination usb

Other levels available are:

2. Enable the logging to the USB device.

systemname-> set log usb enable

This allows the usb stick to be used to the maximum available space.  It creates a text file on the drive in the format:


3. To restrict the size of the log file.

systemname-> set log usb filesize ## (number of megabytes)
Viewing the logs
These logs are visible in the web and cli interface while they are gathered.  To remove the device for review on you computer.

get log traffic ?
View and select your options


get log event ?

View and select your options

Reports - System Log - Events
Reports - Policies (select policy log to view)

USB Drive on your Computer
To remove the USB drive and mount on your computer for review.

systemname-> unset log usb enable
systemname-> exec usb-device stop  

KB4258 Storing Log Data

KB4214 Configuring the Juniper Firewall Traffic Log (Policy Log)

Steve Puluka BSEET - Juniper Ambassador
IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP)
Configuration Library

Re: ScreenOS Configure Logging to USB Device

‎06-05-2012 06:14 AM

I do have a syslog server setup already, so this will actually be a breeze. Many thanks folks.


Configuration Library

HIRe: ScreenOS Configure Logging to USB Device

[ Edited ]
‎12-18-2012 09:43 PM



can you guide me to send the log (/var/log) files to USB drive automatically in Junos platform please?

Configuration Library

Re: HIRe: ScreenOS Configure Logging to USB Device

‎12-22-2012 05:21 AM

Unfortunately, you cannot redirect the log location in Junos.  The best you can do is copy them off the device to usb.  See kb 16240


Copy logs to usb


Logging setup on SRX

Steve Puluka BSEET - Juniper Ambassador
IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP)