Zyxel ZyWALL USG 50 [5/185] Zywall usg support notes

Zyxel ZyWALL USG 50 [5/185] Zywall usg support notes
ZyWALL USG Support Notes
5
All contents copyright (c) 2010 ZyXEL Communications Corporation.
J08. How to get a detailed description of an IDP signature? .............................. 163
J09. After an IDP signature updated, does it require ZyWALL to reboot to make
new signatures take effect? ................................................................................. 163
CONTENT FILTER FAQ............................................................................................. 165
K01. Why can‟t I enable external web filtering service? Why does the external
web filtering service seem not to be working? ................................................... 165
K02. Why can‟t I use MSN after I enabled content filter and allowed trusted
websites only? ..................................................................................................... 165
L. DEVICE HA FAQ ................................................................................................. 166
L01. What does the “Preempt” mean? ................................................................ 166
L02. What is the password in Synchronization? ................................................. 166
L03. What is “Link Monitor” and how to enable it? .......................................... 166
L04. Can Link Monitor of Device HA be used in backup VRRP interfaces? .... 166
L05. Why do both the VRRP interfaces of master ZW USG and backup ZW USG
are activated at the same time? ........................................................................... 167
M. USER MANAGEMENT FAQ ................................................................................. 168
M01. What is the difference between user and guest account? .......................... 168
M02. What is the “re-authentication time” and “lease time”? ............................ 168
M03. Why can‟t I sign in to the device? ............................................................. 168
M04. Why is the TELNET/SSH/FTP session to the device disconnected? Why is
the GUI redirected to login page after I click a button/link? .............................. 168
M05. What is AAA? ........................................................................................... 168
M06. What are ldap-users and radius-users used for? ........................................ 169
M07. What privileges will be given for ldap-users and radius-users? ................ 169
N. CENTRALIZED LOG FAQ ..................................................................................... 171
N01. Why can‟t I enable e-mail server in system log settings? .......................... 171
N02. After I have the entire required field filled, why can‟t I receive the log mail?
............................................................................................................................. 171
O. TRAFFIC STATISTICS FAQ ................................................................................... 172
O01. When I use "Flush Data" in Report, not all the statistic data are cleared. . 172
O02. Why isn't the statistic data of "Report" exact? ........................................... 172
O03. Does Report collect the traffic from/to ZyWALL itself? ........................... 172
O04. Why cannot I see the connections from/to ZyWALL itself? ...................... 172
P. ANTI-VIRUS FAQ................................................................................................. 172
P01. Is there any file size or amount of concurrent files limitation with ZyWALL
USG Anti-Virus engine? ..................................................................................... 172
P02. Does ZyWALL USG Anti-Virus support compressed file scanning? ......... 173
P03. What is the maximum concurrent session of ZyWALL USG Anti-Virus
engine? ................................................................................................................ 173
P04. How many type of viruses can be recognized by the ZyWALL USG? ...... 173
P05. How frequent the AV signature will be updated? ....................................... 173
P06. How to retrieve the virus information in detail? ......................................... 173
P07. I cannot download a file from Internet through ZyWALL USG because the
Anti-Virus engine considers this file has been infected by the virus; however, I

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