Traffic logging and firewall alert messages, Time and ntp – Allied Telesis AR400 Series Router User Manual

Page 37

Getting Started with the Graphical User Interface (GUI)

Software Release 2.5.2
C613-02034-00 REV A

Traffic Logging and Firewall Alert Messages

Problem

Firewall Alert messages are not being emailed.

Solution

■

Check that Enable Email Firewall Alerts is checked (Configuration >
Firewall > Events > Alarms tab) and that the email address is correct.

■

Check that the DNS Server IP is correct (Configuration > Internet Protocol
> General).

■

Check that a hostname is correctly specified (Configuration > System >
General).

■

Make sure that the mail server has an account set up for the router.

Problem

You are not receiving email notifications of all attacks that the firewall
intercepts.

Solution

Your alarm thresholds may be set too high (Configuration > Firewall > Events
> Alarms tab). Be careful when reducing the thresholds, because if the
threshold is too low, your mail service may be flooded.

Problem

You are receiving email notifications for “attacks” that actually are not
attacks.

Solution

Your alarm thresholds may be set too low (Configuration > Firewall > Events >
Alarms tab). Be careful when increasing the thresholds, because if the threshold
is too high, you may not be warned about actual attack attempts.

Problem

The time in log packets is incorrect.

Solution

See “Time and NTP” on page 37.

Time and NTP

Diagnosis

The router’s time is displayed on the Configuration > System > Time tab. It will
also be included in log packets.

Problem

The router’s time does not change, even though you entered the correct time.

Solution

Changing the time is a 3-step process. Select Configuration > System > Time
tab. First, enter a time that is very shortly in the future (e.g. 20 seconds later
than the current time). Then check Set time. Then wait until precisely the time
you have entered, and click Apply.

Problem

The router is not assigning the time to devices on the LAN.

Solutions

■

Check NTP is enabled (Configuration > System > Time tab).

■

Check that the NTP peer’s IP address is entered correctly.