ZyXEL Communications USG-300 - V2.20 ED 2, Manual

Page: 277 / 1149

Chapter 10 Monitor
ZyWALL USG 300 User’s Guide
277
Spam Mails This is the number of e-mails that the ZyWALL has determined to be
spam.
Spam Mails
Detected by
Black List This is the number of e-mails that matched an entry in the ZyWALL’s anti-
spam black list.
Spam Mails
Detected by
DNSBL The ZyWALL can check the sender and relay IP addresses in an e-mail’s
header against DNS (Domain Name Service)-based spam Black Lists
(DNSBLs). This is the number of e-mails that had a sender or relay IP
address in the header which matched one of the DNSBLs that the ZyWALL
uses.
DSNBL
Timeout This is how many queries that were sent to the ZyWALL’s configured list
of DNSBL domains and did not receive a response in time.
Mail Sessions
Forwarded This is how many e-mail sessions the ZyWALL allowed because they
exceeded the maximum number of e-mail sessions that the anti-spam
feature can check at a time.
You can see the ZyWALL’s threshold of concurrent e-mail sessions in the
Anti-Spam > Status screen.
Use the Anti-Spam > General screen to set whether the ZyWALL
forwards or drops sessions that exceed this threshold.
Mail Sessions
Dropped This is how many e-mail sessions the ZyWALL dropped because they
exceeded the maximum number of e-mail sessions that the anti-spam
feature can check at a time.
You can see the ZyWALL’s threshold of concurrent e-mail sessions in the
Anti-Spam > Status screen.
Use the Anti-Spam > General screen to set whether the ZyWALL
forwards or drops sessions that exceed this threshold.
Top Sender By Use this field to list the top e-mail or IP addresses from which the ZyWALL
has detected the most spam.
Select Sender IP to list the source IP addresses from which the ZyWALL
has detected the most spam.
Select Sender Email Address to list the top e-mail addresses from
which the ZyWALL has detected the most spam.
# This field displays the entry’s rank in the list of the top entries.
Sender IP This column displays when you display the entries by Sender IP . It shows
the source IP address of spam e-mails that the ZyWALL has detected.
Sender Mail
Address This column displays when you display the entries by Sender Mail
Address . This column displays the e-mail addresses from which the
ZyWALL has detected the most spam.
Occurrence This field displays how many spam e-mails the ZyWALL detected from the
sender.
Table 51 Monitor > Anti-X Statistics > Anti-Spam (continued)
LABEL DESCRIPTION