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Pop3 – D-Link DFL-2500 User Manual

Page 151

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gw-world:/> dnsbl

DNSBL Contexts:

Name

Status

Spam

Drop

Accept

------------------------

-------- -------- -------- --------

my_smtp_alg

active

156

65

34299

alt_smtp_alg

inactive

0

0

0

The -show option provides a summary of the SPAM filtering operation of a specific ALG.

gw-world:/> dnsbl my_smtp_alg -show

DNSBL used by ALG my_smtp_alg
Drop Threshold

: 20

Spam Threshold

: 10

Append TXT records

: yes

IP Cache maximum size : 10
IP Cache current size : 5
IP Cache timeout

: 600

Configured BlackLists : 4
Disabled BlackLists

: 0

Current Sessions

: 3

Statistics:
Total number of mails checked : 34520
Number of mails dropped

: 65

Number of mails spam tagged

: 156

Number of mails accepted

: 34299

BlackList

Status

Value

Total

Matches

-------------------------------- -------- ------

-------

-------

server.spamcenter.org

active

25

34520

221

node1.spamlister.org

active

20

34520

65

To clean out the dnsbl cache for the my_smtp_alg and to reset all statistical counters for it, use the
command option:

gw-world:/> dnsbl my_smtp_alg -clean

Note

The above DNSBL server URLs are fictitious and are only for illustration. A DNSBL
listing can be found at http://en.wikipedia.org/wiki/Comparison_of_DNS_blacklists.

6.2.6. POP3

POP3 is a mail transfer protocol that differs from SMTP in that the transfer of mail is directly from a
server to a user's client software.

POP3 ALG Options

Key features of the POP3 ALG are:

Block Clear Text Authentication

Block connections between client and server that send the
username/password combination as clear text which can be
easily read (some servers may not support other methods than
this).

6.2.6. POP3

Chapter 6. Security Mechanisms

151