Golfreeze.packetlove.com: Life style of Golfreeze Canon400D Family kammtan.com Jazz Freebsd Unix Linux System Admin guitar Music

pop00:/home/golf/___script___# telnet localhost 110
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
+OK Hello there.
user golfs@example.com
+OK Password required.
pass PASSGU
+OK logged in.
LIST
+OK POP3 clients that break here, they violate STD53.
1 1326
2 467
.
RETR 1
+OK 1326 octets follow.
Return-Path: < postmaster@example.com>;
Delivered-To: golfs@example.com
Received: from ldap00.xx.com (ldap00.th.xx.com [10.17.200.22])
by pop00.xx.com (Postfix) with ESMTP id D4B374C8069
for < golfs@example.com>;; Tue, 10 Nov 2009 17:57:00 +0700 (ICT)
Received: from ldap00.xx.com (localhost [127.0.0.1])
by ldap00.xx.com (Postfix) with ESMTP id F14376DF824
for < golfs@example.com>;; Tue, 10 Nov 2009 17:57:00 +0700 (ICT)
Received: (from www@localhost)
by ldap00.xx.com (8.14.3/8.14.3/Submit) id nAAAv0NL085397;
Tue, 10 Nov 2009 17:57:00 +0700 (ICT)
(envelope-from postmaster@example.com)
Date: Tue, 10 Nov 2009 17:57:00 +0700 (ICT)
X-Authentication-Warning: ldap00.xx.com: www set sender to postmaster@example.com using -f
To: golfs@example.com
Subject: Welcome to xx mail service
Message-ID: < 1257850620883_36a8e9eb903b074f4fa6ca13c8395ab9@116.68.150.233>;
X-Mailer: Phamm
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: < postmaster@xx.com>;


Welcome to ddd service!
-----------------------------------------------

Dear users,

Thank you for using ddd service.

Please kindly consider change your password periodically for your security.



.
quit
+OK Bye-bye.

###setting dns load balance by round robin

Balancing Mail

The normal method of handling mail fail-over is using the 'preference' value which is
described in this note. However, using the MX record you can balance mail in two ways.

1. Define multiple MX records with the same priority e.g.

; zone file fragment
IN MX 10 mail.example.com.
IN MX 10 mail1.example.com.
IN MX 10 mail2.example.com.
....
mail IN A 192.168.0.4
mail1 IN A 192.168.0.5
mail2 IN A 192.168.0.6

The name server will deliver the MX records in the order defined by the rrset-order and the
receiving SMTP software will select one based on its algorithm. In some cases the SMTP alogithm may
work against the definition of the rrset-order statement. Current versions of sendmail (8.13.x),
Exim (4.44) and Postfix (2.1 or 2.2) all have definitive references to indicate they randomly select
equal preference servers (Postfix allows control of the behaviour with the smtp_randomize_addresses
parameter) and consequentially may use an address which the rrset-order has carefully tried to
change! qmail, courier-mta and Microsoft (Exchange and IIS SMTP) documentation does not appear to
have definitive references to indicate how they handle this case.
2. The alternate approach is to define multiple A records with the same name and multiple IP
addresses.

; zone file fragment
IN MX 10 mail.example.com.
....
mail IN A 192.168.0.4
IN A 192.168.0.5
IN A 192.168.0.6

In this case the load-balancing effect is under the control of BIND and the rrset-order
record. In order to avoid problems if the receiving mail system does reverse look-up as a spam check
then the PTR records for 192.168.0.4, 192.168.0.5, 192.168.0.6 above must all define to
mail.example.com.

In all the above cases each mail server must be capable of handling and synchronising the load for
all the mail boxes served by the domain, using some appropriate back-end to do this or by defining
all but one server to be a relay or forwarder.

Balancing Other Services

Assuming you want to load share your ftp or web services then you simply define multiple A records
with the same name and different IPs as in the example below.

; zone file fragment

ftp IN A 192.168.0.4
ftp IN A 192.168.0.5
ftp IN A 192.168.0.6
www IN A 192.168.0.7
www IN A 192.168.0.8

; or use this format which gives exactly the same result
ftp IN A 192.168.0.4
IN A 192.168.0.5
IN A 192.168.0.6
www IN A 192.168.0.7
IN A 192.168.0.8

The DNS will deliver all the IP addresses defined, the first IP address in the list will be in a
default round robin (controlled by the rrset-order 'named.conf' statement). The FTP and WEB
servers must all be exact replicas of each other in this scenario.

ถ้าต้องการให้ account ใน example.com ส่งเข้าได้เฉพาะ domain

example.com
hotmail.com

ก็เพิ่มในไฟล์ local_domains เป็น
example.com OK
hotmail.com OK

postmap /etc/postfix/local_domains
/etc/init.d/postfix restart

### อ่านเพิ่มเติมได้ที่

http://www.postfix.org/RESTRICTION_CLASS_README.html#external

###System admin should know
    http://www.cyberciti.biz/tips/linux-unix-bsd-openssh-server-best-practices.html
    http://www.cyberciti.biz/tips/my-10-unix-command-line-mistakes.html
    http://www.cyberciti.biz/tips/top-linux-monitoring-tools.html
    http://www.cyberciti.biz/tips/download-email-client-for-linux-mac-osx-windows.html
    http://www.cyberciti.biz/faq/top5-linux-video-editing-system-software/

W: There is no public key available for the following key IDs:
4D270D06F42584E6
E: Dynamic MMap ran out of room
E: Error occurred while processing wesnoth-all (NewVersion1)
E: Problem with MergeList
/var/lib/apt/lists/ftp.coe.psu.ac.th_debian_dists_stable_main_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.

แก้โดย :

# gpg --keyserver pgpkeys.mit.edu --recv-key 4D270D06F42584E6

# gpg -a --export 4D270D06F42584E6 | sudo apt-key add -

สำหรับสาวก Postfix ครับ

วันนี้มี tools สำหรับเช๊ค email stat traffic มาฝากกันครับ ซึ่งผมได้ลองใช้มาสักพักใหญ่ๆ รู้สึกชอบ
อิอิ

ตัว stat traffic ตัวนี้จะเอา log ของ mail log มาทำการวิเคราะห์นะครับ ซึ่งจะมีปริมาณ การรับ การส่ง
เมลในแต่ละวัน ซึ่งเป็นเมลที่ drop reject หรือ ban ก็ดูได้หมดครับ หรือจะดูเป็น stat ย้อนหลังก็ได้

#freebsd
Packetlove# make search name="pflogsumm"
Port: pflogsumm-1.1.2,1
Path: /usr/ports/mail/pflogsumm
Info: Postfix Log Entry Summarizer
Maint: flo@kasimir.com
B-deps: perl-5.8.9_3
R-deps: p5-Bit-Vector-7.1 p5-Carp-Clan-6.04 p5-Date-Calc-6.3 perl-5.8.9_3
WWW: http://jimsun.LinxNet.com/postfix_contrib.html

install โดย
#cd /usr/ports/mail/pflogsumm
#make install clean

crontab รันโดย
#crontab -e

45 11 * * * /usr/local/bin/pflogsumm -d today /var/log/maillog | /usr/bin/mailx -s "`uname -n` daily mail stats" receiver@email.com

=========================================

##Debian

#apt-get install pflogsumm

แล้วก็รันใน crontab ดังนี้ครับ

#crontab -e
45 11 * * * /usr/sbin/pflogsumm -d today /var/log/mail.log | /usr/bin/mailx -s "`uname -n` daily mail stats" receiver@email.com

โดยที่ receiver@email.com คือ emailปลายทางที่จะให้ระบบgen stat ส่งไปนะครับ

ยังไงก็ลองใช้กันดูนะครับ อิอิ

#on debian
bonnie++ -d /path_check -s 8192 -r 2048 -n 512 -u 0:0