Posts tagged tutorial

Două articole utile

2 years ago

Adobe AIR 1.5 Cookbook
Solutions and Examples for Rich Internet Application Developers
http://www.oreilly.com/catalog/9780596522506/
By David Tucker, Marco Casario, Koen De Weggheleire, Rich Tretola
First Edition: November 2008
ISBN: 9780596522506
Pages: 446
Print: $44.99 / Ebook: $31.99 / Print+Ebook: $58.49 USD

The hands-on recipes in this cookbook help you solve a variety of tasks and
scenarios often encountered when using Adobe AIR to build Rich Internet
Applications for the desktop. Thoroughly vetted by Adobe’s AIR development team,
Adobe AIR 1.5 Cookbook addresses fundamentals, best practices, and more. If you
want to learn the nuances of Adobe AIR to build innovative applications, this is
the book you’ve been waiting for.

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

Learning Rails
http://www.oreilly.com/catalog/9780596518776/

By Simon St. Laurent, Edd Dumbill
First Edition: November 2008
ISBN: 9780596518776
Pages: 442

Print: $34.99 / Ebook: $27.99 / Print+Ebook: $45.49 USD

Most Rails books are written for programmers looking for information on data
structures. Learning Rails targets web developers whose programming experience is
tied directly to the Web. Rather than begin with the inner layers of a Rails web
application — the models and controllers — this unique book approaches Rails
development from the outer layer: the application interface. You can start from
the foundations of web design you already know, and then move more deeply into
Ruby, objects, and database structures.

tehnice tutorial

Unelte antispam eficiente: DCC

3 years ago

by gupi

Distributed Checksum Clearinghouses (DCC) este un filtru antispam foarte eficient, bazat pe sume de control calculate pentru mesajele recunoscute drept spam. Sumele de control sunt publice şi implementarea sistemului este foarte simplă.

…
The idea of the DCC is that if mail recipients could compare the mail they receive, they could recognize unsolicited bulk mail. A DCC server totals reports of checksums of messages from clients and answers queries about the total counts for checksums of mail messages. A DCC client reports the checksums for a mail message to a server and is told the total number of recipients of mail with each checksum. If one of the totals is higher than a threshold set by the client and according to local whitelists the message is unsolicited, the DCC client can log, discard, or reject the message

DCC este foarte util ca şi ca filtru adiţional la Spamassassin.

Pentru a instala DCC, paşii sunt în mare aceştia (server Linux, Spamassassin instalat):

Asiguraţi-vă că portul UDP 6277 este deschis spre ieşire (outbond UDP 6277);
eu folosesc un firewall excelent, denumit csf, pentru care setarea se face în fişierul /etc/csf/csf.conf

nano -w /etc/csf/csf.conf

verificaţi setarea UDP_OUT:

# Allow outgoing UDP ports # To allow outgoing traceroute add 33434:33523 to this list UDP_OUT = "20,21,53,113,123,873,953,6277"

şi restartaţi firewall-ul:

csf -r
descărcaţi si instalati DCC:

cd ~ rm -f dcc.tar.Z wget http://www.rhyolite.com/anti-spam/dcc/source/dcc-dccd.tar.Z tar -zxvf dcc-dccd.tar.Z cd dcc-dccd-1.3.2 ./configure make make install
Modificaţi DCC pentru a rula ca demon

nano -w /etc/dcc/dcc_conf

asigurati-va ca DCCD_ENABLE este off si DCCIFD_ENABLE este on.

DCCD_ENABLE=off DCCIFD_ENABLE=on

Pregatiti script-ul de start a serviciului

cd /etc/rc.d/init.d ln -s /var/dcc/libexec/rcDCC DCC chkconfig --add DCC /etc/rc.d/init.d/DCC start

si mai puneti un link spre un program zilnic de curatenie

cd /etc/cron.daily ln -s /var/dcc/libexec/cron-dccd
Activati modulul in Spamassassin

nano -w /etc/mail/spamassassin/local.cf

si adaugati liniile

# DCC home folder # comment it to disable dcc_home /var/dcc

respectiv

nano -w /etc/mail/spamassassin/v310.pre

si de-comentati (stergeti semnaul # de la inceputul liniei) linia ce activeaza DCC

loadplugin Mail::SpamAssassin::Plugin::DCC