The channel. Many brands do sports sponsoring advertisement, because the audience is fixed purpose to watch the appeal is concentrated. If in the splendid and intense tennis open or NBA game spot among an AD, the effect often good. Because of the fans won’t because don’t like to watch ads and lead to miss games live.

Professional also reflect in the advertisement design. Advertising should be and the product itself characteristics consistent with, should build can reflect the connotation of the brand culture atmosphere, or graceful and restrained, or noble, or tactful, or straightforward. I think keller did well leading this advertisement. It put the leading to the table a put, meaning you can build a house deserve I the tap. Generally speaking, we are the first to buy a house, and then choose to decorate material, and see if you can deserve. The somebody else now take out leading to, see you made the house can be good enough for my the tap. Shot out of the ordinary, very energetic.

Specialized in marketing is also manifest in various ways of marketing, and more colorful. You don’t think with a marketing method can achieve the effect of attracting customers. Must through the other way, giving the brand unique connotation. Also, the light is not marketing. Because marketing itself is very concise in the spread of, have no way to transfer a lot of things, but “also cannot use too costly language to express. In fact, for many times, language expression, like a man wearing a bloated, although was covered with famous brand, but it. In fact, a brand to rely on its own quality and of years of culture and fashion atmosphere. You have found, every quality good things, most of the color are relatively simple but elegant, are not very loud. The so-called naked inside collect is this feeling. Also is the good brand logo. Guanghua and inside collect is that we want to build one kind of culture atmosphere. But, this is not a cultural atmosphere in formation. I have mentioned, foster a brand like plant trees. Louis Vuitton outlet It takes ten years grow trees, will take time. Build up the brand, too, must the formation brand value. If not spent 10 years, 20 years of work, the brand may fall in. But as long as you hold to 10 years to 2 D years of words, will tell commonly, it has the value, then even if fall, also have no relation, can also be changed forever. Come frome: http://www.louisvuitton-canada.ca

Version 1.0
Author: Falko Timme <ft [at] falkotimme [dot] com>
Last edited 03/08/2007

This article shows how to integrate amavisd-new into a Postfix mail server for spam- and virus-scanning.

amavisd-new is a high-performance interface between MTAs such as Postfix and content checkers: virus scanners, and/or SpamAssassin. We will use ClamAV for virus scanning and SpamAssassin for spam scanning in this tutorial.

I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take. I do not issue any guarantee that this will work for you!

1 Preliminary Note

In this tutorial I will describe how to install/configure amavisd-new on Debian Etch/Ubuntu 6.10 Edgy Eft (the steps are identical for both distributions) and on Debian Sarge. The amavisd-new configuration is suitable for systems where system users are used for email accounts; if you use virtual users, a few modifications to the amavisd-new configuration might or might not be required (but that depends on the actual setup). If you use virtual email users, take a look at these two tutorials:

• Virtual Users And Domains With Postfix, Courier And MySQL (Fedora Core 5)
• Virtual Users And Domains With Postfix, Courier And MySQL (Debian Sarge)

amavisd-new works like this: Postfix receives an email on port 25, passes it to amavisd-new on port 10024 which then invokes ClamAV and SpamAssassin, and afterwards amavisd-new re-injects the mail into Postfix on port 10025 which then finally delivers the mail (if it’s clean). Here’s a small layout of the process:

                                      [SpamAssassin]
                                            ^
                                            |
Email –> [(Port 25) Postfix] –> [(10024) amavisd-new] –> [(10025) Postfix] –> Mailbox
                                            |
                                            v
                                         [ClamAV]

I assume that Postfix and your email accounts are already set up and working as I don’t cover Postfix installation/configuration here.

All steps in this tutorial are done as root, so make sure you’re logged in as root.

2 Debian Etch/Ubuntu 6.10 Edgy Eft

First we install amavisd-new, SpamAssassin, and ClamAV together with a few other programs (mainly programs that amavisd-new needs to unpack archives, because emails can contain archives as attachments):

apt-get install amavisd-new spamassassin clamav clamav-daemon zoo unzip bzip2 unzoo libnet-ph-perl libnet-snpp-perl libnet-telnet-perl nomarch lzop

Afterwards we must configure amavisd-new. The configuration is split up in various files which reside in the /etc/amavis/conf.d directory. Take a look at each of them to become familiar with the configuration. Most settings are fine, however we must modify two files:

First we must enable ClamAV and SpamAssassin in /etc/amavis/conf.d/15-content_filter_mode by uncommenting the @bypass_virus_checks_maps and the @bypass_spam_checks_maps lines:

vi /etc/amavis/conf.d/15-content_filter_mode

The file should look like this:

use strict;

# You can modify this file to re-enable SPAM checking through spamassassin
# and to re-enable antivirus checking.

#
# Default antivirus checking mode
# Uncomment the two lines below to enable it back
#

@bypass_virus_checks_maps = (
   \%bypass_virus_checks, \@bypass_virus_checks_acl, \$bypass_virus_checks_re);

#
# Default SPAM checking mode
# Uncomment the two lines below to enable it back
#

@bypass_spam_checks_maps = (
   \%bypass_spam_checks, \@bypass_spam_checks_acl, \$bypass_spam_checks_re);

1;  # insure a defined return

And then you should take a look at the spam settings and the actions for spam-/virus-mails in /etc/amavis/conf.d/20-debian_defaults. There’s no need to change anything if the default settings are ok for you. The file contains many explanations so there’s no need to explain the settings here:

vi /etc/amavis/conf.d/20-debian_defaults

$QUARANTINEDIR = "$MYHOME/virusmails";

$log_recip_templ = undef;    # disable by-recipient level-0 log entries
$DO_SYSLOG = 1;              # log via syslogd (preferred)
$syslog_ident = 'amavis';    # syslog ident tag, prepended to all messages
$syslog_facility = 'mail';
$syslog_priority = 'debug';  # switch to info to drop debug output, etc

$enable_db = 1;              # enable use of BerkeleyDB/libdb (SNMP and nanny)
$enable_global_cache = 1;    # enable use of libdb-based cache if $enable_db=1

$inet_socket_port = 10024;   # default listenting socket

$sa_spam_subject_tag = '***SPAM*** ';
$sa_tag_level_deflt  = 2.0;  # add spam info headers if at, or above that level
$sa_tag2_level_deflt = 6.31; # add 'spam detected' headers at that level
$sa_kill_level_deflt = 6.31; # triggers spam evasive actions
$sa_dsn_cutoff_level = 10;   # spam level beyond which a DSN is not sent

$sa_mail_body_size_limit = 200*1024; # don't waste time on SA if mail is larger
$sa_local_tests_only = 0;    # only tests which do not require internet access?

[...]
$final_virus_destiny      = D_DISCARD;  # (data not lost, see virus quarantine)
$final_banned_destiny     = D_BOUNCE;   # D_REJECT when front-end MTA
$final_spam_destiny       = D_BOUNCE;
$final_bad_header_destiny = D_PASS;     # False-positive prone (for spam)
[...]

Afterwards, run these commands to add the clamav user to the amavis group and to restart amavisd-new and ClamAV:

adduser clamav amavis
/etc/init.d/amavis restart
/etc/init.d/clamav-daemon restart

Next we must edit the configuration file of the Freshclam daemon (that’s the daemon that regularly and automatically fetches the newest virus signatures from a ClamAV mirror) because it contains a small bug. Open /etc/clamav/freshclam.conf and modify the NotifyClamd line as shown below:

vi /etc/clamav/freshclam.conf

[...]
NotifyClamd /etc/clamav/clamd.conf
[...]

Then restart Freshclam (make sure no other Freshclam process (maybe of another ClamAV installation) is running because then our Freshclam will fail to start):

/etc/init.d/clamav-freshclam restart

Now we have to configure Postfix to pipe incoming email through amavisd-new:

postconf -e ‘content_filter = amavis:[127.0.0.1]:10024′
postconf -e ‘receive_override_options = no_address_mappings’

Afterwards append the following lines to /etc/postfix/master.cf:

vi /etc/postfix/master.cf

[...]
amavis unix - - - - 2 smtp
        -o smtp_data_done_timeout=1200
        -o smtp_send_xforward_command=yes

127.0.0.1:10025 inet n - - - - smtpd
        -o content_filter=
        -o local_recipient_maps=
        -o relay_recipient_maps=
        -o smtpd_restriction_classes=
        -o smtpd_client_restrictions=
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o mynetworks=127.0.0.0/8
        -o strict_rfc821_envelopes=yes
        -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
        -o smtpd_bind_address=127.0.0.1

Then restart Postfix:

/etc/init.d/postfix restart

Now run

netstat -tap

and you should see Postfix (master) listening on port 25 (smtp) and 10025, and amavisd-new on port 10024:

server1:~# netstat -tap
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 *:4069                  *:*                     LISTEN     3457/rpc.statd
tcp        0      0 localhost.localdo:10024 *:*                     LISTEN     6886/amavisd (maste
tcp        0      0 localhost.localdo:10025 *:*                     LISTEN     7268/master
tcp        0      0 *:sunrpc                *:*                     LISTEN     3083/portmap
tcp        0      0 *:auth                  *:*                     LISTEN     3417/inetd
tcp        0      0 *:smtp                  *:*                     LISTEN     7268/master
tcp6       0      0 *:imaps                 *:*                     LISTEN     4952/couriertcpd
tcp6       0      0 *:pop3s                 *:*                     LISTEN     4872/couriertcpd
tcp6       0      0 *:pop3                  *:*                     LISTEN     4815/couriertcpd
tcp6       0      0 *:imap2                 *:*                     LISTEN     4905/couriertcpd
tcp6       0      0 *:ssh                   *:*                     LISTEN     3438/sshd
tcp6       0      0 *:smtp                  *:*                     LISTEN     7268/master
tcp6       0    148 server1.example.com:ssh localhost:3117          ESTABLISHED3519/0

If you like you can now add Razor, Pyzor, and DCC to SpamAssassin to improve its filtering performance. Razor, Pyzor and DCC are spamfilters that use a collaborative filtering network. To install them, run

apt-get install razor pyzor dcc-client

Now we have to tell SpamAssassin to use these three programs. Edit /etc/spamassassin/local.cf and add the following lines to it:

vi /etc/spamassassin/local.cf

[...]

# dcc
use_dcc 1
dcc_path /usr/bin/dccproc
dcc_add_header 1
dcc_dccifd_path /usr/sbin/dccifd

#pyzor
use_pyzor 1
pyzor_path /usr/bin/pyzor
pyzor_add_header 1

#razor
use_razor2 1
razor_config /etc/razor/razor-agent.conf

#bayes
use_bayes 1
use_bayes_rules 1
bayes_auto_learn 1

Restart amavisd-new afterwards:

/etc/init.d/amavis restart

That’s it already. Now watch your mail log (/var/log/mail.log) to see if amavisd-new is working properly. amavisd-new will log whenever it finds a spam or virus email. When you (re)start amavisd-new it should also log that it loads its spam and virus scanning code (if not, you probably did something wrong).

For taking a live look at your mail log, you can use this command:

tail -f /var/log/mail.log

(Press CTRL + c to leave the log.)

• Integrating amavisd-new Into Postfix For Spam- And Virus-Scanning – Page 2

next Integrating amavisd-new Into Postfix For Spam- And Virus-Scanning – Page 2
Copyright © 2007 Falko Timme
All Rights Reserved.

Related Tutorials

• Virtual Users And Domains With Postfix, Courier And MySQL (+ SMTP-AUTH, Quota, SpamAssassin, ClamAV)
• Virtual Users And Domains With Postfix, Courier And MySQL (Fedora Core 5)

Introduction

This is a copy & paste howto. The easiest way to follow this tutorial is to copy paste the commands directly into your ssh client. Be careful when you’re required to provide your own custom data, like IP addresses, hostnames or passwords.

The following tutorial is a detailed description of how to install a Debian based distro (Debian Etch in this example) on an EasySpeedy server. EasySpeedy offers dedicated server hosting with the ability for customers to perform remote recovery and maintenance over ssh. This is exactly what we need to install our debian based distro from scratch, using debootstrap.

I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal and there are no guarantees that this howto will work for you.

The Server

I will be using a standard EasySpeedy server:

Processor AMD Athlon 64 3500+
RAM 1 GB DDR2 RAM
Hard drive 250 GB SATA

After you’ve logged in to your server control panel on the EasySpeedy website, you’re presented with an automated system for installing several linux distributions. Although this is very handy, I wanted Debian Etch on my server. Sadly, it hasn’t been added yet to the list of available distributions for automated installation. Because of this, I decided to try the Debian Sarge installation and then dist-upgrade to Etch. This should have been fairly easy to do, but the default partition scheme that came with Sarge didn’t meet my needs.

The Handy Rescue System

To install Debian Etch using deboostrap we’re going to use one of the rescue systems that EasySpeedy provides. The one I chose for doing this, is described as follows:

“This is our Forensic Recovery Tool. It boots a minimal Linux distro into RAM, and allows SSH login. Using this recovery tool it is possible to perform most recovery operations, as well as more complex forensic tasks. It includes a complete build environment, and is capable of using slackware packages. It also includes a pre-built version of chkrootkit (from the slackware project).”

As it provided a build environment, I thought this tool was the best one for this task. Select the Forensic Recovery Tool and press the install button. An email will be sent to you after the system is rebooted and ready to use. This process takes no time.

We need to log in to our little rescue friend now. If you don’t have an ssh client, you can install it with aptitude or apt-get.

aptitude install openssh-client

Now let’s connect to the rescue system:

ssh 82.103.XXX.XXX

The Partition Scheme

At this point, we need to plan a partition scheme for our new Etch system. What we’re going to do now is to delete the existing partition scheme and create a new one. We’re going to do so with fdisk.

First of all, this is the partition scheme I had in mind:

/ => /dev/sda5
/home => /dev/sda6
/usr => /dev/sda7
/tmp => /dev/sda8
/var => /dev/sda9
swap => /dev/sda10

Now lets execute fdisk on /dev/sda:

fdisk /dev/sda

We need to erase the existing partitions. To do this, you must press d and then enter the partition number for the partition you want to delete. You’ll have to delete all partitions.

Command (m for help): d
Partition number (1-7): 7

Command (m for help): d
Partition number (1-6): 5

Command (m for help): d
Partition number (1-5): 5

Command (m for help): d
Selected partition 1

Now that you have erased your existing partitions, you need to create your new partition scheme. Press n and then enter e to make a new extended partition. Answer 1 when you’re required to enter a partition number. Next, you’ll be asked about what should be the first cylinder for the extended partition. Default value is 1. Accept it and press enter. Then, you will be asked for the last cylinder. Accept the default value too, and press enter. This will make a new extended partition starting at cylinder 1 to the last cylinder. When you’ve done this, you’ll have to create logical partitions for sda5 through sda10, though sda10 will be our swap.

For setting up the size of the partitions you can answer with cylinders or with size in MB. For answering with MB size, you use the following syntax: for example, 10000M would be 10GB.

In this tutorial I use the cylinder approach, but you’re free to use the M approach also.

Please notice that the first command I enter is p. This should show an empty partition set, as is shown now:

Command (m for help): p

Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

No we create the extended partition.

Command (m for help): n
Command action
e extended
p primary partition (1-4)
e
Partition number (1-4): 1
First cylinder (1-30401, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-30401, default 30401):
Using default value 30401

To create the logical partitions, press n key, and then l. Accept default first cylinder and then for the last cylinder you can either enter the size like in 10000M, or specify the exact last cylinder number. I will enter cylinder numbers.

Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (1-30401, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-30401, default 30401): 366

Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (367-30401, default 367):
Using default value 367
Last cylinder or +size or +sizeM or +sizeK (367-30401, default 30401): 1583

Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (1584-30401, default 1584):
Using default value 1584
Last cylinder or +size or +sizeM or +sizeK (1584-30401, default 30401): 2192

Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (2193-30401, default 2193):
Using default value 2193
Last cylinder or +size or +sizeM or +sizeK (2193-30401, default 30401): 2497

Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (2498-30401, default 2498):
Using default value 2498
Last cylinder or +size or +sizeM or +sizeK (2498-30401, default 30401): 29915

Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (29916-30401, default 29916):
Using default value 29916
Last cylinder or +size or +sizeM or +sizeK (29916-30401, default 30401): 30401

Now you must change /dev/sda10 to Linux swap / Solaris. To accomplish this press t, and select the partition number (10). Then enter 82. This should make /dev/sda10 a swap.

Command (m for help): t
Partition number (1-10): 10
Hex code (type L to list codes): 82

To save changes to the disk, press w key.

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

At this point, we’re finished with fdisk.

You can exit fdisk with q:

Command (m for help): q

This is what my partition scheme looked like when I finished:

Device Boot Start End Blocks Id System
/dev/sda1 1 30401 244196001 5 Extended
/dev/sda5 1 366 2939832 83 Linux
/dev/sda6 367 1583 9775521 83 Linux
/dev/sda7 1584 2192 4891761 83 Linux
/dev/sda8 2193 2497 2449881 83 Linux
/dev/sda9 2498 29915 220235053+ 83 Linux
/dev/sda10 29916 30401 3903763+ 82 Linux swap / Solaris

• How To Install A Debian Based Distro On An EasySpeedy Server – Page 2
• How To Install A Debian Based Distro On An EasySpeedy Server – Page 3

next How To Install A Debian Based Distro On An EasySpeedy Server – Page 2
Copyright © 2007 danf.1979
All Rights Reserved.

Related Tutorials

• The (Almost) Perfect Setup – Debian Sarge (3.1) On A Strato Dedicated-Server (With ISPConfig)

Selling fake, of course, can’t be in the store. Louis Vuitton Outlet Do this plot, or compare self-knowledge. Their hands push a flat car, the car put a paper carton, carton stack on a big burden. Baggage what’s in the trunk, need not I but confessed, you can guess. Right! The world famous brand is fake leather bag, and have LV, GUCCI, GUESS, COACH, and so on. Can say is everything. The package is very fine work almost be the real thing. It is said that these selling fake of the elder brothers, when the worst of the bag shop name after the close, in the store a burden before stall, let people think is our at a HuiLei sale today. Sell the fake can arrogant to such a degree, also be YouDanYouShi…….

As the saying goes, have sold has to buy. Spread the burden on the ground after, can cause many people stopped to watch, and some are still very carefully leaned forward to choose. Visible, the United States is the small gain, is also gained a cheap fakes. These in regular stores to sell $12000 of leather bag, and in the baggage on the stand only need $60, than domestic market cheaper foreign goods tanggu district. According to the guide liu said, in the baggage on the stand to buy things, such as COACH bag, than in its stores to buy work to be good. So somebody said, really like false, false but really like. It’s no wonder that whether false or true, are MADE IN CHINA, only is the object of supply different just, the source is exactly the same.

Hear, these counterfeit product, both from domestic to get to the batch, the wholesale price for each only twenty dollars. A $20 to $60 bag can sell, is also profits. In the street people publicly to sell these name of bag, nearly all of them for black brothers. They also ghost is fine, lay spread out, both hands captures two horns burden is working. There is a slight, immediately accept hand scroll up bedding for visitors to shape. More interesting is, these sell fake guy, but with his radio. One thousand east to the police, he was immediately report the news to the west. Even if a miss, not a nets were playing do.

Not only in the United States, there are fake, Europe has. Especially some specifically targeted at Chinese tourists open duty free, inside openly selling some 3 without the product. Why to sell 3 without the product? Because of the high price local famous brand. Such as a small Swiss army knife, in Europe to sell more than ten 20 euros. And similar knockoffs, only a two euros. However, they sell these goods, also dare not use genuine of the trademark. This, Europe than the United States. And, of course, more than China.

In one of the biggest when, is in Japan. The Japanese have a store called one hundred yuan shop. Meaning is the goods store no matter size, each all of one hundred yen. That year, around one hundred yuan shop, said that the Japanese shops wooden bowl good. A the elder brothers to buy the xing, all bought 10 small bowl, ten large bowl, Louis Vuitton Canada gather together the size two table seats. But after returning home a use, big call yesterday. Japanese wooden bowl, was the resin, brush a layer of paint it. Devil, slippery slippery.

So, go abroad in the outside, don’t listen to foreign without the counterfeit goods rumors. In the shot buy something, or must be careful to prudent. read from: http://www.louisvuitton-canada.ca

Version 1.0
Author: Cameron Camp <howto [at] logicalwebhost [dot] com>
Last edited: Jan. 16th, 2008

If you’re trying to set up a home network, you probably want to set up a permiter facing computer connected to your DSL/Cable modem, and then put all of your computers behind that firewall box to keep them safe. This tutorial will show you how to use a single external connection on the gateway computer (using Iptables firewall), and a second internal connection on the same box so you can connect the computers on the inside of your home/office to it, and automatically give them IP’s when you hook them up (using DHCP server). Iptables can be very complicated, we will only configure a basic firewall, you can add more security later without breaking things. In Linux there are many ways to do this, this one is hopefully simple enough and will teach you the basics. I did this on a CentOS 5 box, though it would work on Debian variants with only slight modifications. During this tutorial I’m logged in as root, which you should generally NOT do, but it makes the tutorial simpler, but if you prefer to do it more securely, add “sudo” before each command and it will work.

The computers on the inside of your office will also be able to talk to each other, so you can hook up printers, computers and share network connections through the switch as well. You can also set up things on your Gateway server box later like a network backup drive for all your computers using Samba relatively simply. There’s a lot of expandability in this setup, but we’ll keep it simple for now.

The first thing to do on your Gateway server is configure and enable Iptables, the default firewall that comes with CentOS. We will tell it to allow outbound traffic from your eth1 interface to the internet. You have to add an Iptables entry, save it and restart Iptables.

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
service iptables save
service iptables restart

Now we have to tell the kernel to start allowing forwarding so the rule will work:

echo 1 > /proc/sys/net/ipv4/ip_forward

This will only work until you reboot, so let’s make it permanent, using your editor of choice, add the following line to /etc/sysconfig/network:

FORWARD_IPV4=YES

Now we have to set up a DHCP server to give out the IP’s to the computers on the inside of the LAN. We do that by installing the DHCP server like this:

yum install dhcp

By default, there will be a sample DHCP file created that we’ll edit and then replace the real one:

cd /usr/share/doc/dhcp-whateverversionyouhave/
vi dhcpd.conf.sample

You can cut/paste the one I’m using, or just edit yours to suit your needs. A word of caution, your network might be different than mine. This file will give your internal computers a range of IP’s from 192.168.0.128 to 192.168.0.254 with a subnet mask of 255.255.255.0, change to suit your needs. You’ll also have to make the IP information match on eth1 static IP later if you use your own values here.

ddns-update-style none; # keep it simple for now
ignore client-updates;  # here too
DHCPARGS=eth1;          # tells it what interface to listen on
subnet 192.168.0.0 netmask 255.255.255.0 {
# --- default gateway
       option routers                  192.168.0.1;   # gateway on your eth1 internal interface
       option subnet-mask              255.255.255.0; # subnet mask
       option domain-name              "example.com" # domain name given to client
       option domain-name-servers      209.242.10.10; # the IP of your ISP's nameservers you're using
       option time-offset              -18000;        # Eastern Standard Time - set to what you have
       range 192.168.0.128 192.168.0.254;             # the range of IP's your clients will get
       default-lease-time 21600;                      # how long the client's will keep the same IP
       max-lease-time 43200;
       # we want the nameserver to appear at a fixed address
       host ns {
               next-server ns1.ispserver.net;         # change to your ISP's nameservers
               hardware ethernet 00:09:5B:8E:05:67;   # hardware MAC
               fixed-address 209.242.10.10;           # your ISP's nameserver IP
      }
}

Now back up your current dhcp config file and copy the one you just made over it:

mv /etc/dhcpd.conf /etc/dhcpd.conf.old
cp dhcpd.conf.sample /etc/dhcpd.conf

Now we restart the DHCP server (after checking the configuration for errors, if there are errors, you’ll find them listed in /var/log/messages) so the changes will take effect

service dhcpd configtest
service dhcpd restart

Now we have to configure the eth1 (internal) interface to match what we just did in the DHCP server, so edit the file /etc/sysconfig/network-scripts/ifcfg-eth1 so it looks something like this:

DEVICE=eth1
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.0.1
NETMASK=255.255.255.0
GATEWAY=10.1.10.43

You’ll have to edit at least the GATEWAY IP, that’s just the IP of my eth0 interface, change it be whatever your eth0 IP is, which you can find out by running:

ifconfig

It should say something like: eth0 inet addr:10.1.10.43, that’s the one you want.

Next you have to tell your computer to listen for the telltale DHCP request to come across the inside network. When a client computer goes looking for a DHCP address, it sends out a blast to anyone that’ll listen that has an IP address of 255.255.255.255, so you have to tell your DHCP server to listen for that IP:

route add -host 255.255.255.255 dev eth1

So now we test the setup. You should be able to go to one of the client computers, hook it up to the switch where your gateway is connected (in my case a cheap home Netgear $30 8 port switch model# FS608) and it should find an IP using your new DHCP server, and you should be able to browse the internet.

You should also set up your firewall to block more things than we’ve done in this tutorial to keep your internal computers safe, which you can do using the configuration tool built by running:

setup

to tell the firewall what to block. A rule of thumb is to block everything and then only allow what you need, but you can read about that elsewhere in daunting depth if you choose.

Copyright © 2008 unclecameron
All Rights Reserved.

In this tutorial we will be installing and setting up Mailscanner as a mail firewall in front of a Communigate pro cluster. This tutorial has been written for the CENTOS 5.x Linux distro but am sure it can be used for any other Linux based system with little modifications. The system will run with SELinux in enforcing mode. The components that we will use include:

• Mailscanner
• Clamav
• exim
• apache
• mailwatch
• razor
• spamassassin
• mysql
• fuzzy ocr
• sanesecurity signatures
• mailfeeder

Install Packages

I assume that you have installed a bare bores CENTOS 5 system with the “Development Tools” group to work with so I will not go much into issues such as package selection and partition layout. As we will need to install certain software that is not part of the default CENTOS bases, we need to configure the system to use Dag Wieers rpm repo as he does package lots of software that we need.

rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm

With that done we have configured the system to use the rpmforge repo.

For this tutorial the working directory will be /usr/local/src – all downloads should be downloaded to and extracted in there.

Exim

yum install exim -y
/usr/sbin/alternatives –set mta /usr/sbin/sendmail.exim
service sendmail stop
/sbin/chkconfig –level 345 sendmail off
/sbin/chkconfig –level 345 exim off

MailScanner

wget http://www.mailscanner.info/files/4/rpm/MailScanner-4.66.5-3.rpm.tar.gz
tar xzvf MailScanner-4.66.5-3.rpm.tar.gz
cd MailScanner-4.66.5-3
./install.sh

Clamav

yum install clamav clamav-db clamd -y
freshclam

Sanesecurity Signatures

wget http://www.sanesecurity.co.uk/clamav/update_sanesecurity.txt -O /usr/local/bin/update_sanesecurity.sh
chmod +x /usr/local/bin/update_sanesecurity.sh
ln -s /usr/local/bin/update_sanesecurity.sh /etc/cron.hourly/
/usr/local/bin/update_sanesecurity.sh

Apache

yum install httpd php php-mysql php-gd php-eaccelerator -y
/sbin/chkconfig –level 345 httpd on

Spamassassin

yum install spamassassin -y

Fuzzy OCR

yum install netpbm-progs ocrad gocr gifsicle giflib-utils giflib -y
svn co svn://svn.own-hero.net/fuzzyocr/trunk/devel
cd devel/
perl -MCPAN -e ‘install String::Approx’
perl -MCPAN -e ‘install Time::HiRes’
perl -MCPAN -e ‘install Log::Agent’
cp -rv {FuzzyOcr.cf,FuzzyOcr.scansets,FuzzyOcr.preps,FuzzyOcr.pm,FuzzyOcr.words,FuzzyOcr/} /etc/mail/spamassassin
chcon -R system_u:object_r:etc_mail_t /etc/mail/spamassassin/{FuzzyOcr.cf,FuzzyOcr.scansets,FuzzyOcr.preps,FuzzyOcr.pm,FuzzyOcr.words,FuzzyOcr/}
wget http://www.gbnetwork.co.uk/mailscanner/FuzzyOcr.words -O /etc/mail/spamassassin/FuzzyOcr.words

Razor

yum install razor-agents

MySQL

yum install mysql mysql-server -y

Mailwatch

wget http://dfn.dl.sourceforge.net/sourceforge/mailwatch/mailwatch-1.0.4.tar.gz
tar xzvf mailwatch-1.0.4.tar.gz
cd mailwatch-1.0.4
cp -av mailscanner/* /var/www/html/
cp /var/www/html/conf.php.example /var/www/html/conf.php
mkdir /var/www/html/temp
chmod u+rwx /var/www/html/temp
rm -f /var/www/html/{index.php,xml,jpgraph,fpdf}
cp /var/www/html/status.php /var/www/html/index.php
mv /var/www/html/jpgraph-1.12.1 /var/www/html/jpgraph
mv /var/www/html/fpdf152 /var/www/html/fpdf
mv /var/www/html/xmlrpc_1.2 /var/www/html/xmlrpc
chown apache.apache -R /var/www/html/
chmod ug+rwx /var/www/html/images
chmod ug+rwx /var/www/html/images/cache
chcon -R system_u:object_r:httpd_sys_content_t /var/www/html/
cp MailWatch.pm /usr/lib/MailScanner/MailScanner/CustomFunctions/
cp SQLBlackWhiteList.pm /usr/lib/MailScanner/MailScanner/CustomFunctions/
cp tools/db_clean.php /usr/local/bin/
cp tools/quarantine_maint.php /usr/local/bin/

Mailfeeder

wget http://www.pldaniels.com/mailfeeder/mailfeeder-0.2.3.tar.gz
tar xzvf mailfeeder-0.2.3.tar.gz
cd mailfeeder-0.2.3
make
cp mailfeeder /usr/local/bin/

Configure Packages

Configure Exim

Introduction

To run exim with mailscanner you need 2 configuration files one for the daemon that will listen on port 25 and accept incoming mail and another for the exim process that will deliver the clean mail that has been scanned by mailscanner. You also require 2 queues one for incoming and the other for clean mail that has been scanned.

I will not dwell on all the configuration options that exim provides i expect that you will be able to get detailed info else where on how to configure an normal running exim system so i will only focus on those areas that are specific to this setup.

• So to begin backup your exim configuration then create the second configuration file out the outbound process.

cp /etc/exim/exim.conf /etc/exim/exim.conf.orig
cp /etc/exim/exim.conf /etc/exim/exim_out.conf

Inbound Exim

This is the configuration for the exim daemon that listens on port 25 and accepts the messages and queues them for mailscanner to process. The configuration file is /etc/exim/exim.conf.

Anti-virus / Sanesecurity Checks

Configure the incoming exim daemon (/etc/exim/exim.conf) to use clamav to scan incoming mail and reject virus infected email and image and pdf spam at smtp time.

av_scanner = clamd:/var/run/clamav/clamd.sock

Mail Routing

Configure the domains you accept mail for, we will add these to a file /etc/exim/relay_domains.

# example /etc/exim/relay_domains
example.com

Specify this in the exim configuration:

domainlist relay_to_domains = lsearch;/etc/exim/relay_domains

Configure the routing of the domains you are filtering mail for in the file /etc/exim/mail-routes.

#example /etc/exim/mail-routes
example.com: xxx.xxx.xxx.xxx:xxx.xxx.xxx.xxx #this domain is on a CGP cluster of 2 front end nodes
somedomain.com: xxx.xxx.xxx.xxx # this delivers to one CGP machine

Configure a router to accept mail for the relay domains. You need to add this under the check_backend: router (see address verification below).

deliver_clean:
  driver = manualroute
  domains = +relay_to_domains
  transport = remote_smtp
  route_data = ${lookup{$domain}lsearch{/etc/exim/mail-routes}}

Mailscanner Intergration

Configure the inbound exim just to queue the messages and not deliver to enable mailscanner to process them.

spool_directory = /var/spool/exim.in
process_log_path = /var/spool/exim/exim-process.info
queue_only = true
queue_only_override = false

RBL’s

Configure the RBL’s under acl_check_rcpt:

drop    message       = REJECTED because $sender_host_address is in a black list spamhaus.org
           dnslists      = xen.spamhaus.org
drop    message       = REJECTED because $sender_host_address is in a black list at $dnslist_domain\n$dnslist_text
           dnslists      = bl.spamcop.net
drop    message       = REJECTED because $sender_host_address is in a black list at $dnslist_domain\n$dnslist_text
           dnslists      = dnsbl.sorbs.net

• Mailscanner/Exim Gateway With Communigate PRO Guide – Page 2
• Mailscanner/Exim Gateway With Communigate PRO Guide – Page 3

next Mailscanner/Exim Gateway With Communigate PRO Guide – Page 2
Copyright © 2008 Andrew Colin Kissa
All Rights Reserved.

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