The row doesn’t look like its an active link but just clicked on it and this is what showed up.

Then proceeded to download both firmware binaries. The first image is to flash DIR-615 to DD-WRT, the second image is to upgrade the DD-WRT firmware.

Update Firmware to DD-WRT

Connected D-Link DIR-615 directly to my computer via ethernet. Logged in to D-Link’s web interface. Under Tools -> Firmware, I uploaded the first image, dir615c1-factory-to-ddwrt-firmware.bin. Then hit the upload button.
Waited for a couple of minutes then the router became unreachable. Normal under these conditions since my D-Link router was configured to be accessed at this IP address, 192.168.0.1, after the DD-WRT firmware install, ip address defaults to 192.168.1.1.
Logged in to the web interface. Then went ahead and upgraded the firmware with the second image, dir615c1-firmware.bin. Found it via Administration Tab -> Firmware Upgrade.
After the reboot, wireless radio was off. For some quirky reason, I had to enable clone mac to get the radio on.

Then I used the following configuration for my Wireless network.

A couple of notes, throughout all the process I used the Firefox browser. I didn’t do any hex edits or did a any configuration reset.

Already threw around 50GB worth of files big and small and so far WiFi hasn’t dropped yet (crossing my fingers).  So I guess I’m keeping this hardware for now, it’s not the fastest but it’s stable enough for my use.

Hope this helps ^_^

C:\bin>cpan
cpan> force install App::Ack

It will take a while for the install to complete, you’ll see plenty of text but this will not require any input from your end. When the window texts stop scrolling you are done. Quit after installation.

cpan> q

And you are done, enjoy using ack on Windows. If you’d like to find out more about how ack works, head over to the ack documentation. If you find this too troublesome you can use a windows port of the silver searcher instead. Instead of ack though, you’ll be using the ag command. Hope this help ^_^]]>

This assumes you already have MySQL and other web services installed on the target OS.

Install Zabbix Agent

Get required rpm for CentOS 6.

rpm -ivh http://repo.zabbix.com/zabbix/2.4/rhel/6/x86_64/zabbix-release-2.4-1.el6.noarch.rpm

Install the zabbix agent.

yum install zabbix-agent

Edit the config file for the zabbix agent.

nano /etc/zabbix/zabbix_agentd.conf

Fill variables with the correct values.

Server=<ip of zabbix server>
ServerActive=<ip of zabbix server>
ListenPort=10050
Hostname=hostname.of.server

Configure Agent to Work with MySQL

To make the zabbix agent get the correct values from MySQL, copy .my.cnf to /etc/zabbix

cp /root/.my.cnf /etc/zabbix
chown zabbix:zabbix /etc/zabbix/.my.cnf
chmod 600 /etc/zabbix/.my.cnf

Create a read only mysql user for the zabbix agent.

CREATE USER 'zabbix'@'localhost' IDENTIFIED BY 'r34d0nly';
GRANT SELECT ON *.* TO 'zabbix'@'localhost';

Then in /etc/zabbix/zabbix_agentd.d/userparameter_mysql.conf, set HOME to /etc/zabbix

nano /etc/zabbix/zabbix_agentd.d/userparameter_mysql.conf
HOME=/etc/zabbix

Change mysql.ping in /etc/zabbix/zabbix_agentd.d/userparameter_mysql.conf to:

UserParameter=mysql.ping,mysqladmin -uzabbix -pr34d0nly ping | grep -c alive

Add a mysql.running variable to userparameter_mysql.conf.

UserParameter=mysql.running,sudo /etc/init.d/mysql status | grep -c SUCCESS

Configure Sudoers

Run visudo to edit the sudoers file.

visudo

Add the following inside the sudoers file. This will allow the zabbix agent to run mysql status command.

zabbix ALL = NOPASSWD: /etc/init.d/mysql status

Place this right after: Defaults requiretty in visudo.

Defaults:zabbix !requiretty

Start zabbix agent and configure to start on boot.

service zabbix-agent start
chkconfig zabbix-agent on

Test the zabbix agent config and variables.

zabbix_agentd -t "mysql.running" -c /etc/zabbix/zabbix_agentd.conf
zabbix_agentd -t "mysql.ping" -c /etc/zabbix/zabbix_agentd.conf
zabbix_agentd --print

The mysql.running variable is a custom zabbix data. To effectively use the status of this data, a little customization is required on the zabbix server.
Note, make sure that the zabbix server ip is allowed through the firewall. If using CSF firewall, run the following command.

csf -a <ip of zabbix server> zabbix server

Find all folders named pipot in the current folder.

find . -type d -name "pipot"

Find all files with names starting with linux in the /home folder.

find /home -type f -name "linux*"

Find all files owned by user ween in the /home folder.

find /home -user ween

Find all files belonging to group ween in the /home folder.

find /home -group ween

Find all files belonging to user ween and chmod to 644 in the /home folder.

find /home -user ween -type f -exec chmod 644 {} \;

Find all files *.tmp in /tmp and remove them

find /tmp -name "*.tmp" -delete

See result of find syntax first before doing anything else

find /tmp -name "*.tmp" -ls

Find all files newer than March 15, 2016

find -newermt "mar 15, 2016" -ls

Find all files older than March 15, 2016

find -not -newermt "mar 15, 2016" -ls

Find all files between Jan 1, 2016 and Jan 30, 2016.

find -newermt "jan 01, 2016" -not -newermt "jan 30, 2016" -name "*.php" -ls

To find out more about using find and its features check out this man page from man7.org or this man page from gnu.org.

location = /xmlrpc.php {
    deny all;
    access_log off;
    log_not_found off;
    return 444;
}

The 444 response is unique to NGINX. The 444 status will cause NGINX to close the connection without sending any response. This will save your server’s processing power since it will not process the HTTP request at all. Do note that this will cause WordPress plugins that rely on xmlrpc.php to completely fail, please use with caution.

• CPU: Intel Core i7-4510U
• Memory: 8GB DDR3
• HDD: 1TB
• ODD: Yes
• Ports: Ethernet LAN, VGA, HDMI, SD card reader, audio socket, 3 USB ports

Here’s its CPU specs according to CPU-Z:

After getting the unit, I immediately upgraded the HDD to SSD, not going back to hard disks, that’s for sure. I used a Transcend SSD370 as replacement.
I won’t do an in-depth technical review for this laptop for the lack of time, this review from notebook check should give you an idea about its technical bearing (my unit’s CPU is better though).

The Good

Now here’s my experience with this laptop so far.
For what I usually do on computers (applications I use range from Word to Adobe Premiere), it’s spittin’ fast! The applications I run are very responsive even with the Adobe Master Suite.
The keys are well spaced, tactile feel isn’t the best but good enough for my use.
Laptop is cool (not IceCool though as ASUS is advertising), CPU temp ranges from 38 C to 45 C under average load. Ran a stress testing software (Prime95), temp peaked at 80 C and then settled at 70 C at full load. Despite that, the laptop was still responsive despite the load.
Screen is well lit and the colors look good, not a fan of the glossy screen though. Boot time was amazing, it was well under 10 seconds until the log-screen. Add another 8 seconds or so after you enter the password and it’s ready to take anything you throw at it.

The Not so Good

Unfortunately, there are a couple of things I particularly dislike about the ASUS X555LN.
The unit I got is a finger print magnet, for some reason the top cover is not the textured type, it’s glossy so I leave marks on it every time I touch it.
The edge of the bottom lid is a bit sharp and I need to move my wrist to a certain distance from the keyboard so that it’s comfortable to type.
The whole thing’s made of plastic so keyboard flexes if I put too much pressure on it.
The arrow keys are evenly spaced with the other keys so there’s no way to distinguish it by touch. I may eventually memorize the space like I did on my previous laptops but it will take a while so for now, I find it annoying to look at my keyboard every now and then.
Despite the shortcomings, I’m impressed with this laptop and hopefully this should last me the next 3 or 5 years. I even have this feeling that I’ve spent a bit much on hardware since I don’t play games anymore but I’m sticking to what Google said “FAST is the feature.’
Hope this helps ^_^

The Fix

First off, make sure that DKIM and SPF signing is enabled. This can be done inside cPanel via Email > Authentication. If both are enabled, login to WHM. Then head to DNS Functions > Edit DNS Zone. Pick the domain that requires the DKIM signing.
Look for the default._domainkey entry in a TXT record. What I have is this:

"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy+KxqqosNNcrPXOKcFJf2k3dX+LNM9+mE+7zttzo31vDniqOauHaArvZNfbKBvZDhgSde7I+GZF2yxXE5qHnZ8xizD7x4Rw2VT8mTPBD8hk7NE2cbwt5ub4kV2/vmi7YQld1CM4nqM+rO4dAGvGSV5lqCjPLCAalr4ymOyulF3vcYWNXfzbR6somy6Tjughn3" L4oZNmeBsimo1+u4+YyxtD6/nwhP8nafi8S0fsBH/94z0u/L/gZEhPX3Sl8P5j6AMdS9+dq06FICjUGKwCR+k84g0UYu1RJ44QkyrsvDDy95eX2WSU2s1Kz5P/qjtaST02dGPWaPBew3+0vDUwZwwIDAQAB\;

Then I edited the record to become this:

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy+KxqqosNNcrPXOKcFJf2k3dX+LNM9+mE+7zttzo31vDniqOauHaArvZNfbKBvZDhgSde7I+GZF2yxXE5qHnZ8xizD7x4Rw2VT8mTPBD8hk7NE2cbwt5ub4kV2/vmi7YQld1CM4nqM+rO4dAGvGSV5lqCjPLCAalr4ymOyulF3vcYWNXfzbR6somy6Tjughn3 L4oZNmeBsimo1+u4+YyxtD6/nwhP8nafi8S0fsBH/94z0u/L/gZEhPX3Sl8P5j6AMdS9+dq06FICjUGKwCR+k84g0UYu1RJ44QkyrsvDDy95eX2WSU2s1Kz5P/qjtaST02dGPWaPBew3+0vDUwZwwIDAQAB

I removed the first double quote, the double quote in between, then the back slash and the semi colon on the last part. Make sure to save after the edits.

Tools Used for Testing

With the DNS records correctly figured for reverse lookup. I got a 10/10 score on mail tester:

Tools used to verify validity of the DKIM and SPF records.
Mail Tester.
DKIM check of mxToolBox.
Email verification of port25.
Hope this helps ^_^

Prep the OS

Start by updating the OS:

yum update

After the update, run the screen command:

screen

Install cPanel

This is to ensure that the process doesn’t hang in case the ssh client disconnects. Install the latest stable version of WHM/cPanel.

cd /home && curl -o latest -L http://httpupdate.cpanel.net/latest && sh latest

In case the ssh client disconnects. Just reconnect again on the same host and run this command:

screen -r

After the install completes, activate the license for WHM/cPanel:

/usr/local/cpanel/cpkeyclt

Configure firewall for cPanel:

/scripts/configure_firewall_for_cpanel

Install IonCube and Zend Guard

Install ioncube loader.

/scripts/phpextensionmgr install IonCubeLoader

Install Zend Guard Optimizer.

/scripts/installzendopt

Login to https://$ip_address:2087/ to continue installation. The variable $ip_address could either be an ip assigned by your host or a fully qualified domain name.

Initial Configuration for cPanel

Login with the root credentials on the WHM control panel.

Update contact information. Make sure this is a working email address.

Configure the hostname. This should be a fully qualified domain (FQDN).

Fill in the ip addresses for domain resolvers. We use Google’s nameservers since they are pretty reliable and free.

Configure ethernet device. Common setup will only have one ethernet device.

Save and proceed to the next step.
Setup the ip address, just click on Skip This Step and Use Default Settings.

Since we’ve decided to use the cloudflare name servers, Name Server configuration is disabled.

Set the cloudflare name servers here. Note that this is account specific:

Add A entry is skipped.

Save and go to step 5.
On the next window configure FTP, mail and cPHulk. Disable FTP to force SFTP only.

Use Dovecot as mail server.

Enable cPHulk. Uncheck Install common set of Perl Modules.

Save and go to step 6.
Enable disk quotas.

Save and continue.
On the next window, use the default options.

Use default options as well with the new features.

Save settings.
Once this is done, make sure to enable ionCube and ZenGuard on cPanel. Go to Server Configuration > Tweak Settings > PHP.

Install Varnish

This install guide is for varnish version 3.x. Before installing varnish, change the port that Apache listens to, in this case 8080. It can be any other unused port. This can be accessed via Tweak Settings > System > Apache non-SSL IP/port.

Once this is done, install varnish:

yum install varnish

In case this generates an error. Add the varnish repository:

rpm --nosignature -i https://repo.varnish-cache.org/redhat/varnish-3.0.el6.rpm

Should the install fail with a jemalloc error. Add the EPEL repo:

rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

After install is complete, edit config file and change listening port to 80.

nano /etc/sysconfig/varnish

Edit this section.

VARNISH_LISTEN_PORT=80

In the same file, look for this

-s ${VARNISH_STORAGE}

And replace with:

-s malloc,2G

This tells varnish to write the cache in memory instead of file and limit the size to 2GB. You’ll have to set the allocation smaller if you have limited memory.
Create the varnish config file.

cd /etc/varnish/

mv default.vcl default.vcl.orig

nano default.vcl

Use the following configuration. Replace the $host_ip_address var to your host’s ip address. NOTE: if you use localhost or 127.0.0.1, varnish will fail to work. The site will show the default page instead of the correct content.

backend default {
    .host = "$host_ip_address";
    .port = "8080";
}
sub vcl_recv {
    if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
    return(lookup);
    }
}
# strip the cookie before the image is inserted into cache.
sub vcl_fetch {
    if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
    unset beresp.http.set-cookie;
    }
}

Save config and start the varnish service.

service varnish start

chkconfig varnish on

To view varnish stat issue this command.

varnishstat -1

Give yourself a pat on the back. You can start adding accounts on cPanel.

• Installed the 64bit version of python for notepad++ the msi file can be downloaded here.
• Installed emmet via the plugin manager.

The plugin ran fine, but for some odd reason, the default shortcut won’t run the expand abbreviation command (ctrl+alt+enter). This was solved by changing the shortcut mapping for the command to tab.

Just to show how awesome it is, Stefan of fettblog.eu shows how emmet rocks.