Phishing is a social engineering technique that
manipulating people to perform some actions as the attacker wants. The attacker
prepares an e-mail as if it was sent from a known individual or organization, and
leads the victim to click on a link that will take the user to a malicious
website or download some malicious file, or to a fraudulent website that
appears legitimate so the victim enters his username and password or some more
individual information about himself.
Phishing is a very successful technique because people do not visit websites carefully or they do not have much time to be more careful, to investigate about the website or e-mail. One of the reasons may be that they did not become a victim before, or maybe they do not know even if they were. People easily trust brands and/or logos and influential texts. There is a lack of information assurance knowledge.
How Does Phishing Works?
Countermeasures
The most effective defense against phishing is creating user awareness. One
employee that you do not improve his awareness can cause to be hacked.
“You are as strong
as the weakest link in your defense system” Sun Tzu
Do
not let your clients use company e-mail addresses in Internet for personal
usage. Spammers search internet for the e-mail addresses used by company to send
the spam mail to more users.
Never
respond to spam, or click on “unsubscribe” links from questionable sources.
Make
sure your antispam solution works J
Use
Proxy servers in company, for clients’ internet usage. A Proxy server that has
a dynamic scanning feature can decrease the possibility to be hacked by
phishing. Even if the user opens the link in the e-mail, the Proxy would not
let him to enter the website.
Even if it is not enough for your security, ensure that all employee’s
PCs, and antivirus agents are up to date.
Websense says that you should not lose any incident in this scenario, and I have tried a few times, I really did not lose any incident. 
To get the list of hostnames of a
network, first create a txt file with includes one ip address in each
line (ip_list.txt). You can get the hostname list (hostname_list.txt) of
the IP addresses that you wrote in the ip_list.txt file with using the
script below;
IoT (Internet
of Things) transforms the industries with the ability to connect, communicate
with, and remotely managed automated devices via internet. This is the future
in today, but the main problem is that it is relatively new in the industries.
Because of the new concept, and the high and fast competition of the manufacturers,
security has not always been considered in product design. In this case of
competition, it is more important to put the product on the market faster. Furthermore,
they cannot keep pace with rapidly changing techniques of hacking. Many IoT
products are sold with old and unpatched embedded operating systems and
software. 
Google Allo is a new announced chat app and it has really a new perspective as it does not make end-to-end encryption unlike its competitors :S
To send an e-mail, basicly your computer connects to the remote mail server and
talks to it using SMTP (Simple Mail Transfer Protocol). 