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First thing to do is go into your router and make sure that you have the latest firmware installed - if it is no longer supported then the chances are that you are extremely vulnerable to attack, in which case I would buy a new router. Once an attacker is in your router, there are all sorts of things they can do, not least is to route all your DNS to a hostile one that presents fake pages for credential stealing.<br />
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Many of the most recent vulnerabilites do not require the remote attacker to get your Wifi password, and they can be sitting anywhere in the world, let alone outside your house :)
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First thing to do is go into your router and make sure that you have the latest firmware installed - if it is no longer supported then the chances are that you are extremely vulnerable to attack, in which case I would buy a new router. Once an attacker is in your router, there are all sorts of things they can do, not least is to route all your DNS to a hostile one that presents fake pages for credential stealing.

Many of the most recent vulnerabilites do not require the remote attacker to get your Wifi password, and they can be sitting anywhere in the world, let alone outside your house :)

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Thanks and good luck with your testing.
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Hi,<br />
<br />
I d like to see how good my Wi-Fi is protected so how can I test this and see what would happen when somebody could get connected to my Wi-Fi (what he could see/do)? <br />
<br />
That way I could take countermeasures.<br />
<br />
J
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Hi,

I d like to see how good my Wi-Fi is protected so how can I test this and see what would happen when somebody could get connected to my Wi-Fi (what he could see/do)? 

That way I could take countermeasures.

J

Hack my own Wi-Fi?

Home security includes the hardware and software in place to monitor and protect property, and personal security practices. The hardware can include the doors, locks, alarm systems, lighting, motion detectors, and cameras systems; the software can include applications connected to smart systems in your home or business or electronic surveillance systems provided by vendors. Personal security practices would be ensuring doors are locked, alarms activated, windows closed and many other routine tasks which act to prevent misfortunes.

Home Security

The cyber security specialization covers the fundamental concepts underlying the construction of secure systems, from the hardware to the software to the human-computer interface, with the use of cryptography to secure interactions. Cyber security refers to the protection of personal or organizational information or information resources from unauthorized access, attacks, theft, or data damage. This includes controlling physical access to the hardware, as well as protecting against the harm that may come via network access, data and code injection, and due to malpractice by operators, whether intentional, accidental, or due to them being tricked into deviating from secure procedures.