Online programs are not run unnecessarill

Aug 23

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Online programs are not run unnecessarily

Myth 4 An active firewall log must constantly attacks

Many firewalls report by pop -up when they discard packets that arrive without having been previously requested by a program. The pop – ups appear as a warning , sometimes even tone.But these warnings are almost always superfluous : In most cases , the reported packages only the answers to questions which have one of your tools – generated about the browser – which , however, are unaware of the firewall .

Anyone who dials also new to an online connection , you get an IP address that was eventually awarded recently to a different PC,Dell inspiron 2650 battery and sent to the remaining packages.

Also: Hackers scan the Internet for vulnerable computers running automated . Check per ping, which allow incoming connections computer by scanning all the IP address ranges. Just go to some worms. Even such scans loose in a mitteilungsfreudigen a firewall warning .

Consequence: Turn off the news – usually the firewall offers this option.

Myth 5 Closed ports enhance security

Basically mean fewer open ports less attack surface. But there is a method that can be closed ports deal : In the so -called tunnels sends the user via an open port dienstfremde data that are not intended for transmission via this port. In order to trick the network service of the port , the user data previously converted in the format .

One example: Almost always , the port 80 is open to the HTTP protocol. On such a HTTP tunnel can be exchanged and FTP data , although the FTP port 21 ( ) is closed. The FTP data were embedded it in an HTTP protocol. Especially popular for tunneling connections over HTTPS ( Hypertext Transfer Protocol Secure ) are . The integrated encryption prevents evaluate the firewall sent the data and can eventually block . Many file-sharing programs , which are used to music, movies and other files exchanged over the Internet tunnel , the data on port 80, as their default port is blocked in many companies.

However, must be configured for a tunnel , both sides of the connection. Is active on a PC no tunnel software, an attacker can not use from outside the gap.

Consequence: With the firewall to make the ports close makes sense in any case. More important is that you are not doing any online programs – such as an FTP server – you do not need. But the tools you need , you should always provide you with updates.

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