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remote trojans
The remote access trojans are the kind of trojans that after they get
installed, they make a "backdoor" on your system, so the intruder may
return later and access your computer remotely. Usually the remove
access is done later by an open port. However, this technique was widely
used and now it's very easy detectabale so the evil programmers came to
more advanced methods such are ICMP communication or UDP communication
hidden in simple DNS requests. Another new method used by the trojan is
to connect to a master server instead of waiting for a connection on an
open port. This was it cannot be detected by the port scanners and can
also pass through firewalls since most firewalls allow connections to be
made by local programs and block just external access.
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thespyware.net |
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