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There is spyware for every operating system. It is more prevalent for windows than any other operating system because it is used more. There are around 40 known spyware applications for Linux. It is not common but it can happen. As for antivirus this is a list that may help you. Best of luck! ...


If your friend is familiar with programming, it is possible that he has written a custom spyware script. That is quite easy under Linux, and a common prank to play on unsuspecting friends. Because it is custom, no antivirus program may be able to find it. Some common places to hide such scripts are the startup files in your home directory, ~/.bashrc etc. ...


Spyware also exists in browser apps (like those for chrome) so even if you are absolutely sure you have nothing local installed that contains spyware, if you use untrusted webapps, you can be exposed.


You need to upgrade skype to version


The output you provided actually means that port 5060 is open and nothing is blocking it, because you got Connected to But the connection got terminated by the destination host as soon as it was created, that's why it directly goes to Connection closed by foreign host. This is probably because the program that is listening on that port is ...


Something I do to get around issues like this: a SOCKS5 proxy over ssh. If you've got a linux box outside of the network, you can do something like: nohup ssh -D 8000 -C -N user@host > /dev/null 2>&1 & This will open a secure ssh tunnel to your host, giving you a SOCKS5 proxy on port 8000, and disassociate it with the terminal (so you can ...


Any system can have virus. If your friend, had direct acess at your ubuntu or know the root password, will be easy to put some keylogger in it. Look up if he put logkeys https://code.google.com/p/logkeys/


Credit to kraxor's comment on the original question: You should try reinstalling iptables by executing the following command: sudo apt-get --reinstall install iptables


Yes, there is spyware-like behavior in several Unix applications. I worry most about all the applications sending auto-update and metadata lookup requests, often with information about your computer and network activity. You can use a tool like Wireshark to detect any suspicious network activity and track it down to which applications are sending ...


If you are using a desktop computer and have a keyboard attached to it, then you should check if there is a key logger put between your keyboard and your computer. Obviously such a key logger will not care what OS you run.


I also do not have /etc/init.d/ufw and ufw was not auto starting on reboot. But I did this sudo apt-get install iptables-persistent On rebooting I checked with sudo ufw status It showed active, It always used to show inactive in previous reboots and I used to have to do sudo ufw enable I have not installed gufw, I am beginner desktop user, so I ...

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