Criminals on the system ! Need Help !

[stan7213]

How to prevent remote access to the system ?
How to configure the system for NO REMOTE ACCESS?
I am new with debian and need your help !
Thanks for your help.

[bw123]

How to prevent remote access to the system ?
How to configure the system for NO REMOTE ACCESS?
I am new with debian and need your help !
Thanks for your help.

unplug the ethernet cable and disable/remove any wireless devices.

!

[Thorny]

bw123 is not making a joke. That really is the only way to prevent remote access. Not let anyone in and don't go anywhere that there might be exploits of any venerability on your system.

Security is not a switch, it is a continuing process.

There is this manual.
https://www.debian.org/doc/manuals/secu ... ex.en.html
It is a long read.

You will probably need to learn to use a search engine with your questions. Your topic is huge, very few posters will want to do more than just clarify something that you have already researched and don't quite understand.
Please read.
http://forums.debian.net/viewtopic.php?f=30&t=47078

But resist the urge to panic.
What makes you think there are criminals on your system?

[pcalvert]

Install FireHOL:

Code: Select all

aptitude update
aptitude install firehol
sed -i -e 's/START_FIREHOL=NO/START_FIREHOL=YES/' /etc/default/firehol
firehol restart

Execute those commands as the root user or use sudo.

Be careful! If the system is a server and you are accessing it by SSH, you will also be locked out.

IMPORTANT: Depending on how the criminals are accessing your system, the above steps may not be enough (and probably won't be). Save any data that you don't want to lose, take the system offline, format the partitions, and reinstall Debian. Yes, you will be reinstalling Debian (if you're smart).

Phil

[acewiza]

Install FireHOL:

Just recognize that IP Tables is no security panacea - no matter what front-end you use.

FireHOL is secure because it has been designed with the right firewalling concept: deny everything, then allow only what is needed.

The biggest system security issue today is the simple fact that malware is hiding in "only what is needed."

And sometimes people think they need the wrong things.

[stan7213]

Thanks for trying to help, but it is all not good enough !
I use firewall, block ports , but the criminals access the system, like there is no firewall.
Tried some other distibutions, always the same.
It seems to me, that there is a big, big security-hole in every linux-distri !
Any other good ideas ?

[pawRoot]

is this a troll thread?

[anticapitalista]

is this a troll thread?

That or a homework question.

[GarryRicketson]

Thanks for trying to help, but it is all not good enough !
I use firewall, block ports , but the criminals access the system, like there is no firewall.
Tried some other distibutions, always the same.
It seems to me, that there is a big, big security-hole in every linux-distri !
Any other good ideas ?

Well if you feel like this is something that is a problem with every linux distro,
maybe just go away, and use your beloved windows or what ever.
Good solutions were offered, but you choose to ignore them.

Please do not feed the troll, maybe it will go away.

[Hallvor]

Thanks for trying to help, but it is all not good enough !
I use firewall, block ports , but the criminals access the system, like there is no firewall.
Tried some other distibutions, always the same.
It seems to me, that there is a big, big security-hole in every linux-distri !
Any other good ideas ?

I suggest you use Windows to avoid all the security holes of Linux. Goodbye!

https://www.bleepingcomputer.com/forums ... ng-system/

[bw123]

I like the criminals, why you mad though?

https://en.wikipedia.org/wiki/Fun_Lovin'_Criminals

http://www.metrolyrics.com/the-fun-lovi ... inals.html

See I rob banks, I pull pranks, Sometimes I eat franks and knishes Best wishes, I'm vicious but here I am again like CNN, delivery my friend Stick 'em up punk, it's the Fun Lovin' Criminal, the criminal

[debiman]

I use firewall, block ports , but the criminals access the system, like there is no firewall.
Tried some other distibutions, always the same.

you haven't even told us what is happening!
tell us, show us: what do you see that makes you think "criminals access" your system?
until you do, i have to agree with the others.

[pcalvert]

I use firewall, block ports , but the criminals access the system, like there is no firewall.
Tried some other distibutions, always the same.
It seems to me, that there is a big, big security-hole in every linux-distri !

You need to provide us with details -- enough information so we will know everything you have done. If what you've written is true, then my guess is that you are making a serious mistake which is allowing the system to be compromised, and that is the cause of your problems. Without a lot more info, we can only guess what it might be.

Phil

[None1975]

Guys, please! Don't feed a troll.

[acewiza]

I deliberately fed the troll, just as an opportunity to repeat a bit of commonly recognized Linux security doctrine.