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Author Topic: Securing machine exposed to internet  (Read 528 times)

Weaver

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Securing machine exposed to internet
« on: June 19, 2019, 08:58:23 AM »

I have an Ubuntu machine that is hosted. Itís currently sitting in the internet with no firewall in front of it. Could someone help me to secure it to a sane standard, also firewalling considerations?
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parkdale

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Re: Securing machine exposed to internet
« Reply #1 on: June 19, 2019, 01:21:50 PM »

https://help.ubuntu.com/community/IptablesHowTo will explain how to set a firewall....  Although I seem to remember you had a go at this before and locked yourself out :-\
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Weaver

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Re: Securing machine exposed to internet
« Reply #2 on: June 19, 2019, 04:10:51 PM »

I did, and ended up, locked out. I talked to Burrakucat about that. I have no problem in that I donít lose anything, as all my sources are backed up on my iPad but having to reinstate everything by hand is a pain after I wreck the machine and have to wipe it. I need to get some system sorted out for backing up the core configuration stuff. But that is a nightmare.

Another question I wanted to ask about software firewalling. I am obviously not completely shielding the machine from loss of CPU cycles but I suppose the software firewall throws things away before it can have any further knock-on implications caused by processes that accept requests for communication on particular ports and go on to do something or other even if it is only to find out after a very short time that the communicant is illegitimate and thus rejecting it. Maybe the firewall provides a shortcut to rejection, in a guaranteed minimum time.

If you are not using firewalling as a form of ACL security measure, where the blocking of certain ports / protocols is used  to prevent users running certain types of software successfully. But if you have no rogue users then is there any point to a software firewall?

I was also thinking about other security basics though. What else should I be thinking of?

Burrakucat has volunteered to nmap me.
« Last Edit: June 19, 2019, 04:20:45 PM by Weaver »
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anything