- I decided to search for articles comparing hardware and software firewallsSource 1: http://www.smallbusinesscomputing.com/w ... hp/3103431
This is a good article that compares hardware firewalls and software firewalls...
Summarizing it:
Hardware Firewall:
- Pro: No resource usage on the computers
- Pro: Can protect a range of computers behind the firewall
- Con: Most routers allow outbound traffic without checking. So, if malicious traffic originated from within the network, it would not stop it - for example, a virus in your computer sending mass mails using port 25, or a key logger somehow installed
Software Firewall:
- Con: Well the firewall runs off of system resources
- Con: Can protect only the computer it is installed on
- Pro: Has strict controls in the sense of what "programs" are allowed access and at what ports, rather than just general port settings and the like. So, if there is a virus and it tries to use port 25 to send mass spam mail, the software firewall would not let it run, as it is not an authorized program to use that port, even before that - to access the net
Source 2: http://blog.zonelabs.com/blog/2006/03/3 ... sons_.html
Another site, this ones more of why hardware firewall alone isn't enough
Summarizing it:
- Hardware firewalls won't prevent spreading of malicious worms from spreading and damaging other computers that have gotten into the network
- At public hotspots, you have no firewall!
- A more informed filtering decision can be made, i.e. better tailored rules can be made for better security
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( 2.7 / 28 )Subject says it all:
http://www.ss64.com/bash/
Contains a list of bash commands with helpful information on usage
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( 3 / 28 )Ah...system Monitoring, it is pretty important...being used to the good old Ctrl+Alt+Del in Windows (or Ctrl+Shift+Esc), I was somewhat clueless stuck in the command prompt in Linux. After some searching, here are some useful commands I found:
Sources:
http://www.redhat.com/docs/manuals/linu ... tools.html
http://www.ss64.com/bash/
free: Displays memory usage data (this can be coupled with watch so that we can see the ongoing usage (watch free displays the data every 2 seconds; time-delay can be controlled by using the -n option; changes can be highlighted using the -d option)
top: Displays data on memory usage, CPU usage, process statistics etc
df: Displays usage stats for all mounted disks
du: Displays estimate of file disk space usage
ps: Displays process status
I have tried to stick to basic tools generally available
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( 2.8 / 25 )Excellent and simple guide: http://ubuntuforums.org/showthread.php?t=518293
I am tempted to put the whole post up here...but may be a little big
vsftpd itself is also nice and simple
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( 2.8 / 107 )This is using apt. I thought I'd post this, in the case I ever did this mistake (of deleting config files by hand)
Source: http://www.linuxquestions.org/questions ... ge-237772/
apt-get --purge remove <package>
Here's the case. I used apt-get to remove a package I though I would no longer use. Some time went by and it looke like I was done with it so I manually deleted the config files for that package just to clean up the drive. Some time went by and I needed to use that package again so I used apt-get to install it again. The 2nd time around the package does not have nor generate the config files. I'm assuming since it was installed once it expected them to be there and did not make them this time.
You should never remove files by hand use dpkg --purge <package> if you have already removed it with apt plus the files by hand and it thinks it is still configured this should get rid of it.
How do I get a total uninstall with apt-get? So when that above situation happens the reinstalled package will be complete by making the configs again.
See above and try apt-get --reinstall install <package> to see if it helps if not the dpkg --purge then reinstall.
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