0
votes
0answers
43 views

how to install mod_security apache2.4

I was looking at my logs yesterday, when I saw a bot roaming folders I have in my robots.txt file. I tried to block it with a rule in my UFW firewall, but this did not keep them out. So then I was ...
0
votes
1answer
43 views

I have some questions about Firewall [closed]

So I am pretty new to Linux (With the exception of Android), and being use to the old ways of Windows pretty much all I had to do for Firewall was turn it on and forget about it. However with Ubuntu ...
14
votes
6answers
4k views

Does spyware exist for ubuntu?

Someone I know said he had put spyware on my computer. Is he talking crap? I've been using Ubuntu 12.04 for nearly 3 years now and I've never seen any type of spyware, remote keyloggers or RATS ...
3
votes
1answer
87 views

Juju security model issues

What plans are there to extend the security model in Juju? We see two significant issues with the current model - no internal firewalling within an environment, and the inability to expose ports to ...
3
votes
1answer
321 views

basic security tools and packages that should be installed on a public facing web server

I'm a newbie in this world and I do not have a lot of knowledge about how security works on Linux systems. I recently created a droplet on DigitalOcean with Ubuntu 13 and I've been setting it up by ...
0
votes
0answers
80 views

Analyze firewall logs to track intrusion

I have just started this topic where the firewall on my router detects intrusions e.g. Mar 11 14:15:11 kernel warning kernel: [fwlog] Intrusion -> SRC=85.102.133.241 DST=109.78.126.234 ...
3
votes
2answers
7k views

Help! My server has been hacked - .IptabLes and .IptabLex in /boot [closed]

I'm running a Ubuntu 6.06 dapper server and it has been hacked. I'll admit up front here that I'm a programmer and not a system administrator so even though I've worked with Unix/Linux for years my ...
2
votes
1answer
167 views

Is it necessary to have a Firewall in Ubuntu?

I was wondering if a Firewall could give some more security, and if yes which one would you recommend.
2
votes
2answers
285 views

UFW and firewall

So I recently installed ubuntu and I have been working with it no problem.While browsing through the security guides (specifically: https://wiki.ubuntu.com/BasicSecurity) I noticed this: "enable the ...
0
votes
0answers
38 views

Too Many unsolicited “Incoming Connections”

With the ufw rule "deny incoming", ufw logs as many as 2 to 3 block packets from random IPs on random ports. I find it quite irritating. I was just wondering if this is normal "midirected" internet ...
0
votes
0answers
167 views

I have UFW block messages from local network machines, how can I analyse if they are malicious?

I'm getting a lot of messages in my UFW log, and I'm trying to figure out if these are malicious or just normal. A UDP broadcast is coming from a windows laptop x.x.x.191, and some from our synology ...
1
vote
2answers
1k views

Ubuntu - apt-get not working behind restricted internet access

I have Ubuntu 12.04 64-bit boxes running in a company but they have internet browsing and firewalls for security. When I do apt-get update or install it fails. But I have a remote server which ip is ...
1
vote
0answers
61 views

Can a weak Ubuntu user password be a risk for ONLINE security?

Can anyone gain an unauthorized remote access to my Ubuntu machine? Does having a strong user password really helps prevent this? Or firewall just doesn't let anyone in by default, regardless of the ...
1
vote
2answers
1k views

ufw firewall operation

I have always run the program UFW as my firewall in Ubuntu, and been satisifed with its performance. When I installed Ubuntu 13.04, and enabled ufw, I was not able to access the internet, and all ...
20
votes
3answers
1k views

What automated intrusion notification/detection setup is good for home desktop use?

I've been using Linux for quite a while now and I always feel the need to have a passive software / script setup which can alert me of any suspicious network activities like scans, failed login ...
1
vote
1answer
455 views

Setup firewall: ask user to allow new incoming/outgoing traffic?

I'm using Ubuntu 12.10 and as I know there is already a firewall on any ubuntu system. It's ufw and because I like fancy gui stuff I can use gufw, that's very nice. Now I would like to configure this ...
5
votes
4answers
454 views

How to protect Ubuntu12.10 from Viruses, Spywares, Spamware and Intruders?

I have been using Windows OS for a long time and there i needed to install a separate Anti virus Program (included with firewall, anti spam) etc.. With my mentor's recommendation, I have replaced ...
49
votes
7answers
3k views

What are the risks of NOT using a firewall (home computer)?

Since a password is required to be a superuser (to install and modify programs), what are the risks to not use a firewall under Ubuntu ? More particularly if I am using a NAT router ?
1
vote
0answers
180 views

Ubuntu all versions from 10.04 till 12.10 [closed]

Is simply enabling the firewall ufw (sudo ufw enable) sufficient enough for protection of the OS ? I mean should extra rules be added for 'better' protection, or is simply enabling the firewall enough ...
4
votes
2answers
669 views

What additional security measures should I apply for Ubuntu?

So on my Windows 7 install, I've got multiple free malware/virus scanners and a firewall up. But I've heard that Ubuntu (or Linux in general) is much more secure by default. So what additional ...
7
votes
1answer
19k views

What are ICMP redirects and should they be blocked?

After enabling ufw and the Tiger security auditor, I see warnings saying: The system accepts ICMP redirection messages What are ICMP redirection messages? Should they be disabled for security ...
1
vote
1answer
644 views

How do I check the status of apf firewall?

How to check whether apf (Advanced Policy Firewall) is running after the reboot? It doesn’t have any status, so how can we know?
0
votes
0answers
330 views

does ubuntu 10 04 lts have a built in firewall and antivirus [duplicate]

Possible Duplicate: Is there a preinstalled or automatic firewall? Do I need to have 'antivirus software' installed? I have just installed ubuntu 10 04 lts on my laptop and I am ...
2
votes
3answers
4k views

What Firewall, anti DDOS and anti Brute-Force managers exist in Ubuntu

I have heard of ufw and of course using iptables but is there any other firewall or port manager for incoming/outgoing connections. I am also looking for GUI based ones apart from terminal ones and a ...
5
votes
2answers
300 views

Is portfowarding to my localhost on my personal Ubuntu computer secure?

After installing Lamp on my personally Ubuntu computer, I am running a application that requires to connect to the web and send SMTP mail; for example paypal needs a www address to notify successful ...
7
votes
4answers
14k views

What rules to use for UFW?

I've decided to enable the UFW that comes with Ubuntu just to make my system even more secure (especially after watching a video of a person whose computer actually got infected!), and I've enabled ...
1
vote
1answer
852 views

How to run any program but prevent it from accessing the Internet

I see a nice tutorial on the subject from 2009: http://ubuntuforums.org/showthread.php?t=1188099 But wanted something that will (more likely) work on Ubuntu 11.10. This is a flavor of an ...
2
votes
1answer
273 views

Enforce outgoing port for a machine inside LAN

I'm running Ubuntu Server (natty) in as a gateway/firewall in front of a private network. I have successfully enabled IP forwarding and NAT so the machines behind the firewall can connect to Internet ...
3
votes
1answer
322 views

How can I block a range of IPv6 addresses?

Are there any IP blocking applications or firewalls that support IPv6? The ones I know about (pgld, moblock (sunset?) , nfblock, iplist (looks old)) are only for IPv4.
9
votes
1answer
807 views

Precautionary security measures for a home user? (firewall, antivirus, etc)

I just recently made the switch from Windows to Ubuntu, and I'm just a little paranoid when it comes to security measures. I've looked around and from what I've read, security is not as big a concern ...
4
votes
3answers
6k views

Why UFW has to be (re)started at boot time if it's only iptables rule manager?

README from source package says: When installing ufw from source, you will also need to integrate it into your boot process for the firewall to start when you restart your system. Depending on your ...
12
votes
8answers
3k views

Is a Firewall really necessary these days? [closed]

should I install something like gufw?
33
votes
5answers
10k views

Why is the firewall disabled by default?

Why is ufw firewall included in Ubuntu, when it is not enabled and pre-configured by default? Most users don't even know it is there, because no GUI frontend is provided.
11
votes
4answers
15k views

How can I block ping requests with IPTables?

and stealth specific ports?
5
votes
2answers
974 views

Ubuntu comes with firewall by default?

I understand the Ubuntu comes with firwallul UFW is true? There is a GUI for it? if so, what is his name and where do I download? It is possible that UFW notify us (like in windows with a pop-up ...
17
votes
5answers
5k views

Is there a preinstalled or automatic firewall?

Does Ubuntu come with a preinstalled or automatic firewall? If not, do I need one? I've read some articles about the advantages of linux over other operating systems about security (no need to have ...
2
votes
3answers
454 views

Is it possible to configure Ubuntu as a software firewall?

I have some systems running on Ubuntu in the private IP range 192.168.2.0-255 . These systems are connected to a switch and the switch is connected to the ISP's modem. Neither the switch nor the ...
8
votes
2answers
6k views

How to set up an Ubuntu 10.04 machine to accept ssh requests only from within the local network?

I am about to install 10.04 (from bare metal to replace 9.04) and I want to set it up so that I can shh into the machine, but only from other machines on my local network. (I.e., I want to reject all ...