Security covers a wide-ranging set of topics including Users, Permissions, Authentication, Authorisation, Upgrades, Firewalling, Hardening, etc.

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1answer
41 views

Problem to current security

I have install ubuntu in my lap . But after restarting my lap there is a message that " ubuntu has blocked by current securty policy" what can i do?
0
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1answer
51 views

How to temporarily block network access to root user?

Just want to temporarily block network access sometimes, even to the root user. How can I do this?
0
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0answers
315 views

how to disable usb storage in ubuntu 13.10?

I want to block my all my USB mas storage and allow only devices like keyboard and mouse . I'm able to do so by following the KB. But the issue is that when I connect devices like mobile phones & ...
0
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0answers
41 views

Does the network proxy run after the VPN connection, no leakage whatsoever?

I'm inside a Ubuntu 12.04 Virtualbox guest (Bridged Adapter) and by finding 'Network' in the GUI, I can access three things, a VPN which I've configured to be an OpenVPN to a VPN, a 'Wired' connection ...
1
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0answers
63 views

does ubuntu 14.04 use ascii-armor and how to turn it on/off?

does ubuntu 14.04 use ascii-armor and how to turn it on/off? the purpose is to test some exploit and knowing that would help, I'm still in the learning process. I'm already aware of the stack ...
1
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2answers
49 views

Enable to connect to remote server using ssh but i can connect one remote server

When I am connecting to remote server using ip address, I can connect to 192.168.12.141, but I cannot connect to any another remote server. Example: 192.168.12.12, 13, 18 etc... How can I get ...
0
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1answer
137 views

Help writing server script to ban IP's from a list

I have a VPS that I use as an openvpn and web server. For some reason, my apache log files are filled with thousands of these hack attempts: "POST /xmlrpc.php HTTP/1.0" 404 395 These attack attempts ...
1
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1answer
68 views

What is the different between an Normal and Admin account?

What is the different between an Normal user account and the Admin account in Ubuntu? You must always enter your password if you want do something. Can you give a Normal account "limitations" to do ...
3
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1answer
57 views

How can I delete private information in a bug report?

If I report a bug to launchpad using ubuntu-bug it usually adds a bunch of files about my system to the bug, it also adds a automatic generated bug summary to my bug report text. Both the summary and ...
2
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1answer
30 views

Is there a way to work with files without leaving any trace of them? No showing up in recent lists in editors for example

I need to work with some files without leaving any long term trace of their existence - within reason. I don't care particularly if they could be pulled off the drive with recovery software, although ...
16
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3answers
2k views

What's the difference if I use Windows 7 as a Standard User vs if I use ubuntu?

Ubuntu is secure for various reasons, one of them, a major one I believe, is that when you try to install a software/app via terminal/store an authentication box pops up asking you for your password. ...
0
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1answer
476 views

I found the chromoting viewer in my chromium addons is that supposed to be there on a default install?

So I found chromoting viewer in my add-ons for chromium. Is that supposed to be there? I just installed chromium and only installed the pepper flash player. I disabled chromium and got an error is ...
0
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2answers
152 views

Firefox keeps going unresponsive and crashing

Ubuntu 14.04 32 bit up to date. I was recently hacked. Had to clean install from a live usb made off my network and network computers. Since clean installing firefox keeps going unresponsive and ...
0
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0answers
36 views

Most secure way to install node?

Should I install node as root and then add user permissions to run it, or add a sudo user to the sudoers file and install and run it that way? It seems to me that adding the user to sudo would be a ...
0
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1answer
88 views

CVE-2014-0196 and grs kernel [closed]

my client is renting a server in OVH. Everyone knows about OVH and their default kernel from GRS (( Can anybody say if the kernel 3.2.13-grsec-xxxx-grs-ipv6-64 is affected to CVE-2014-0196 (not ...
6
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1answer
1k views

How did this exploit allow write access to root owned files?

For a computer security assignment at my university I need to find and understand an exploit that works on ubuntu 10.04. I have already found and tested one on an Ubuntu 10.04 machine (that I own) ...
0
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0answers
17 views

Can I use Ubuntu as a front end in my network to help add security? [duplicate]

I still have a few XP machines that I need to keep on my network, I was told I can use Ubuntu as a machine to route all my network traffic thru to give the XP systems some added security. Can this be ...
0
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1answer
39 views

Made an ubuntu live usb on a compromised system. How to make sure the usb isn't compromised and how to securely reinstall ubuntu

I finally made an ubuntu live usb on a compromised ubuntu desktop laptop. Startup disk creator told me the usb was 7.2 gb, instead 7.8 gb and I believe the original hack involved my flash drive. Is ...
0
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0answers
50 views

Error in decrypting WEP-encrypted .pcap file

I got a pcap file containing captured WEP packets, and a WEP key to decrypt it. I tried using both Wireshark and airdecap-ng to decrypt the packet. The key is correct, so the decryption was done ...
5
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1answer
122 views

How do the security features in Ubuntu differ from Debian? [closed]

I am on the Debian Security Mailing list, and recently there has been a lot of traffic going back and forth about the security (particularly package updates) of Ubuntu vs Debian stable. A guy on the ...
0
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0answers
52 views

Weird error message and installation failure

I'm trying to create Live USB, and I think my 14.04 distro may be compromised. I just plugged in a new flash drive and an error popped up saying unable to mount usb as it's already open in another ...
3
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2answers
136 views

Will an upgrade of Ubuntu to a new LTS change SSH host key

I have recently upgraded my computer from ubuntu 12.04 to 14.04 LTS (in one step). After the upgrade, however, I got well-known warnings like ...
0
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1answer
43 views

Can 3rd-party package repositories be trusted? (Are there criteria to test if they're trustworthy?) [duplicate]

(Note: no disrespect whatever to the hard work people that people who run 3rd-party repositories put in.) I came across a package repository, a ppa, that was suggested for getting php5.5 on Ubuntu ...
0
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1answer
205 views

“Your Java version is out of date.” on Ubuntu 2014.04

With fully updated Ubuntu 2014.04, Firefox tells me: Your Java version is out of date. How to update Java? Typing java -version in a terminal tells me: java version "1.7.0_51" Java(TM) SE ...
0
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1answer
80 views

Enabling SSL on Squid

I installed Squid server and I am trying to secure it. In many searches, I see that is possible to enable SSL for squid. Is there any security benefits for squid server to enable SSL on it?
0
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0answers
80 views

Why am I getting Runtime Error in browser?

I get the following Error message in my browser: Server Error in '/' Application. Runtime Error Description: An application error occurred on the server. The current custom error settings for this ...
0
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0answers
1k views

Update to Clamav 0.98.3

I'm running Ubuntu 12.04 LTS. Upon updating clam definitions with sudo freshclam I got the message that my current clam software (0.98.1) was outdated and that I should upgrade to 0.98.3., which I ...
0
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0answers
44 views

Modifying the Ubuntu login process

I am looking to write an alternative implementation of the Ubuntu login to take advantage of an external device that supplies the login password. What are good pointers to get started? Are there ...
2
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2answers
3k views

How can I open Java's Control Panel?

How can I open Java's Control Panel to change the security settings?
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1answer
92 views

Found viruses on my machine by clamTK. Need help catching hackers

I ran clamTK on my 14.04 laptop and found 3 PUA's including one for phishing. I found them in /home/Draeko/.cache/mozilla/firefox/jsobiwpi.default/Cache/9/08/64101d01 .../Cache/4/2C/BS149d01 ...
0
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1answer
55 views

Proxy server security

I installed Squid, and in this server guide, there are some security configurations. Is there any risks when using a proxy server? What are Squid security threats?
3
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1answer
221 views

Why do I have new and strange networks (_not wifi_) in my network manager? 14.04

Ok, so I updated my system to 14.04 last week (running on a Dell XPS13 ultrabook- but I'm not a developer, not particularly technically minded). Some strange things happened with network manager. ...
0
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2answers
38 views

ppa and System Security

I have been installing all my software from the Ubuntu Software Center. Recently, I had been installing software from PPAs. Can adding PPAs and installing software from them compromise the security of ...
2
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0answers
106 views

Tiger: `rtm` is listening on socket XXXX

On my Ubuntu serve 12.04 LTS, Tiger is reporting a lot of stuffs like this: OLD: --WARN-- [lin002i] The process `rtm' is listening on socket 60404 (UDP) on every interface. NEW: --WARN-- [lin002i] ...
0
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0answers
38 views

Uninstall core fonts leads to install of Flash?

I was installing ubuntu-restricted-extras and the install didn't finish, I got a warning that the core fonts and something else were not installed properly. So I uninstalled, but didn't like that it ...
-4
votes
3answers
240 views

Can someone please clear up the haziness regarding security in Ubuntu and the other recognised distros?

I was using Ubuntu, but after updating to 14.04 LTS the Unity Desktop did not perform particularly well. So after research, I switched to Xubuntu, a recognised version of Ubuntu running the Xfce ...
1
vote
1answer
35 views

Some way to block access to certain directories for tech support?

I'm about to ship my laptop to tech support and I started thinking, I don't want them going through my downloads or family photos, etc, however they require the administrator password. The problem ...
1
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1answer
57 views

File access control mechanism in Ubuntu 13.10

Can someone tell me where I can find detailed description about file access control mechanism used in Ubuntu 13.10 desktop. I already tried Ubuntu documentation, thank you.
0
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1answer
91 views

Software center shows that Google Docs has been installed [closed]

I made a Gmail to message the owners of a blog I follow because some of their recent posts seemed like personal attacks. After I messaged them I have no reply and they deleted my disqus post on their ...
0
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2answers
310 views

When will Flash Player 11.2.202.356 security update will be available

Adobe Systems released emergency security updates for Flash Player in order to fix a vulnerability that has been exploited in attacks against users since earlier this month. Software center provides ...
2
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0answers
112 views

How can I use a Verbatim Secure'n'Go USB key?

I have purchased a 4Gb USB key from Verbatim. How can I use it under Ubuntu? I do not need the "secure data" feature, and have still not saved anything on it, so formatting at low level would be OK. ...
0
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1answer
45 views

How do you connect to a network that IS broadcasting but DOES NOT have an SSID?

I have access to the MAC address and signal strength. He's not jamming my network, but he is bridging my wireless network. I want to connect to his network and figure out what he's doing. Any advice ...
0
votes
1answer
57 views

Preventing Déjà Dup from attempting a backup when out of my network

I’ve set Déjà Dup to back up daily to my home network’s Synology NAS (by WebDAV, if you’re curious). The problem is that my laptop comes with me to many places. My laptop does not seem to realise ...
1
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2answers
501 views

How can I stop my server being an “open DNS resolver”?

This morning I got a letter from my ISP saying that my Ubuntu Server (13.10) can be used as an "open DNS resolver". They propose 3 possible solutions to fix this problem: Limit access to recursive ...
0
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0answers
868 views

Create x11vnc password file with both admin and viewonly password on 12.0.4LTS

Using Ubuntu 12.0.4 LTS and need to enable x11vnc access with admin and viewonly access based on which vnc password is supplied. The x11vnc server gets started out of /etc/lightdm/start via: ...
3
votes
1answer
92 views

Kernel security settings

What is the right security setting for the net.ipv4.conf.all.secure_redirects option in sysctl.conf? Here it sets to 1 and Here sets to 0. Is net.ipv4.conf.default.secure_redirects related to ...
3
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1answer
98 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 ...
0
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0answers
25 views

Ubuntu Repository Security [duplicate]

I notice that Ubuntu repositories is not HTTPS, all links in /etc/apt/source.list in http links. This is a peace of my repository links: deb http://archive.ubuntu.com/ubuntu saucy main restricted ...
0
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1answer
26 views

Can I secure a webpage with something other than username/password

I want to secure a webpage, but I want something better than username and password. Is there any public key style authentication for a webpage? I'm not concerned with the usability / convenience of a ...
0
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1answer
47 views

LOIC to work in ubuntu

i have been wondering on using LOIC(Low Orbit Ion Cannon) in ubuntu,but the problem is will it work in ubuntu 13.10 because LOIC is developed in .Net. how to get LOIC working in ubuntu?