Tightening security on a system.

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7
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4answers
259 views

Alternatives to the “open PC” security model

Today, PCs (laptops, desktops, etc.) generally work under what I'll call the "open PC" security model. Users have full, system administrator/developer-level access to their own machine. Users can ...
78
votes
14answers
17k views

Apache Server Hardening

What are some best practices, recommendations, required reading for securing an Apache Server?
1
vote
1answer
293 views

Effectiveness of Belarc Advisor

I have seen some people recommend Belarc Advisor for Windows hardening, especially for servers. It's supposed to check for stuff such as installed hotfixes and CIS benchmarks (<-- which are great, ...
5
votes
1answer
186 views

What can be done to bridge the Air Gap, except autorun?

What can be done to bridge the Air Gap, except autorun? Is there any hardware butterflies that can attack physically isolated Unix/Linux machine in common usb drives, like VSC (Vendor Specific ...
15
votes
3answers
1k views

Why doesn't Linux randomize the address of the executable code segment?

I've recently been learning about how ASLR (address space randomization) works on Linux. At least on Fedora and Red Hat Enterprise Linux, there are two kinds of executable programs: Position ...
14
votes
2answers
2k views

Security implications of having files owned by the apache user?

Currently running a LAMP instance that developers are using for a variety of webapps. I have the following scenario: Multiple developers need access to create and modify files under ...
32
votes
9answers
26k views

Why block outgoing network traffic with a firewall?

In terms of a home network, is there any reason to set up a router firewall so that all outgoing ports are blocked, and then open specific ports for things such as HTTP, HTTPS, etc. Given that every ...
10
votes
1answer
725 views

Why are some DLLs not randomized? What makes it hard to deploy full ASLR for all DLLs?

One of the challenges with deploying ASLR for everything is that, at least on Windows, some DLLs (libraries) are not compiled in a way that's compatible with ASLR. (They're not compiled as ...
7
votes
1answer
5k views

How to secure a ActiveMQ?

Does anybody have experience with securing/hardening ActiveMQ? Check lists or guides would be welcome.
25
votes
6answers
3k views

Most secure way to partition linux?

I recently acquired a netbook to play with, and I want to install Kali Linux so I can start learning about network security and exploit development. I want to use this to learn as much about security ...
8
votes
1answer
2k views

How to audit web servers for resistance/vulnerability to BREACH

BREACH, a new attack on SSL that targets HTTP compression, has recently been publicly announced. I manage a few web servers. How can I audit them to check which of them are potentially vulnerable to ...
7
votes
3answers
1k views

Is it a secure way to declare DB parameters in htaccess rather than in a PHP file?

It has been suggested in securing PHP article that using directive as below in htaccess is more secure than hardcoding it into your app: <VirtualHost ilia.ws> Include /home/ilia/sql.cnf ...
-2
votes
2answers
81 views

Block all kind of querys from ip [closed]

I want to check my network intrusion detection system (physical intrusion like unauthorized gadgets or devices in wifi/ethernet). Until now everything is ok, but I was wondering if I block every query ...
5
votes
2answers
227 views

Configuring election website to prevent MITM attacks

Consider an election web site that will be used for voting over the Internet. What steps should the administrator of such a web site take to provide adequate security against man-in-the-middle attacks ...
13
votes
4answers
2k views

Recommendations for Changing the Default Shell For Service Accounts

It seems as if most Linux systems use either /sbin/nologin or /bin/false as the default shell for service accounts. Many hardening guides, such as CIS benchmarks, recommend changing the default shell ...
5
votes
3answers
313 views

An OS that does not trust its RAM?

I wonder if it is possible to write a kernel that would keep all of its RAM encrypted, storing the key in the CPU cache, so that the machine would be resistant to cold-boot attacks?
7
votes
1answer
506 views

How does ASCII-Armoring help to prevent buffer-overflow attacks?

I was reading about return-to-libc attacks at Wikipedia. According to what I read and understood from the article, ASCII armoring means that binary data is converted into ASCII values by grouping ...
7
votes
2answers
303 views

Do I have to harden IE if I'm only using Firefox?

Assume a Windows 7 system (probably whatever home version comes with the machine), with the latest OS patches, latest IE and latest Firefox. Also assume that the user uses only Firefox for browsing, ...
4
votes
4answers
1k views

Database hardening techniques

So as I understand it database hardening is a process in which you remove the vulnerabilities that result from lax con-figuration options. This can sometimes compensate for exploitable vendor bugs. ...
1
vote
1answer
285 views

What are the basic implementations that make a network secure from the inside\outside?

Would you consider the following to be "basic hardening items" for network equipment and servers? VLANs Access Control (such as NTFS permissions) Patch Management System Host Firewall Anti-Virus ...
2
votes
1answer
95 views

Quick Security Mitigations to Impending attacks

Suppose you are the sysadmin, and you know of an impending attack that just started or about to start soon. You can either wait it out, or try a few tricks and quick mitigation to fend off attackers ...
4
votes
3answers
159 views

Defense in depth vs low complexity - Balancing point?

I've asked a few questions relating to schemes for various security-related functions, and posited schemes to accomplish those goals. In the responses, I see a conflict between two fundamental ...
0
votes
1answer
490 views

Hardening Web Browsers - Detailed Guidance

Is there any specific and complete guidance on what is needed to harden a web browser given the number of attack vectors possible, particularly given that browsers allow so many varied plugins? All I ...
14
votes
3answers
3k views

Bruteforce attack on my FTP server

I recently setup VSFTPD on my personal server for sharing files over FTP. In the vsftpd.log file, i see hundreds of failed attempts to login with usernames like "adminitrator" , "adminitrator1", ...
6
votes
2answers
3k views

php.ini security setting after attack

My website have been attacked and I need a best practice for a php.ini I have done some reading but I am still not sure if I covered most of the options. here is my settings: file_uploads = Off ...
2
votes
2answers
290 views

Checklist for securing MacOSX

Is there a checklist for securing MacOSX machines?
2
votes
1answer
129 views

Forefront Identity Management Server Hardening

Is there a good document for hardening FIM? I've tried CIS and NIST, but I couldn't find anything. If there is no such document, what would I have to look out for in the configuration?
6
votes
3answers
1k views

IIS and SQLServer Hardening

long story short: I'm an engineer doing development, not administration. I have no direct access to the production server, so I can only tell the administration team the best configurations for ...
36
votes
8answers
2k views

What methods are available for securing SSH?

What methods are available for securing SSH?
5
votes
2answers
2k views

How to harden my Buffalo LinkStation Pro?

The Buffalo LinkStation Pro Duo that we use can be pretty easily hacked into. The good thing about this is that this NAS runs Linux and can therby be improved in features, e.g. running an NFS or LDAP ...
2
votes
2answers
1k views

How to correctly secure a ssh session against MITM attack?

How do you improve the security of your ssh session against a man-in-the-middle attack?
8
votes
2answers
922 views

Can a webcam be turned on when disabled in Windows' device manager?

In addition to whether a webcam can be turned on without the indicator light, I was wondering if disabling the device in Windows' device manager is a good option. Of course when your system is ...
4
votes
2answers
1k views

How helpful is rkhunter?

I have a software firewall implemented on my server, and I have closed all unnecessary ports. I have strong passwords, and I validate user input on my website. With these things already in place, do ...
4
votes
3answers
421 views

How would one make a network resistant to the unknown?

I play in a game which includes normal risks, but also a wide range of supernatural powers which could affect the security of a network. These may be as prosaic as a retrieving data directly from a ...
6
votes
3answers
2k views

What can a hacker do when he has physical access to a system?

I mean, I'm a tech guy here in my region (not a hacker...). When I sit in the front of another person's PC, I notice a little fear about what I can do in the system. It's obvious that I will not ...
17
votes
4answers
3k views

Windows hardening

Can anyone point me at some good resources on Windows hardening? From 2003 upwards.
3
votes
3answers
273 views

Why should every file have a user and a group?

I've been reading in most hardening guides for linux, that you should check for files and directories without valid user or valid group. What I can't find, is how this could be used for an attack, or ...
11
votes
3answers
3k views

How can I prevent someone from accessing a Windows XP system via boot disk?

Apparently a computer system protected by a a login password, e.g. Windows XP, can be easily hacked by someone with physical access to it using methods like this one: ...
20
votes
3answers
6k views

What are the best practices for hardening a php.ini file?

In order to secure a PHP installation, what are the best settings for a php.ini file? What is absolutely vital in terms of security? What is recommended for most use cases?
1
vote
3answers
4k views

Building a secure server with CentOs [duplicate]

Possible Duplicate: Hardening Linux Server I recently started to manage my own server with a cloud-based server. Recently I got hacked somehow and the server was used for phising. On the ...
3
votes
2answers
231 views

Protect sensitive data from sysadmin prying eyes

I'm thinking about this problem. What if I have to manage sensitive data (i.e. health data), and I use a managed server? I'd use encryption of course, but if they have root access they can see conf ...
1
vote
3answers
450 views

Is this approach of securing cookie secure?

I could not find writeups about secure cookies so I have done some thinking. (I already have a "secure" password database with bcrypt and salt) Steps: User logs in Save user IP + randomstring in ...
2
votes
1answer
694 views

Hardening a perimeter router

What are some of the steps that could be taken to harden a perimeter (internet facing) router from attacks by potentially malicious users?
1
vote
1answer
1k views

How do these Windows services affect the security of Windows Firewall?

Its common to disable unneeded services in Windows 2008 R2, but sometimes I come across installations that use Windows Firewall and related services. More info: see service dependencies for Windows ...
6
votes
1answer
408 views

What are some good ways to secure personal computers

I see that many topics here are related to securing data, equipment at an enterprise level. Good advice includes stuff like blocking all unused ports, allowing only whitelisted traffic and installing ...
2
votes
1answer
996 views

EMV Security? How is it possible that it's secure?

I recently read some articles on EMV and the various ways in which it has been improved over the years. I then read this which shows that it has been possible for some time to exploit EMV via a man ...
1
vote
2answers
473 views

What are best practices for implementing Remote Desktop within a corporation?

After the recent critical vulnerability: 'MS12-020: Vulnerabilities in Remote Desktop could allow remote code execution' I have been looking for a hardening checklist or in the scenario that I am an ...
2
votes
2answers
1k views

NSA RHEL5 Checklist

The NSA has came up with the "Guide to the Secure Conguration of Red Hat Enterprise Linux 5" (http://www.nsa.gov/ia/_files/os/redhat/NSA_RHEL_5_GUIDE_v4.2.pdf) I have read through this guide and it is ...
1
vote
2answers
616 views

Hardening network infrastrucure? [closed]

I would like to know, what are the best hardening methodologies, procedures, and books to use when hardening your network? Especially for the following: Windows /Linux Server SQL server Microsoft ...
8
votes
4answers
3k views

How to disable Firewire in OpenBSD/Linux to prevent attacks through Firewire?

Since Firewire lacks security, allowing a plugged-in device to access host memory, it's a good thing to fully disable it. If we're not using the BIOS to disable the Firewire port then how could we do ...